( 68 ) (Peclinibranchi.) 

 FAMILY II. BUCCINOJDA. 



GENERA. 



Tentacula elongating Eyes near the points 

 considerably. on the outer side of the 



tentacula. 



Tentacula moderate. Eves at the outer base. 



2 Long pointed tenia- Eyes towards the mid- 

 cula. die of the tentacula. 



A. Coistis. Lin. 



Trunk elongating con- 

 siderably ; operculum 

 placed obliquely on the 

 loot, narrow, too short 

 to close the mouth of the 

 shell; a long respiratory 

 tube. PI. IQ\ fig. 12. 



2. Cypiuea. (1) Lin. 



Mantle large enough to 

 curl up and envelope the 

 sii ell : foot thin ; no oper- 

 culum. PI. 16, fig. 11. 



3. Ovula. Brug. 



A. Tfrecf.ii um. Lam. 



5. Voj.uta. Lin. 



Shell terminated by a 

 notch, with projecting 

 and oblique folds on the 

 columella. PL 18, fig. 1,2. 



<7. Oliva, Brug. 



A tube ahove the 

 head for respiration. 



b. Voluta. 



An elongated trunk, 

 cylindrical and retrac- 

 tile, with small crook- 

 ed teelh; a respiratory 

 tuhe projecting ob- 

 liquely behind the 

 head ; foot very large ; 

 no operculum. PI. 18, 

 fig. 2. 



2 Pointed tentacula, 

 from a veil on the head. 



Eyes at the outer base. 



c, Cymbium. 



A very large foot; 2 Tentacula, from a veil Eyes on the veil outside 

 no operculum. PI. 18, on the head. the lentacula. 



fig. 1. 



(1) The mantle is sufficiently large to turn back upon the shell and envelope it ; 

 at a certain age it covers the shell with a layer of another colour, so that this differ 

 ence, added to the form assumed by the aperture, might cause the adult to b< 



taken for another species. V. p. 41. 



