MOLLTJSCA OP THE ' CHA.LLEH"aEK ' EXPEDITION. 125 



17. EULIMA CYLINDRA.TA, D. Sp. 



St. 2J.. March 25, 1873. Lat. 18° 38' 30" N., long. 65° 5' 30" 

 W. St. Thomas, N. of Culebra Island, Danish W. Indies. 390 

 fms. Coral-mud. 



Shell. — Smallish, thin, glossy, attenuated, with a rounded 

 longish base, a symmetrical spire, a blunt biggish tip, flat whorls, 

 a scarcely visible suture, and an ovate mouth. Sculpture. There 

 are very faint microscopic lines o£ growth, with a very feeble conti- 

 nuous indication of an old labial varix on successive whorls. Colour 

 translucent wbite with a slight yellow tinge ; the surface is bril- 

 liant. Apex is largish, blunt, and rounded, being somewhat 

 spread out and flattened down. Spire : as the whorls in their 

 growth increase very little in breadth, the breadth at the periphery 

 is slight ; and the apex being large, the form of the spire is some- 

 what cylindrical in comparison with other species of the genus*; 

 it is also straight, with nearly symmetrical profiles. Whorls 9, 

 of regular increase ; they are all small, and not in the least con- 

 vex ; the base is slightly elongated and is rounded. Suture scarcely 

 visible, but indicated by the interior septum. Mouth ovate, 

 pointed above. Outer lip very regularly curved ; its edge, which 

 is sharp and thin, retreats above, is rounded and prominent in 

 the middle, where it is slightly patulous ; in front it is extremely 

 so. Inner lip very direct in its oblique course from above to the 

 point of the short pillar, where it turns over a little abruptly, 

 joining the basal lip : there is a thin glaze on the body, and on 

 the pillar the narrow edge is slightly reverted. H. 0*15. B. O'Ol*. 

 Penultimate whorl, height 0-029. Tip of apex O'OOS. Mouth, 

 height 0-04, breadth 0'027. 



The shape of this species is somewhat like that of an ^cZis ; 

 but the texture of the shell and form of mouth are unmistakably 

 those of Eulima. It is a little like E. stenostoma, Jeffr., but is 

 more cylindrical and compressed, with shorter whorls and a much 

 smaller and relatively broader mouth. 



18. EuLiMA GOMPHus, u. sp. (yo^^os, a nail.) 



St. 24. (As above.) 



Shell. — Smallish, translucent, thin, glossy, rather attenuated, 

 with a subconical base, a symmetrical spire, a biggish but 

 bluntly-pointed tip, flat whorls, a distinct linearly impressed 

 suture, and an oval mouth. Sculpture. There are many close- 



* It is from this the name is clerired. 

 LINN. JOURN. ZOOLOGY, VOL. XVII. 10 



