ATYS.—Prate IIL. 
the middle, umbilicated at both ends; aperture 
very narrow posteriorly, expanded anteriorly ; 
columella thin, rather straight. 
A. Apams. In Sowerby’s Thesaurus Bulla, 97, fig. 128. 
Hah, China Sea. 
The most decidedly pyriform of all the species. 
Species 17. (Fig. a, 6, Mus. Cuming, in Mus. Brit.) 
Atys ovuLata. At. testd, parvd, alba, cylindricd, 
leevigatd, subpellucidd, recta; apice subtruncato, 
umbilicato ; aperturdé angustatd; columella tenui, 
rectiusculd, acuminata. 
Ture ovai Atys. Shell small, white, cylindrical, smooth, 
apex subtruncated, um- 
narrowed; columella thin, 
subpellucid, straight ; 
bilicated, aperture 
rather straight, acuminated. 
Broccut, p. 277, t. 1, f. 8. 
Hab. Sicily. 

Species 18. (Mus. Brit.) 
Arys HIEMALIS. At. test minutd, hyalina, globosd, 
tenuiter longitudinaliter striata; aperturd superné 
angustata, inferné valdé expansd ; labio externo 
superne sinuosim producto, ad apicem longé re- 
trorsim disjuncto ; columella recta, ad terminum 
acuminata. 
THe winter Atys. Shell minute, hyaline, globose, 
finely longitudinally striated; aperture narrowed 
above, much expanded below; outer lip sinu- 
ously produced above, separated far back at 
the apex; columella straight, acuminated at the 
end. 
Cournoy, Boston Journ. of Nat. Hist. v. ii. p. 180, 
ps4, te Oe 
Hab. Massachusetts Bay, United States. 
This very globose little shell is glassy in texture, 
and very curiously formed. 
