Abstract

It was known to Aristotle, some 350 years B.C., that of two common "Hounds" of the Mediterranean, the embryos of one were developed by the medium of a placenta produced in the uterus, and that the embryos of the other were developed without such placenta. The condition in the former species, Mustelus laevis, is thus described by Balfour :- "The vascular surface of the yolk-sack becomes raised into a number of folds, which fit into corresponding depressions in the vascular walls of the uterus. The yolk-sack becomes in this way firmly attached to the walls of the uterus, and the two together constitute a kind of placenta"

 
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Bibliographic Data

Short Form
Waite, 1902, Rec. Aust. Mus. 4(5): 175–178
Author
Edgar R. Waite
Year
1902
Title
Studies in Australian sharks. No. 2
Serial Title
Records of the Australian Museum
Volume
4
Issue
5
Start Page
175
End Page
178
DOI
10.3853/j.0067-1975.4.1902.1093
Language
English
Date Published
06 January 1902
Cover Date
06 January 1902
ISSN
0067-1975
CODEN
RAUMAJ
Publisher
The Australian Museum
Place Published
Sydney, Australia
Subjects
FISHES
Digitized
07 November 2008
Available Online
19 December 2008
Reference Number
1093
EndNote
/Uploads/Journals/16753/1093.enw
Title Page
/Uploads/Journals/16753/1093.pdf
File size: 93kB
Complete Work
/Uploads/Journals/16753/1093_complete.pdf
File size: 421kB