504 Zoological Society. 



Mr. Waterhouse observed, that the animal dissected by Prof. Owen 

 had been presented to the Society by the Earl of Derby, and had 

 lived for some time in the Menagerie. Soon after its death he had 

 carefully examined it with a view to ascertain whether it possessed 

 cheek-pouches. Of these he found not the slightest trace. 



Mr. Lovell Reeve then read his " Description of a new species of 

 Corbis, a genus of acephalous moUusks of the family Nymphacea." 



CoRBis SovERBii. Co7^b. testd transversd, tumidd, gibhosd, lacted 

 aut rubella ; radiis roseis obsoletis ab umbonibus ad marginem di- 

 ver gentibus ; lamellis transversis elevatis, remotiusculis, utrinque 

 serratis, antice valdius ; striis numerosis radiantibus, intra lamel- 

 las; margine subcrasso,profundecrenulato ; umbonibus longitudi- 

 nalibus, minutis, opposite incurvis ; lunuld parvd, subcordatd. 



Long. 2f ; lat. 3^ poll. Mus. Stainforth, Norris. 



Junior, testd depressiusculd, radiis roseis longitudinalibus plus mi- 

 nusve distinctis. 



Long. 1§ ; lat. 1 J poll. Mus. Stainforth. 



Hab. ad insulam Negros, Philippinarum. 



Found in loose coral sand on the reefs at lov/ w^ater. 



" I have much pleasure in dedicating this beautiful species of Cor- 

 bis, figures of which will appear in the third part of my ' Concho- 

 logia Systematica' (pi. Iviii.), to that industrious author and artist 

 Mr. G. B. Sowerby, jun. Only one recent species of this character- 

 istic genus of Nymphacea has been hitherto known ; it is therefore 

 gratifying to be able to make so valuable an addition. The Corbis 

 Soverbii differs materially from the Corbis fimbriata : instead of the 

 closely fimbriated character of the outer surface, the valves are crossed 

 transversely with distinct elevated lamellar ridges, between which 

 there are numerous striae running in a longitudinal direction. It is 

 also characterized by being strongly tinged with pink, particularly 

 in an early stage of growth, when the valves are vividly painted with 

 deep-coloured rays passing from the umbones to the margin : as the 

 shell increases in age it increases in convexity, the lamellae become 

 thickened, and the rays obsolete. This interesting species more 

 nearly resembles the Corbis lamellosa of Lamarck, known only in a 

 fossil state ; it differs, however, in having the valves much more 

 gibbous or ventricose, and in the lamellae being strongly serrated on 

 the anterior side. Some little time since I was fortunate enough to 

 obtain, at a public auction at Rotterdam, four specimens of the 

 C. Soverbii, two in the young and two in the adult state. At this 

 sale I obtained the beautiful new species of the glassy Nautilus de- 

 scribed in the ' Annals of Nat. Hist.' vol. ix. p. 140. 



•* Mr. Cuming has kindly furnished me with the above locality, 

 having met with a few specimens of the Corbis Soverbii in his re- 

 searches amongst the Philippines, at the island of Negros." 



The next paper read was from Mr. Stutchbury, and is entitled, 

 *' Description of a new Sponge from Barbadoes." 



" The Museum of the Bristol Institution having lately become pos- 



