MOLLUSCA OP THE ' CHALLENaEE ' EXPEDITION. 119 



Shell. — Small, straight, high and narrow, translucent, with 

 slightly impressed suture, flat-sided whorls, a long slowly at- 

 tenuated and scarcely rounded base, a very long pear-shaped 

 flat-ended mouth, and an excessively sharp tip. Sculpture none. 

 Qolour glossy, translucent white with a tinge of yellow in the 

 middle of the whorls. Apex excessively minute, not quite sym- 

 metrical as the tip rises on one side. Spire high and narrow, 

 almost but not quite symmetrical in its profile-lines. Whorls 

 12, very nearly quite flat-sided, but towards the tip a little 

 convex. Suture rather oblique, scarcely impressed but defined 

 by the septum, which shines through the shell. Moidh long, 

 pear-shaped, but a little truncated in front. Outer lip scarcely 

 in the slightest degree convex, not patulous except in front, 

 where it forms a shallow gutter; its edge is deeply sinuated 

 above, very prominently rounded in the middle, and slightly 

 retreating in front. Inner lip almost quite straight to the 

 point of the pillar, where the meeting with the gutter-edge is very 

 abrupt and almost angulated ; the defined-edged glaze spreads a 

 little on the body and runs out straight on the flat and narrowly 

 expanded pillar. H. 0"16. B. 0"04. Penultimate whorl, height 

 0-02. Tip of apex 0-003. Mouth, height 0-05, breadth 0-025. 



Compared to IE. intermedia, Cantr., this is a much slimmer 

 form, with a longer more attenuated base, more curved profiles, 

 and a much sharper apex. Than E. oxytata it is slimmer, the 

 profile-lines are not quite so straight nor the individual whorls 

 so flat, the suture is more oblique, the mouth does not project 

 laterally, the base is smaller and longer, and the apex is not so 

 minute nor so symmetrical. 



10. EULIMA SAEISSA, U. Sp. 



St. 122. Sept. ]0, 1873. Lat. 9° 5' S., long. 84° 50' W. Ofl" 

 Pernambuco. 350 fms. Mud. 



Shell. — Straight, high and narrow, rather dull, with a scarcely 

 perceptible suture, very slightly rounded whorls, a short stumpy 

 base, roundish mouth lying very much in the line of the axis, 

 and with a very small symmetrical tip. Sculpture. There are 

 coarsish microscopic lines of growth. Colour dullish white, but 

 the shell is dead. Apex very small and symmetrically rounded. 

 Spire narrow, straight, nearly symmetTical, but with slightly 

 undulating profile-lines ; most marked as usual near the apex, 

 the last two whorls of which have a slight but marked con- 



