100 PROF. E. RAY LANKESTER ON THE [Feb. 5, 



February 5, 1907. 



His Grace The Duke of Bedford, K.G., President, 

 in the Chair. 



Mr. F. Martin Duncan, by pennission of the Charles Urban 

 Trading Co., Ltd., gave a cinematograph exhibition of animals in 

 the Society's Gardens and other zoological subjects, chiefly the 

 life-history of Insects. 



Mr. Oldfield Thomas, F.R.S., F.Z.S., exhibited a collection of 

 Mammals and Birds from the Islands of Saghalien and Hokkaido, 

 N. Japan, made by Mr. Malcolm P. Anderson in carrying out the 

 Duke of Bedford's Exploration of Eastern Asia. Mr. Thomas 

 proposed to give a full account of the Mammals on a later 

 occasion. 



Dr. W. T. Caiman, F.Z.S., read a paper entitled " On new or 

 Bare Crustacea of the Order Cumacea from the Collection of the 

 Copenhagen Museum. Part I. The families Bodotriidoi, Vaun- 

 tompsoniidce, and Letoconidce." 



This paper will be published entire in the ' Transactions.' 



The following papers were read : — 



1. The Origin of the Lateral Horns o£ the Giraffe in Foetal 

 Life on the Area of the Parietal Bones. By E. Raj 

 Lankester, M.A., D.So., LL.D., F.R.S.. F.Z.S., 

 Director of the Natural History Departments of the 

 British Museum. 



[Received February 5, 1907.] 



(Text-figures 24-36.) 



A remai-kable and wide difference between the Giraffe and the 

 Ok"ipi is constituted by the position and relation of the lateral 

 horns in these two animals in regard to the bones of the skull. 

 As I pointed out in my memoir on the Okapi read in 1901 (Trans. 

 Zool. Soc. vol. xvi. p. 279), the bony horn-cone of that animal is 

 attached to the frontal bone, and it is the frontal bone which is 

 raised into a boss for its support, whilst even in the hornless skulls 

 supposed to be those of the female these frontal bosses are present. 

 On the other hand, in the young Giraffe the main axis of the 

 lateral "ossicone"* falls within the area of the parietal bone 



* I use the term " ossicone " in the present paper for the independent^ ossifying 

 hony cones which are found in Okapi and Giraffe on the frontal and parietal areas 

 and in the Griratfe also in a median position. In my memoir of 1901 I spoke of such 

 structures as " ossicusps," a term which I now wish to apply more generally, 

 reserving the term " ossicone " for the peculiar separately ossifying cones of the 

 Giraffidse. 



