146 
or refiected, without teeth or folds but furnished with a 
small oblique gibbosity in the middle. 0,30...0,15. 
Exmouth. 
A. Hererociita.—Votuta H. Laskey. Wern. 
Mem. 1. p. 398. t. 8. f. 1,2.—Actron H. F. p. 337. 
—Glossy, white, veined like ivory in a longitudinal 
direction, with eight or nine reversed whorls which taper 
slightly to an obtuse point, the body whorl occupying 
two thirds of the length; aperture narrow not quite half 
the length of the shell ; pillar with one plait. 7...0,085. 
Dunbar. 
Grenus.—TRUNCATELLA. Lowe. 
Turrited, the adult eylindrical decollated or obtusely 
truncated ; whorls well defined, either smooth or 
with longitudinal ribs ; aperture oval and short ; 
the peritreme contiguous ; lip simple, no epidermis. 
T. Montacut. Lowe. in Z. J. 5. p. 303.—TuRBOo 
Trunoata. Mont. p. 300. ¢. 10. f. 7.—Turt. D. no. 
65.—TurrRITELLA T. F.p.3803.—Cylindrical, smooth, 
glossy, pellucid, thin, horn-colored, with four spires ; 
the apex abrupt as if broken; whorls much raised, - 
the suture deep ; aperture suborbicular, slightly mar- 
ginated, refiecting a little on the pillar lip—variety 
(rare) longitudinally striated or marked with cre- 
nule in the sutures. 0,20...0,07.—Young, Turpo 
