REPORT ON THE GASTEROPODA. 269 



lines of growth. Colour dullish, somewhat opaque white. Spire high for the o-euus, 

 conical, barely subscalar. Apex extremely blunt and rounded, with a large but inserted 

 tip. Whorls 5, convex, the last oval, with a produced conical base. Suture very distinct, 

 impressed. Mouth oblique, rather wide, scarcely truncate in front. Outer lip slightly 

 ascending at its insertion, with a wide and very shallow sinus above, and a very slight 

 canal in front, where it is not in the least emarginate ; between these two points, its ed»e 

 advances a little ; it has a feeble, external varix, and a blunt, rounded edge, some way 

 within which are 6 or 7 small tubercle-like unequal teeth, which do not extend to the 

 upper part of it, and of which the highest is a little remote from the rest and larger 

 than they. Inner lip quite thin, hardly concave, and for more than half its length 

 occupied by the four strong pillar folds, of which the highest is (in the adult shell) 

 horizontal, the others oblique ; the last, which is continuous with the labral varix, forms 

 a narrow but prominent flange round the point of the pillar. H. 0"15 in. B. 0-08. 

 Mouth, height O'l, greatest breadth, 003. 



This is a larger, narrower, less gibbous shell than Marginalia, valida, Watson, with an entirely- 

 different mouth. 



10. Marginella (Glabella) elata, n. sp. (PL XVI. fig. 7). 



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

 Island, West Indies. 390 fathoms. Pteropod ooze. 



Shell. — Small, high - spired and narrow, biconically oval, strongish, porcellanous 

 white, dullish, with a narrow unemargiuate mouth, a feebly varixed toothless outer lip, 

 and 4 weak pillar folds. Sculpture: there are very slight lines of growth. Colour 

 dull opaque white. Spire high for the genus, narrow, conical. Apex extremely blunt 

 and rounded ; somewhat obscured by a small pad of enamel. Whorls 5, flatly conical 

 on the sides, the last is elongately oval, with a produced conical base. Suture barely 

 traceable, and that only by colour. Mouth scarcely oblique, narrow above, a little less so 

 in front. Outer lip hardly ascending at its insertion, with an extremely slight and narrow 

 sinus above, and a broad shallow canal in front, where it is truncate, but not emarginate ; 

 the front edge (which is narrow, but blunt) of the lip hardly advances ; outside there is a 

 diffused and slight varix ; within it is toothless. Inner lip quite unthickened, very 

 slightly concave, and for more than half its length occupied by four narrow, but rather 

 prominent equal folds, which twist round the point of the base, faintly marking the front 

 of the shell ; the furthest forward of them hardly forms a flange round the point of the 

 pillar. H. 0-111 in. B. 0-055. Mouth, height 0"072, breadth 0-017. 



This is a still higher, narrower, less gibbous shell than Marginella alta, and has no teeth on the 

 outer lip. 



