152 THE ZOOLOGIST. 
Cuv. & Val.) is a peculiarly coloured variety of L. maculatus, Bloch; that 
Crenilabrus Baillenii, Couch, is C. melops, Cuv. & Val. Adult examples 
of Brill and Sole were exhibited, coloured on both sides, but in which the 
eyes were normal. Some Sprats were adverted to which had fully-developed 
ova in January this year, having been obtained off St. Ives. Dr. Day 
adduced evidence that the specimen of Ostracion quadricornis figured by 
Couch, had not been captured on the British coast near Mevagissey, as 
reported, but had been brought in salt by a sailor from a warmer climate. 
Some observations were also made by the author on the habits of the 
Thresher Shark in relation to Whales. 
Prof, P. Martin Duncan read a paper on some Sponges obtained among 
a mass of fistulose Coral from deep water (1095 fathoms) off the south coast 
of Spain, during the dredging expedition of H.M.S. ‘ Porcupine.’ One of 
the Sponges, apparently characteristically new, is described as a species of 
Leiodermatium, L. affine, and another belongs to the genus Aphrocallistes.— 
J. Murte. 
ZootocicaL Society oF Lonpon. 
February 1, 1880.—Prof. Frower, LL.D., F.R.S., President, in the 
chair. 
Mr. F. M. Balfour read a paper on the evolution of the placenta, and 
made some observations on the possibility of employing the characters of 
this organ in the classification of the Mammals. 
Mr. Sclater read notes on some Birds collected by Mr. E. F. im-Thurn 
in British Guiana, amongst which was an example of a new species of 
Agelaus, proposed to be called A. im-Thurni, after its discoverer. 
Mr. W. T. Blanford read an account of a collection of Reptiles and 
Frogs made at Singapore by Dr. W. B. Dennys. In this collection were 
two new species of Ophidians, which were named respectively Cylindrophis 
lineatus and Simotes Dennysi, and two new Frogs, which the author proposed 
to call Rana laticeps and Rhacophorus Dennyst. 
Mr. A. D. Bartlett read an account of a peculiar habit of the Darter, 
Plotus anhinga, in casting up parts of the epitbelial lining of the stomach, 
as observed by him in the specimen now living in the Society’s collection. 
A communication was read from Mr. A. Heneage Cocks, containing 
notes on the breeding of Otters, as observed by him in specimens living in 
his possession. 
‘The Secretary read a paper by the late Mr. Arthur O'Shaughnessy, 
containing an account of a large collection of Lizards made by Mr. C. Buckley 
in Ecuador. The collection was stated to be of great interest, both on 
account of the number of new species it contained and the fresh material it 
afforded for the study of species already known. Mr. O'Shaughnessy had 
