1886.] ON THE STRUCTURE OF THE OVUM IN DIPNOI. 505 
example, which is nearly paralleled by other specimens in the 
National Collection. ‘The skull, however, is characterized by the 
excessive reduction of the nasal bones, which is carried to a much 
greater extreme than in the typical specimen of Neotragus kirkii, 
Giinther (P. Z. S. 1880, p. 20). There are also other points of 
difference when the skulls are compared together. 
But as Neotragus kirkii is from nearly the same country, I think 
it would be hardly justifiable to name a second Neotragus from 
Somali-Land without a better series of materials to base it upon. I 
will therefore content myself with calling attention to their diver- 
gencies, and, as Mr. Phillips has empowered me so to do, with 
depositing his specimens in the British Museum to await further 
inquiries. 
From the discoveries made by Mr. Hagenbeck’s collector, Herr 
Menges’, and Messrs. James and Lort Phillips, it is quite evident 
that there is yet much interesting work to be done among the 
Mammalia in Somali-Land, and I trust that we shall soon receive 
additional specimens and further information concerning this inter- 
esting animal. 
December 7, 1886. 
Prof. Flower, LL.D., V.P.R.S., President, in the Chair. 
Prof, Bell exhibited and made some remarks on a specimen of 
Tenia fana, the smallest known human parasite, which had lately 
been obtained for the Museum of King’s College. 
The following papers were read :— 
1. Observations on the Development and Structure of the 
Ovum in the Dipnoi. By Frank H. Bepparp, M.A., 
F.R.S.E., Prosector to the Society, and Lecturer on 
Biology at Guy’s Hospital. 
[Received December 3, 1886.] 
(Plates LII.—LIV.) 
The present paper is the continuation of a research into the 
structure of the ovary in Protopterus, the main results of which have 
already appeared in the last number of the ‘ Proceedings.’ Besides 
being able to give a more complete account of the ovarian ova in Pro- 
topterus, I am also able to supplement this account with some few 
notes respecting the structures to be observed in the ovary of Cera- 
todus. ‘The opportunity of studying Ceratodus 1 owe to the kindness 
of Prof. Lankester and Prof. G. B. Howes. ‘The material was taken 
* Cf. Sclater, P. Z. 8. 1884, p. 538; Noack, Zool. Gart. xxvi. p. 172 et xxvii, 
p- 39; Kohl, Ann. d. k. k, naturhist. Hofmuseums, i. p. 75 (1886). 
ow} 
