MOLLTJSCA or THE ' CHALLEISfGER ' EXPEDITION. 127 



vex. Suture somewhat oblique and distinct from the slight 

 rounding of the whorls. Mouth a roundish oval, pointed above 

 and guttered in front. Outer lip roundly arched throughout ; 

 its thin edge retreats very much above, is roundly prominent at 

 the periphery, and retreats toward the base, where it is very 

 patulous. Inner lip scarcely convex on the body ; it is slightly 

 concave on the short patulous-edged pillar. H. 0'19. B. 0'06. 

 Penultimate whorl, height 003. Tip of apex O'Ol. Mouth, height 

 0-06, breadth 0-03. 



This is a stouter form than E. gomphus, with shorter mouth, 

 blunter tip, and rounder whorls. Compared to the young of E. ste- 

 nosto}?ia, Jeffr., this is a broader form with shorter and less oblique 

 whorls, a much shorter and broader mouth, and a blunter tip. 



20. EULTMA AMELIA, n. Sp. (a/^/3\us, blunt.) 



St. 145. Dec. 27, 1873. Lat. 46° 43' S., long. 38° 4' 30" E. 

 Halfway between Marion Island and Prince Edward Island. 

 50-150 fms. Grrey sand. 



Shell. — Small, thin, translucent or transparent, a little cylin- 

 drical, slightly bent, with a blunt tip, nearly flat-sided whorls, 

 a very slight linear suture, and an oblong mouth. Sculpture. 

 There are some very obscure microscopic lines of growth and 

 spiral scratches. Colour glassy, weathering to translucent. Spire 

 narrow, slightly unsymmetrical, being a little bent to the right. 

 Whorls 6, short, flattened, and scarcely convex on the side ; the 

 last is somewhat long with a very blunt round base. Suture 

 very slight indeed. Mouth oval, pointed above. Outer lip 

 curved a little flatly above, but very roundly below ; its edge 

 retreats very much above and below, and is prominent at the 

 periphery. Inner lip forms a continuous very slightly concave 

 curve across the body and down the short pillar, at the point 

 of which it is slightly angulated at its junction with the base. 

 H. 0-125. B. 0047. Penultimate whorl, height 0-02. Tip of 

 apex 0-008. Mouth, height 0-04, breadth 0-026. 



This species, which is represented by only one specimen and a 

 fragment, is probably full grown. Compared to E. distorta, Desh., 

 this is a narrower shell, with a much blunter apex, a longer base. 

 a smaller mouth, and an outer lip less laterally prominent. 



21. EULIMA HEBES, U, Sp. 



St. 122. Sept. 10, 1873. Lat. 9° 5' S., long. 34° 50' W. Off 

 Pernambuco. 350 fms. Mud. 



10* 



