MAZATLAN UNIVALVES 437 
543. EULIMELLA — » sp. ind. (c.) 
Tablet 2014 contains an extremely young shell of a large 
species. It has only one normal whirl, besides the sunken but 
tumid sinistral apex, and measures °026 by ‘02. 
Hab.—Mazatlan ; 1 young sp. off Spondylus; L’pool Ool. 
544, ——-——- —— » sp. ind. 
Tablet 2015 contains a singular little shell, *024 by °015, the 
fry of a large species, the genus even of which cannot be deter- 
mined without a series. It has a very large mammillated apex 
of one whirl, set slanting on the next, which by its subquadrate 
aperture and angulated umbilicus resembles Niso. 
Hab.—Mazatlan ; 1 sp. off Spondylus; Z’pool Col. 
Genus ACLIS, Lovén. 
Ind. Moll. Scand. 1846, p. 16.— Phil. Handb. Conch. p. 195.— 
Forbes § Hanl. Br. Moll vol, mi. p..217.—H. g A. Age 
Gen. 1. 234. 
Ebala, Gray.—Alvania, Searles Wood, non Risso. 
In this genus are deposited smooth or slightly sculpiinad 
shells; with more or less numerous whirls, tumid or loosely 
spiral, the apex sinistral, and the mouth round or oval, without 
plait. 
545. ACLIS FUSIFORMIS, 7.5. #@ 
A. t. tenwi, albidd, effusd, elongata ; vertice nucleoso anfr. ii. 
planatis, subtumentibus, declivi; anfr. normalibus parum ea- 
curvatis, parum attingentibus, valde elongatis ; striulis minimis 
spiralibus, interstitiis minutissime decussatis ; aperturéd ovali, 
peritremati continuo, labro acuto. 
The species is described from four very small shells, some- 
what resembling Rissoa proxima, but much more effuse. If 
a large fragment, which has the same sculpture, belongs to 
the same species, it must be a very long and slender shell 
when perfect. The largest of the four, with four normal whirls, 
measures long. ‘065, long. spir. *042, lat. *022, div. 10°. 
Hab.—Mazatlan ; extremely rare, on Chama; LZ’pool Col. 
Tablet 2016 contains one specimen and the fragment. 
