1886.] ON THE STRUCTURE OF THE OVUM IN DIPNOI. 505 



example, which is nearly paralleled by other specimeDS 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 iu the typical specimen of Neotragus kirkii, 

 Giiuther (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, iu the Chair. 



Prof. Bell exhibited and made some remarks on a specimen of 

 Tania rana, 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 tlie 

 Ovum in the Dipnoi. By Frank. E. Beddard, M.A., 

 F.R.S.E.j Prosector to the Society, and Lecturer on 

 Biology at Guy^s Hospital. 



[Eeceived December 3, 1886.] 



(Plates LIL-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 

 nctes respecting the structures to be observed in the ovary of C'era- 

 todiis. The opjiortunity of studying Ceratodus 1 owe to the kindness 

 of Prof. Lankester and Prof. G. B. Howes. The material was taken 



1 Cf. Sclater, P. Z. S. 1884, p. 538 ; Noack, Zool. Gart. xxtI. p. 172 et xxvii. 

 p. 39; Kohl, Ann. d. k. k. naturhist. Hofmuseums, i. p. 76 (188(5). 



