MOLLUSCA OF THE ' CHALLENOEE ' EXPEDITION. 115 



Shell. — High, narrow, and pliant in its lines, with a scarce 

 visible oblique suture, short flat-sided whorls, a rounded con- 

 stricted base, a very large and most patulous mouth, and a small 

 rounded but slightly flattened and unequally sided tip. Sculpture. 

 There are some microscopic soft lines of growth, which are only 

 visible in exceptionally good light. Colour translucent white. 

 Apex small, slightly compressed laterally, a little unequally sided, 

 and rounded yet faintly flattened down on the tip. Spire higli, 

 narrow, and slightly flexuous. Whorls 13, not quite flat on the 

 side ; they are short and narrow, and of very slow increase ; 

 the base is a little elongated and very slightly rounded. Suture 

 linear, but just perceptibly impressed ; it is very distinct near 

 the top of the spire. Mouth large and very open, pointedly 

 ovate. Outer lip very slightly arched and patulous ; on the 

 edge it is deeply sinuated above, pro minent in the middle, and 

 retreating very little to the base, where it is extraordinarily ex- 

 panded into a spoon-edged shallow canal. Inner lip : a very thin 

 glaze with a most faintly defined edge extends across the body ; 

 the pillar-edge is narrow, rounded, expanded, with a very minute 

 furrow behind it. H. 0'32. B. 0'08. Penultimate whorl, height 

 0-04. Tip of apex O'OOl. Mouth, height O'l, breadth 0-05. 



This species in many respects resembles in form E. gracilis, 

 Forb., the large variety of -E^. distorta,'DQ^\\.; but has a larger apex, 

 a coarser suture, a more contracted, less tumid, and much more 

 one-sided base, and a totally different mouth. Than E. inter- 

 media, Cantr., it is much more attenuated. 



5. EuLfMA HIANS, n. Sp. 



St. 24. (As above.) 



Shell. — Largish, somewhat broad, with a coarsish linear suture, 

 short flat-sided whorls, a rounded somewhat constricted base, a 

 large patulous mouth, and a small apex. Sculpture. There are 

 feeble microscopic lines of growth ; along either side, not quite 

 regularly, nor correspondingly nor uninterruptedly, are scores 

 which mark an old mouth-edge on the succeeding whorls. Colour 

 dirty white (but the specimen is a dead shell). Apex small, 

 contracting rather suddenly, and in the middle the extreme tip 

 rises into view. Spire high, slightly flexuous, and with not quite 

 similar profile-lines. Whorls 11, just appreciably convex ; the 

 earlier ones are rounded ; the last is largish, a little tumid, very 

 faintly angulated at the periphery, with a rounded base, at the 



