摘要:

The presence of pteridine and of riboflavina in the malpighien tube of theSarcophagha haemorrhoidalisFll has been proved. The researches were made on adult individuals and on larva in the III state. The pteridinic substance is often similar to the yellow substance found in the eye of the sameSarcophogaand in that of the mutantsepia(se> ofDrosophila melagonasterMeig. This pteridina therefore might be the N 8 lactyl-7,8 dihidro-2 amino-4 hydroxy-6 carboxylpteridine. In the malpighian tube of the adult individual a stronger concentration of the pteridina in proportion to the riboflavina can be noted; on the other hand the countrary can be observed in the larva of the III state, The result of such compared physiological observations are discussed and some hypotheses are made concerning the origin of the newly found pteridina.

ISSN:0373-4137    

DOI:10.1080/11250005609438224

出版商:Taylor & Francis Group    

年代:1956

数据来源: Taylor

摘要:

The finding ofNiphargus longicaudutusCosta in some deep waters of Calabria is notified by the A.

ISSN:0373-4137    

DOI:10.1080/11250005609438225

出版商:Taylor & Francis Group    

年代:1956

数据来源: Taylor

摘要:

The : variations in the electric activity of the cerebellum during and after rotation of the animals have been recorded in domestic and homing pigeons, as well as stationary and migratory turtle doves. Various types of electrodes were used: 1) external, 2) inserted into the sides of the vermen, 3) bifilar microelectrodes and 4) concentrical electrodes laid on the vermen. Electrical recordings were effected simultaneously with those of the tangential and centripetal acceleration forces determined by the rotation. In all cases a rimareable increase in the amplitude of the cerebellar potential during the action of tangential and centripetal acceleration was noted. A higly characteristic reaction in the form of rhylmical prolonged « after discharges » was found to be present whit homing pigeons and migratory turtle doves, while it was absent in domestic pigeons and stationary doves.

ISSN:0373-4137    

DOI:10.1080/11250005609438226

出版商:Taylor & Francis Group    

年代:1956

数据来源: Taylor

摘要:

The topography of the cloaca and cloacal glands of the adult male inTriturus cristatus carnifexLaur. is described. The different morphological macroscopic characteristics shown by the cloacal glands proper, the pelvic gland, and the abdominal gland, are recorded. Brief mention is made of a constant feature, representing a valve found at the passage of the cloacal tube (Urodaeum) into the clocal chamber (Proctodaeum). The valve is built up of a conspicuous ridge rising from the dorsal aspect of the cephalic end of the cloacal papilla, and the caudal end of a prominent longitudinal fold projecting from the mid-ventral wall of the cloacal tube.

ISSN:0373-4137    

DOI:10.1080/11250005609438227

出版商:Taylor & Francis Group    

年代:1956

数据来源: Taylor

摘要:

CernaorEpinephelus sicanusis not a synonym ofE.orGarrupa nigritus, as was hitherto believed. The latter therefore, does not exist in the Mediterranean. It is doubtful ifE. sicanusreally is a valid species. In any case it is very close toE. caninusandE. goreensis; it may be identical to one of them.

ISSN:0373-4137    

DOI:10.1080/11250005609438228

出版商:Taylor & Francis Group    

年代:1956

数据来源: Taylor

摘要:

After making a traversal cut in the caudal region ofAllolobophora caliginosaandAllolobophora rosea, the two stumps, cephalic and caudal, give rise to regeneration by means of extensive partecipation of the epidermical epithelium.

ISSN:0373-4137    

DOI:10.1080/11250005609438229

出版商:Taylor & Francis Group    

年代:1956

数据来源: Taylor

ISSN:0373-4137    

DOI:10.1080/11250005609438230

出版商:Taylor & Francis Group    

年代:1956

数据来源: Taylor

摘要:

The author is describing, for the first time, accidental hermaphroditism in the hydroidCampanularia caliculata, wich is normally dioecious, and concerns single gonangia which bear both male and female gametes in varying proportion.

ISSN:0373-4137    

DOI:10.1080/11250005609438231

出版商:Taylor & Francis Group    

年代:1956

数据来源: Taylor