296 MELANIINil^, 



This genus comprises the ovate forms of Melaniince 

 wliich arc not spinose ; the head of the animal is fm*- 

 nishcd with a very broad muzzle, and the margin of the 

 mantle is thickened and crenate. 



Sjiecies of Melanella. 



afra, Lig. Hollaudri, Fer. 



crassa, F. d. Busch. siccata, V. d. Busch. 



glans, V. d. Busch. zonata, V. d. Busch. 



Sub-gen. SEBMYLA, H. and A. Adams. 



Shell raitriform ; whorls longitudinally plicate, the last trans- 

 versely sulcate anteriorly ; outer lip siuuuted in the middle. 



harpula, Dkr. semicostata, Phil. 



mitra, Dkr. tornatella, Lea. 



nana, Lea. 



Genus MELANOIDES, Olivier. 



Operculum subcircular, subspiral, of few rapidly-en- 

 larging whorls. 



Shell subulate, solid, whorls often nodulous or rugose ; 

 aperture subcircular, produced in front ; inner lip some- 

 what callous ; outer lip sinuated, thickened, dilated, and 

 produced anteriorly. 



E.v. M. Indica, Eydoii.v, pi. 81, fig. 5. Operculum, 

 M. glaphyra, Morelci, fig. 5, a, 5, h. Shell, M. aspera, 

 Lamarck, fig. 5, c. 



The form of the aperture in this genus is rounder 

 than in Mclamia, the inner lip is thickened, the whorls 

 are nodose and striated, and the operculum is subcir- 

 cular and of few whorls. 



