BULLINA. 



GENERIC CHARACTER. 



Shell cylindrical-oval, convolute, imperforate ; spire ele- 

 vated, short ; aperture longitudinal, elongated, much nar- 

 rowed above ; labrum simple, gradually much more 

 prominent in the middle than at the extremities, meeting 

 the preceding volution with a deeply reentering angle ; 

 at base widely and regularly rounded ; columella with a 

 slight fold. 



OBSERVATIONS. 



Blainville quotes Ferussac for this genus, which, per- 

 haps inadvertantly, he calls Buline, with one 1, instead of 

 Bullina as the latter author writes the word. He has, 

 however, considerably limited the group by assigning to it 

 the character of "fortement involvecs, spire visible et sail- 

 lante a I'exterieur ; I'overture tres etroite en arriere," which 

 excludes some of the species comprehended by Ferussac. 

 He also places it as a subgenus under Bulla, with "la Bulle, 

 la Jonkaire," of Bastcrot, as its type. The animal differs 

 from those of the genera Bulla, Scaphander and Atys, by 

 having two distinct tentacula, and from Bullea by being 

 included within the shell. The shell differs by its promi- 

 nent spire, which in those genera, when it exists at all, is 

 iimbilicated. 



In its general form and hal)it it has much roseml)lance 

 pi. m. 



