498 THE VOYAGE OF H.M.S. CHALLENGER. 



pear-shaped mouth. Sculpture : Longitudinals — there are extremely faint lines of growth, 

 with here and there one slightly stronger than the rest. Spirals — the whole surface is 

 sharply, irregularly, microscopically scratched. Colour hyaline white. Spire sub- 

 cylindrical and very little conical, the increase of the whorls being slight, and being 

 greater proportionally in length than in breadth. Apex : the spire passes on into the 

 slightly elongated embryonic tip, which is largish, consisting of 3 very fine discoidal 

 whorls which are turned right up on their side. Whorls (besides those of the embryo) 

 3^ ; they are long, convex, and very loosely coiled. Suture linear, contracted, oblique. 

 Mouth long, pear-shaped, narrowing gradually upwards, but at the top suddenly con- 

 tracted. Outer lip at the top bent in towards the axis, then very slightly curved, 

 rounded and very patulous across the base. Inner lip thick, defined, quite straight, 

 and very long across the body ; the pillar is extremely short ; the lip-edge here is 

 rounded, slightly prominent, and at its junction with the base obtusely angulated, with a 

 very minute furrow behind it. H. 0-085 in. B. 0023. Mouth, height 0-023, breadth 

 0-017. 



This is a very small species, but, from its proportions and the completeness of the mouth, seem- 

 ingly full-grown. Its form recalls that of some of the Clionellas. 



5. Eulimella coacta, n. sp. (PL XXXIII. fig. 4). 



Station 186. September 8, 1874. Lat. 10° 30' S., long. 142° 18' E. Wednesday 

 Island, Cape York, North-east Australia. 8 fathoms. Coral mud. 



Shell— Strongish, acicular, conical, compact, 1 with a smallish half-turned-over turbinate 

 sinistral tip, slightly convex short whorls, barely impressed submarginated suture, short 

 round base, and very small roundish mouth. Sculpture : none but faint lines of growth 

 and microscopic sharp spiral scratches. Colour glossy ivory white. Spire very long, 

 conical. Apex : the spire passes on into the round embryonic tip, consisting of 1\ compact, 

 turbinated, not small whorls, which are turned right over on their side. Wlwrls (besides 

 those of the embryo) 8 to 9 ; they are short and narrow, compact, of very slow increase, 

 slightly convex below and flat-sided above round the top, which forms a slight subsutural 

 border. Suture very slightly contracted, submarginated below, rather oblique. Mouth 

 small, roundly oval, pointed above, oblique. Outer lip direct and bent in above, round 

 and patulous on the base. Inner lip straight and defined across the body ; the pillar is 

 very short, and the lip-edge here is sharp, prominent, and at its junction with the base 

 concave, with a very minute furrow behind it. H. 0-148 in. B. 0-03. Mouth, height 

 0-024, breadth 0-018. 



This is a singularly long and narrow form. 



1 Hence the name. 



