12 



Scicena hololepidota, Otolithus cequidens, Chrysophris globiceps, 

 Chr. gibbiceps, and Pagrus laniarius, of MM. Cuvier and Valen- 

 ciennes ; an undetermined species of Dentex ; a fish allied to 

 Oblada, Cuv., and apparently the type of a new genus ; a new 

 species of Scomber, Cuv.; a Lichia? ; two species of Clinus, Cuv., 

 one of which is probably the Clinus Capensis ; an undeseribed 

 species of Bagrus, Cuv., of the section distinguished in the " llegne 

 Animal " by having six cirri and a rounded and smooth head ; a 

 species of Scy Ilium, Cuv., probably new to science ; and a second 

 species of the genus Rhina, Schn., which deviates from the type 

 by a slight production of the front of the head, and thus makes an 

 approach to Rhinobates, Schn. 



Mr. Vigors exhibited several species of Humming-birds from 

 the collection of Mr. John Gould, one of which, previously unde- 

 scribed, had been dedicated to Mr. George Loddiges, F.L.S., &c. 

 It approaches most nearly to the Trochilus Lalandei, Vieill., but may 

 be distinguished from that bird (in which the crest is brilliantly 

 green and the throat and breast rich blue,) by the following cha- 

 racters : 



Trochilus Loddigesii, Gould. Troch. cristd elongatd, purpu- 

 reo-lilacind ; guld crissoque saturate cinereis ; pectore abdomine- 

 que fiigris. 



This species is from Rio Grande. 



Mr. Loddiges stated that both species belonged to a genus which 

 he had distinguished among the Trochilidce by the name of Cephal- 

 lepis ; and promised to bring before the Committee, at an early 

 meeting, the results of his researches on the Trochilidce generally. 



At the request of the Chairman, Mr. Martin reported the diseased 

 appearances noticed on the examination of the Beaver which re- 

 cently died in the Society's Menagerie. They were stated to be 

 such as result from great and universal inflammation. On exami- 

 ning the stomach, its lining membrane was found covered with a 

 blush of inflammation, prevailing more especially about its cardiac 

 portion, where a number of dark-coloured spots and patches indi- 

 cated the existence of gangrene. Both the stomach and the colon 

 contained undissolved fibres of bark in considerable quantity, the 

 function of digestion having been for some time past necessarily de- 

 ranged. Along the course of the small intestines, traces of high 

 arterial action were still presented ; in the large intestines the traces 

 of inflammation were more obscure. The pericardium was highly 

 inflamed, its inner surface presenting a granulated appearance. The 

 heart also, as well as the lungs, gave evidence of having partaken 

 in the general disease. Much disease existed about the lower jaw, 

 which may probably have been the primary cause of all the 

 mischief, as it must have existed for several months, and necessarily 

 have produced a continued state of irritation in the system. The 

 alveolar processes of the lower jaw, embracing the incisor teeth, 

 were destroyed by caries, and the teeth themselves had fallen out. 



