396 Zoological Society. 



bread and milk on the morning and evening of one day ; and with 

 equal portions of flesh on the morning and evening of the next day; 

 the quantity of food at each meal being the same as usual. On 

 Feb. 16, (after an interval of five weeks,) the animals were again 

 weighed. No. 1 weighed as before, and was in perfect health. 

 No. 2 had lost in weight lib.: it had been during the alteration in 

 its feeding much duller than usual. 



The result of this experiment is in favour of the continuance of 

 the plan hitherto pursued of feeding partially carnivorous animals 

 with each kind of food on each day, and not on alternate days. 



The exhibition of the new species oi Molliisca and Conchijcra col- 

 lected by Mr. Cuming, which had been commenced Feb. 28, was 

 resumed. The several shells exhibited were accompanied, as on 

 the former occasion, by characters and descriptions from the pens 

 of Mr. Broderip and Mr. G. B. Sowerby. 



The following new species were characterized, and are described 

 in the Proceedings of the Committee : Cancf.llaria pulchra, solida, 

 tuberculosa, hullata, Mitriformis, goniostoma, (an approximation, 

 Mr. Sowerby observes, to the shell named Delphinula trigonostoma 

 by Lamarck, which would be properly placed in the genus Cancel- 

 laria next to this species,) tessellata, Clavatula, ohcsa, brevis, (another 

 of those interesting species which form as it were the passage from 

 the tj'pical CanceLlaricc to the species which Lamarck has placed 

 among the Dclphinulce under the name of Detph. trigonostoma,) ri- 

 gida, Cassidijbrmis, ovata, acunlinata, Zi;<ccmo?V/c5, (distinguished from 

 Buccinum only by the two folds on the columella,^ indentata, hce- 

 mastoma, chrysostoma, gemmtdata, decussata, and Bulbulus ; ScA- 

 tAKiA Diadema, (a fluid secreted by the animal produces a bright 

 purple dj'e,); Cardita Cuvieri, tumida, and vai'ia ; Crassatella 

 Jindutafa and gibbosa ; Amfhidesma pulchrum ; Marginella Cy- 

 jncEola and Fr amentum } Chitoi<! piisillus, Grayii, Chiloensis, roseus, 

 dispar, rugulatus, Columbiensis, punctulatissimus , hirundinjformis , 

 IcevigatuSy and arliculatus ; Cyclostoma Jlavuvt, and Stilifek 

 (new genus) astericoki and stihulatus. 



April 1 0. — A Report from Devereux Fuller, the Head Keeper, was 

 read. It was communicated to the Committee by the President. 



It stated that the period of gestation of the Puma, Fclis concolor, 

 L., had been ascertained to be 96 or 97 days, the female in the So- 

 ciety's Menagerie having admitted the male on Dec. 28, and brought 

 forth on the night of April '2, two young. The ground-colour of 

 these is of a paler fawn than that of either of the parents, and they 

 are deeply spotted, as was noticed on the former occasion (Phil. 

 Mag. and Annals, N.S., vol. xi. p. 1390- The eyelids of one of 

 them were partially unclosed on April 9. The mother, whose tem- 

 per was always mild, has since become remarkably gentle, purring 

 when the keeper goes into her den, and allowing her young ones to 

 be handled and carried about without appearing to be annoyed by 

 such treatment. The young, on the contrary, were when first born 

 extremely fierce, hissing and scratching %vith all their might ; they 

 have, however, since become better tempered, though they are still 



