nui.LiA. II 



in vMrious diroctions; it is caujiht by hailino: linos with Itits of 

 rtesh. The oeniis is oriental, mostly So. African in distri'bntion, 

 and reminds one of the Arctic genus Volutharpa (vol. iii, j). 107). 



TT. and A. Adams separate a genus Pseiidosh-ombus on account 

 of the want of the sutural band of enamel, and the foot of the 

 'animal being simple instead of bifid behind; but as in Nassa, 

 the difference in the animal is not certainly to be regarded as 

 generic; and as to the shell, there is no sharp line of division 

 between species with and those without enamelled sutures — the 

 globose species generally showing the most of it and the 

 narrower ones less. Nevertheless it will be convenient to group 

 together the narrow species as a subgenus. 



In Woodward's "Manual of the Mollusca," Bullia is erro- 

 neously made a synonym of Anaulax, Roissj-, a fossil form of 

 Ancillaria. 



Typical. 



B. L^vissiMA, Gmel. PI. 5, lig. 59. 



Yellowish Avhite to brownish red ; smooth and polished. 



Length, 2-5-3 inches. 



Cape of Good Hope. 

 B. GLOBULOSA, Kicncr. PI. 5, fig. 60. 



Spire shorter, whorls slightly contracted above the middle, 

 suture but slightly, or not at all enamelled. Length, 2-5 inches. 



Habitat unknown. 



I doubt whether this is more than a variety of B. laevisaima. 



B. DEFORMis, King. PI. 5, fig. (51. 



Yellowish brown, obscurely brown banded. 

 Length, 22-33 mill. 



Mouth of the Rio de la Plata ; Rio Nefjro, South Amcricd. 



B. TENUIS, PI. 5, tig. <)2. 



Thin, 3'ellowish white, one or two revolving grooves just 

 below the suture and a number on the lower half of the body 



Avhorl. Length, 1*75 inches. 



Habitat unknown. 

 B. CALLOSA, Gray. PI. 5. fig. 63. 



Yellow'ish gray, sutural and columellar callosities generally 



chestnut-brown. Length, 1 •25-1*5 inches. 



Habitat unknown. 



