EEPORT ON THE GASTEROPODA. 509 



it is slightly hollowed backward on the edge, while it advauces in front to the periphery : 

 its direction is very straight in the line of the spire's slope ; on the base, which is narrow, 

 it is extremely patulous. Inner lip : a very thin and undefined glaze expands on the 

 body, which is very faintly convex, and melts without a break into the pillar, which is 

 very slightly thickened, rounded, and twisted, and behind which lies the slightest possible 

 furrow. H. 0'17 in. B. 0*04. Penultimate whorl, height 0'027. Tip of apex, breadth 

 0-005. Mouth, height 0-058, breadth 0-024. 



This species, in the perfect flatness of its whorls, the absence of any impression of the suture, 

 and form of the apex, greatly resembles Eidima suhulata, Don. ; but it is much more attenuated, the 

 body-whorl in particular is more contracted at the periphery, aud the apex is smaller and more 

 perfectly rounded and very slightly bent to one side. In Eulima bilineata, Alder, the base of which 

 is more like the Challenger species, the whorls are slightly rounded. In Eidima philippii, Wein., 

 var. gracilis, there is always some slight irregularity in the spire, and the apex is very much more 

 minute. 



5. Eulima fasciata, Watson (PI. XXXV. fig. 2). 



Eulima fasciata, Watson, Prelim. Report, pt. 17, Journ. Linn. Soc. Lond., vol. xvii. p. 113, sp. 2. 



Station 24. March 25, 1873. Lat, 18° 38' 30" N., long. 65° 5' 30" W. Off Culebra 

 Island, West Indies. 390 fathoms. Pteropod ooze. 



Sliell. — Very small, slightly bent, short ; the suture is discernible on the surface and 

 faintly banded above with white, the base is rounded, the mouth pointedly oval, the tip 

 small and rounded. Sculpture: none. Colour translucent, with an ivory band encircling 

 the body-whorl at the periphery, and lying above the suture on the spire. Apex small, 

 perfectly rounded. Spire rather attenuated and bent. Wliorls 9, flat, the last rather 

 long, with a produced rounded base. Suture oblique, slightly impressed, especially near 

 the apex. Mouth rather large, oval, pointed above. Outer lip a little prominently 

 arched ; on its front edge it is rather deeply sinuated above, prominent in the middle, 

 and retreating at the base so as to form a broad, shallow, little canal in front. Inner lip : 

 a very narrow rather thin glaze with a defined edge crosses the body, and runs straight 

 down the pillar, which is very narrow and patulous, with a sharp prominent edge and a 

 very minute furrow behind it. H. 0-096 in. B. 0-034. Penultimate whorl, height 

 0-017. Tip of apex, breadth 0-004. Mouth, height 0*03, breadth 0-017. 



Than Eulima jeffrcysiana, Brus., this is a slightly stumpier form ; the whorls are not in the 

 least convex, the apex is blunter and more truncated, the outer lip is much more laterally expanded, 

 and the basal line much more oblique. The form of the mouth and the slightly larger tip distinguish 

 it from the young of Eulima intermedia, Cantr. 



