摘要:

The W. P. Sladen collection at the Exeter Museum is described for the first time. An appraisal is given of Sladen's life and work, his library and the donation of the collection to Exeter Museum by Mrs Sladen. The immense zoological value of the collection should be recognized. There are more than 3800 specimens of recent echinoderms representing 224 genera and 425 species of world‐wide distribution. There are over 2000 fossil echinoderms and these represent at least 155 genera and 226 species. Some type‐specimens and figured specimens, previously thought to have been lost, have come to light. These, together with manyChallengerExpedition asteroid and crinoid specimens examined by Sladen and P. H. Carpenter, make this one of the most important echinoderm collections outside any National Institution. There are over 7000 microscopical foraminiferan, echinoderm and other preparations in the collection. The majority of these were left to Sladen by Drs W. B. and P. H. Carpenter. The foraminiferan slides, in particular, must be ranked with equal importance to the echinoderms. The Sladen library contains over 2200 specialist books and pap

ISSN:0024-4066    

DOI:10.1111/j.1095-8312.1974.tb00722.x

出版商:Blackwell Publishing Ltd    

年代:1974

数据来源: WILEY

摘要:

There are surface coats on the sporocytes and spores of some pteridophytes and bryophytes which will bind one or more of the stains generally used to demonstrate the presence of an acid mucopolysaccharide surface coat in animal cells, viz. Alcian blue, colloidal iron, lanthanum, thorium, silver, SO,‐coriphosphine and phosphotungstic acid. This suggests that the composition of the coat substances in the ferns and bryophytes agrees with that in animal cells. It has been found that thorium‐staining in the sporocyte and the coat of the young spore of one fern,Botrychium lunaria, can be abolished with neuraminidase, indicating that sialic acid is a principal component of these coats. The spore wall in the pteridophytes (and probably also in the bryophytes) is constructed within these mucopolysaccharide surface coats, and it is suggested that differences in wall form are attributable to qualitative, quantitative and functional differences of the co

ISSN:0024-4066    

DOI:10.1111/j.1095-8312.1974.tb00723.x

出版商:Blackwell Publishing Ltd    

年代:1974

数据来源: WILEY

摘要:

Twenty‐one specimens appear under the name ‘Lichen rangiferinus’ in the Linnaean Herbarium. Small fragments of these specimens have been subjected to chemical analysis for the first time using one or more of the following techniques: Lichen mass spectrometry, Ultraviolet spectrophotometry and Thin layer chromatography. The results, which have been stored in full on computer tape, are summarized and discussed in relation to the morphology and annotation of the lichens concerned. These studies have led to the selection of the specimen on sheet number 1273.240 as the lectotype ofLichen rangiferinusL. The fact that the chemical analysis of this specimen was carried out on less than 0.5 milligrams of thallus indicates the power of contemporary physicochemical methods in Herbarium studies of this n

ISSN:0024-4066    

DOI:10.1111/j.1095-8312.1974.tb00724.x

出版商:Blackwell Publishing Ltd    

年代:1974

数据来源: WILEY