56 GENUS BU COIN U M . 



56. BUCCINUM SEPIMENTUM, RANG. The Partitioned Buc- 



Cinum. / t/' n o r 



&M^fa&&ft 



(Collect. MASS.) RANG, Magasin de Zoologie, 1832, pi. 18. 

 PI. XVIII, %. 66. 



B. testa ovata, conica, ventricosiuscula, solida, Isevigata, ccerulescente : 

 singulis anfractibus cinguliferis, ultimo bicingulifero ; epidermi virescente ; 

 spira acuta ; apertura ovata, albescente, elongata ; columella arcuata, 

 callosft. 



Shell ovate, conical, slightly ventricose, attenuated at sum- 

 mit and base, pretty solid, nearly smooth ; general color, of a 

 bluish ash, ornamented with a deeper band upon each whirl, 

 and upon the lowest, with two others, distant, and more ob- 

 vious ; epidermis greenish ; spire pointed, composed of five or 

 six distinct, convex whirls ; the lowest, much larger than all 

 the others together, presenting at the base a pretty deep de- 

 current suture. The aperture is whitish, ovate, elongated, 

 terminated at the base by a very oblique emargination, and 

 above by a canal formed by the prolongation, upon the colu- 

 mella, of a callosity which becomes there a thin sharp plate : 

 this plate presents the appearance of a partition extending to- 

 wards the left lip ; the right lip is much elongated, thin and 

 sharp. Columella arcuated, covered by a callosity which ex- 

 tends a little upon the body of the shell ; from the middle 

 arises a ridge which descends obliquely nearly to the base of 

 the right lip, where it terminates within by a small elevation. 



Length 8 lines. Width 3 lines. 



Inhabits the Bay of St. Anthony, Prince's Isle, where it is 

 found at great depths. 



M. Rang, a distinguished conchologist, first made known this 

 singular shell, which he had collected in his voyage of circum- 

 navigation. It appears to be closely allied to the Purpurae, and 

 particularly to the division MONOCEROS, which it approaches by 

 the oblique ridge at its base. 



