189 



tuse, slightly elevated, nearly terminal ; color dirty white ; liga- 

 ment mostly external, lines of growth coarse, and corrugated ; in- 

 terior white, with a stain of purple on the posterior and hinge mar- 

 gin ; three unequal cardinal teeth in each valve ; a strong, project- 

 ing, triangular, flat tooth in the left valve, with a corresponding 

 disunion in the right. Width, 1 3-5; height, 9-10; depth, 2-5 

 inch. Hab. Zanzibar. 



Pleurotoma insculpta. Shell slender, turretted, surface can- 

 cellated ; whorls eight, angular ; suture impressed, with an ap- 

 proximate, raised, revolving line ; aperture about one third the 

 length of the shell ; fissure distinct, broad ; canal short and wide ; 

 color white, excepting two or three of the upper whorls, which are 

 reddish brown. Length, 7-10; width, 1-4 inch. Hab. Key West, 

 Florida. 



Schizosto3Ia cylindracea. Shell nearly smooth, cylindrical, 

 thick, with slight revolving undulations ; epidermis olivaceous ; 

 spire ovate-conic, eroded ; whorls three or four, flattened, shoul- 

 dered ; suture distinct, aperture oval ; fissure deep and wide. Plab. 

 Warrior River, Alabama. 



Schizostoma cuRTA. Shell short, sub-globose, smooth, thick and 

 solid ; epidermis dark green, with two or three revolving bands of 

 a darker color ; spire short, obtuse, eroded ; whorls three or four, 

 flattened in the middle ; suture superficial ; aperture pear-shaped ; 

 fissure distinct. Hab. Warrior River, Alabama. 



Dr. Gould added, that he regarded the Pupa costulata as 

 being the Helix harpa of Say, — the only Helix that author 

 described which had not been previously re-discovered. 

 Mr. Say found his specimen in the Northwest Territory ; 

 and it is not a little singular that the shell should come to 

 light again at so wide a distance in the northeast. He had 

 also received the Cypricardia nodulosa from Mr. Conrad, un- 

 der the name of Carditamera Floridana. 



Dr. Storer mentioned the formation of a Natural History 

 Society at Portland, and suggested the donation of our 

 Journal and Proceedings. The Secretary was directed to 

 correspond on the subject. 



The President communicated a letter from the Royal Acad- 

 emy of Literature and Science of Munich, offering an ex- 



