366 1 I A MINI 



H. ornlis PSE., Araer. Journ. Conch, iv, p. 71, ])1. 7, f. 2 (animal),. 

 pi. 12, f. 20 (shell). 



II. APERTA Pease. PL 43 fig. 17. 



Shell thin, pellucid, smooth, ovate, imperforate, white, very finely 

 and irregularly striate longitudinally; outer lip slightly expanded 

 above; aperture narrow posteriorly, anteriorly dilated ; columella 

 deeply arched below, and strongly callus; callosity somewhat 

 reflexed, rather broad. Alt. 15, diam. 9 mill. 



Tahiti. 



H. aperta PSE., Am. Journ. Conch, iv, p. 72, pi. 12, f. 22. 



Approaches H. cymbalum Quoy, but more ovate, outer lip n>t 

 being so much expanded. 



H. SIMILLIMA Pease. PL 40, fig. 95 ; pi. 43, figs. 11, 12. 



Shell thin, fragile, pellucid, white, abbreviately oval, impe-rfor- 

 ate ; aperture narrow above, dilated below, columella arched ante- 

 riorly and callous ; lip slightly involute. Alt. 8, diam. 6 mill. 



Animal pale green, the portion seen through the shell darker, 

 everywhere conspicuously dotted with rich orange, with a t w >pt> 

 of purplish interspersed. Foot cream color, with close orange dots. 

 Posterior portion of the foot narrow, extending some distance beyinnl 

 tin- shell, and terminating in a .sharp point. ( 7'xe.). 



Tahiti. 



II. .-iniiUhii'i IV K.. Am. Journ. Touch, iv, p. 72, pi. 7, rig. 3 

 (animal), pi. 12, f. 21 (shell). M.\I:TI:NS. Donuin Bis.ni., p. ~t'2. 



If. iii</rnpn,ict<tta and 1L aim! /limn resemble each other closely in 

 both animal and shell. The latter species is much smaller and differs 

 somewhat in color, and especially in the shape of its foot, which N 

 constant 



H. ovnmi A nuoy A (iaimard. PL 28, figs. 31, 32. 



Shell ovate, fragile, white, slightly umbilicate, transversely >tri- 

 nt- .I in front, and with delicate longitudinal stri:-. 

 Alt. ;. diam. 4 lin. I 7. & G.). 



Ihnn<it<t t 



Bult.t ovoidea < v >. A- G., /ool. de 1'Astrol. ii, p. 348, pi. 2G, f. 17-1!' 

 \ Ad. nor Sowb.). 



