226 THE ZOOLOGIST. 
species. Prof. Bell, after a full description, observed that, with more or less 
reason, some naturalists have looked on the possession of other than five rays 
as a character of some specific value among the Asterida and Ophiurida, and 
have considered that, on account of its greater rarity among the latter, it is 
of greater value as a mark of distinction; but such a view must be taken 
with considerable limitation. ‘The pentamerous arrangement of parts in 
the regular Echinoidea is only disturbed in one example; information and 
specimens are, however, at hand to show how this may have happened. 
The rarity of any divergence from this five-part division, in face of the 
numerous variations which occur in other Echinodermata, will doubtless 
become more and more important as a factor in determining the genealogical 
history of the group. 
A series of microscopical sections of pearls, exhibiting many irregu- 
larities in structural detail, were shown by Dr. Murie, and their several 
peculiarities explained.—J. Murte. 
ZooLoaicaL Society oF Lonpon. 
March 16, 1880.—Dr. A. Guntuer, F.R.S., Vice-President, in the 
chair. 
The Secretary read a report on the additions that had been made to 
the Society's Menagerie during the month of February, and called special 
attention to several novelties, amongst which were two female Thars (Capra 
jemlaica), mother and young, presented by H.R.H. the Prince of Wales on 
the 5th February; and two Burrhel Wild Sheep (Ovis burrhel), purchased 
February 19th. 
Mr. W. K. Parker exhibited and made remarks on the eggs and 
embryos of some Crocodiles (Crocodilus palustris), obtained in Ceylon by 
Dr. W. R. Kynsey, Principal Medical Officer of Colombo. 
Mr. W. A. Forbes read a paper on some points in the anatomy of the 
Sumatran Rhinoceros. 
Mr. Edward R. Alston exhibited and made remarks on a coloured 
drawing of an adolescent specimen of Tapirus Dowi, now in the Paris 
Museum. 
Mr. Alston also exhibited a specimen of a remarkable and little-known 
Australian Marsupial, Antechiiiomys lanigera (Gould). 
A communication was read from Mr. L. Taczanowski, giving the 
descriptions of a collection of birds made in Northern Peru by Mr. Stolz- 
mann during the last months of 1878 and the first half of 1879. Amongst 
them were examples of three species believed to be new to science, and 
proposed to be called Turdus maranonicus, Arremon nigriceps, and Colaptes 
Stolzmannt. 
