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. 

 Hob. Mazatlan ; 1 young sp. off Spondylus ; L'pool Col. 



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. 

 Sab. Mazatlan ; 1 sp. off Spondylus ; L'pool Col. 



GENUS ACLIS, Loven. 



Ind. Moll. Scand. 1846, p. 16. PJiil. Handb. Condi, p. 195. 

 Forbes fy Hani. J3r. Moll. vol. iii. p. 217. H. $ A. Ad. 

 Gen. i. 234. 



Ebala, Gray. Alvania, Searlcs Wood, non Risso. 

 In this genus are deposited smooth or slightly sculptured 



shells ; with more or less numerous whirls, tumid or loosely 



spiral, the apex sinistral, and the mouth round or oval, without 



plait. 



545. ACLIS FUSIFOEMIS, n. s. 



A. t. tenui, albidd, effusd, elongatd ; vertice nucleoso anfr. ii. 

 planatis, subtumentibus, dcclivi ; anfr. nonnalibus parum ex- 

 curvatis, parum attingentibus, valde elongatis ; striulis minimis 

 spiralibus, interstitiis minutissime decussatis ; aperturd 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, lot. '022, div. 10. 

 Hab Mazatlan ; extremely rare, on Chama ; L'pool Col. 



Tablet 2016 contains one specimen and the fragment. 



