ISSN:0373-4137    

DOI:10.1080/11250006009438307

出版商:Taylor & Francis Group    

年代:1960

数据来源: Taylor

ISSN:0373-4137    

DOI:10.1080/11250006009438308

出版商:Taylor & Francis Group    

年代:1960

数据来源: Taylor

摘要:

EightTriturus cristatus Laur.adult ♀ ♀ were treated with testosterone prnprionale after castration. The development of male sexual secondary characters as previously demonstrated by De. Beumont (1929) by means of testicular implants, was observed. The following structural changes were furthermore evidenced by the present investigation: 1) changes in the shape and size of the cloacal cavity and cloacal papilla. 2) inhibition of keralinization in the epidermis, and its suhstitution by a pluristratified columnar epithelium. typical of ♂ ♂, at the level of the cutaneous processes bordering the posterior end of the cloacal cleft. Such epithelium gives origin to both cutaneous glands and abdominal glands. 3) Functional activity is detectable in the tubules of the abdominal gland. Some segments are distended with secretion into conspicuous sacs. They develop in length as far as the lumbar region. 4) The uniformcly mucous secreting cells lining the cloacal chamber in the normal ♀ differentiate into a ciliated epithelium at the level of the dorsal groove, and into both ciliated and goblet cells along the side walls. They undergo, therefore, the same ‘modulation’ taking place in the ♂ cloacal epithelium at the time of functional awakening after the quiescent period at each annual cycle. 5) In the pelvie gland, which differentiates from the ‘recepta-culum scminis’, three types of tubules are demonstrable, according to their size, stainability of the secretion granula, and site of origin. The medial ones are seen to reach the region of the lumbar kidney.

ISSN:0373-4137    

DOI:10.1080/11250006009438309

出版商:Taylor & Francis Group    

年代:1960

数据来源: Taylor

摘要:

L'A. souligue l'importance d'une recherche synécologique comparative sur les éponges, conduite d'une facon organique, et rel'eve l'intérét que la baie de Naples prrsente par sa variété de biotopes. Les biotopes des zones méso., infra. ct circalittorales de ce golfe sont passées apidement en revue, et certains résultats déjà obtenus sont esposés. L'A. passe ensuite à das considérations génerales sur les prinecipaux facteus écologiques influencant la distribution des Poriferes, et propose une méthode pratique pour les relèvés quantitatifs des éponges, même venant de biotopes de profondeur. Cette méthode est valable aussi bien pour une caractérisation plus précise des différentes faunes, que pour l'appréciation de leurs variations saisonuières et annuelles.

ISSN:0373-4137    

DOI:10.1080/11250006009438310

出版商:Taylor & Francis Group    

年代:1960

数据来源: Taylor

摘要:

L'A. retrouve daus les plexus nervcux intestinaux de Auerbach de l'intestin grçle du souris blane les deux types morphologiques classiques distingés par Dogiel. Il précise aussi quelques donuées morphologiques relativement à la distribution de la substance de Nissl.

ISSN:0373-4137    

DOI:10.1080/11250006009438311

出版商:Taylor & Francis Group    

年代:1960

数据来源: Taylor

摘要:

The A. makes known some results of an electron microscopy research about tlic structure of cortex and involucra in ripe, or near to ripeness, ovaric oocytes ofDiscoglossus pictusOtth. In particular, he discusses the problem of the identity of the zona ruliata, as it appears in ordinary microscopy, with themicrorilli-layer, that one points out in. electronic research, and he put forth substantial reasons of perplexity on this identity, shown by some AA. The A. inclines rather for the identity betweenzona radialaand layer ofcrests, lying below that ofmicrovilli, which, as a rule, emerge from the peak of crests.

ISSN:0373-4137    

DOI:10.1080/11250006009438312

出版商:Taylor & Francis Group    

年代:1960

数据来源: Taylor

摘要:

In th epresent work, caudal regeneration inAllulobophora caliginosa has been studied, following a simple tranverse cut two or three segments behind the elitellum. It is pointed out that all the data put forward (ecllular migrations) requires a confirmation by means of the use of a more adequate technique: this data show, anyhow, a high degree of probability.

ISSN:0373-4137    

DOI:10.1080/11250006009438313

出版商:Taylor & Francis Group    

年代:1960

数据来源: Taylor

摘要:

Partant d'une première souche composée d'individus engendrés par une seule femelle parthénogénéique aptère deMyzodes persicaeet jouissant des conditions du milieu favorables à la création des formes ailées jusqu'à les faire disparaître à la neuvième génération. Les contrçles démontraient la présence normale des formes ailées en un rapport très proche du rapport initial.

ISSN:0373-4137    

DOI:10.1080/11250006009438314

出版商:Taylor & Francis Group    

年代:1960

数据来源: Taylor

摘要:

IaAllolobophoru caliginosa, as well as inEisenia foelida and in Lumbricus terrestris, the celomocytes are represented by eleocyles, amoebocytes and eosinophil leucocytes.

ISSN:0373-4137    

DOI:10.1080/11250006009438315

出版商:Taylor & Francis Group    

年代:1960

数据来源: Taylor

ISSN:0373-4137    

DOI:10.1080/11250006009438316

出版商:Taylor & Francis Group    

年代:1960

数据来源: Taylor