1875.] Presents. 155 



and as they were all covered by the epithelial lining of the amnion, they 

 were apparently developed between it and the layer of allantois which 

 covered its outer surface. The plates were obviously composed of cells 

 the nuclei of which were distinct ; but the toughness of the tissue, due 

 probably to the prolonged action of the spirit in which the specimen had 

 been preserved, rendered it difficult to isolate them. In position and 

 structure these plates apparently corresponded to the amniotic corpuscles 

 which I have described in Orca gladiator (Trans. Boy. Soc. Edinburgh, 

 1871). 



The non-gravid uterine cornu was enlarged and contained two masses 

 (one the size of a walnut, the other of a filbert) connected together by 

 an intermediate neck. When examined microscopically they were seen 

 to contain tubular glands and blood-vessels, lying in a richly corpuscu- 

 lated connective tissue. These masses were evidently the greatly hyper- 

 trophied mucosa, which had become thickened in sympathy with the 

 changes in the gravid cornu. There was no extension of the foetal mem- 

 branes into this cornu, and its cavity seemed as if almost obliterated by 

 the great hypertrophy of the mucous wall. 



Hyraoo agrees, therefore, with Felis, not only in the form and structure 

 of the placenta, but in the presence of a large allantoic sac. It differs, 

 however, in the condition of the umbilical vesicle, which in Felis persists 

 during utero-gestation, but in Hyrax disappears apparently at an early 

 period. 



The Society then adjourned over the Christmas Eecess, to Thursday, 

 January 6, 1876. 



Presents received, December 9, 1875. 

 Transactions. 



Calcutta : — Asiatic Society of Bengal. Journal, 1874. Part 1. No. 4, 



Part 2. No. 4; 1875. Parti. No. 1. Part 2. No. 1. 8vo. Calcutta. 



Extra Number. 8vo. Hertford 1875. Proceedings, 1874. No. 10 ; 



1875. No. 1-6. 8vo. The Society. 



Newcastle-upon-Tyne : — North of England Institute of Mining and 



Mechanical Engineers. Transactions. Yol. XXIV. 8vo. 1875. 



The Institute. 

 Eome : — Accademia Pontificia de' Nuovi Lincei. Atti. Anno 28. 



Sess. 4-6. 4to. Roma 1875. The Academy. 



Turin : — E. Accademia delle Scienze. Atti. Vol. X. Disp. 1-8. 8vo. 



Torino 1874-75. The Academy. 



Yokohama : — Asiatic Society of Japan. Transactions. Vol. III. 



Part 1. 8vo. 1875. The Society. 



m2 



