REPORT ON THE GASTEROPODA. 35.9 



others, stronger and wider apart, occupy the base, and about 4 more the snout ; here and 

 there a much finer thread occurs in the intervals. Colour white. Spire high, subscalar, 

 conical. Apex small, high, conical, with tumid whorls ; the sculpture is typical, i.e., with 

 straight bars above and obliquely reticulated ones below ; the two or three of the very tip 

 are broken. Whorls 6 to 7, exclusive of those which form the apex, of regular increase, 

 with a drooping concave shoulder, keeled, and below the keel almost cylindrical, but with 

 a very slight contraction to the lower suture ; the last whorl is short, tumid, with a 

 rounded base produced into a short, broad, triangular, one-sided snout. Suture very 

 slightly impressed and extremely small, as the inferior whorl laps up on the one above it. 

 Mouth angularly oval, pointed above, broad in the middle, and obliquely prolonged below 

 into the short canal. Outer lip concave in the sinus-area and angulated at the keel ; it 

 forms from this point a very regular curve to the front : the edge, which sweeps far out 

 below, forms rather a low shoulder above, between which and the body lies the deep, 

 rather narrow, open-mouthed, rounded sinus. Inner lip is excavated, has a slight raised 

 border outside of it, is rather broad, and continues to the- extreme point of the short 

 narrowish pillar, which is rather obliquely cut off with a rounded twisted edge, and whose 

 junction with the body is deeply concave. H. 0"54 in. B. 0'24. Penultimate whorl, 

 height 0-1. Mouth, height 0-24, breadth 0'13. 



This species has some resemblance to Clathurella formosa, Jeffr., and to another Challenger 

 species from Station 73, for which I had chosen the name Clatlmrella smilcuta, unfortunately a 

 young specimen. The distinction between the present species and these others is expressed by the 

 name chyta ; 1 while Clathurella smilcuta 2 is like a thing blocked out of the solid. Clathurella 

 formosa, Jeffr., again resembles something on which superficial ornament has been laid and attached 

 by melting. In all three cases there is resemblance in the forms and sculpture ; but under that 

 resemblance there is the strongest difference. 



13. Clathurella perpauxilla (Watson), (PI. XXII. fig. 7)- 



Pleurotovia (DeJ rancia) perpauxilla,~W "atson, Prelim. Report, pt. 10, Journ. Linn. Soc. Lond., voL xv. 



p. 468. 



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

 Culebra Island, West Indies. 390 fathoms. Pteropod ooze. 



Shell. — Very small, high and narrow, white, ribbed and spiralled, with convex whorls, 

 a small elongated regular body, impressed suture, a high, conical, small-tipped spire, a 

 rounded base, and a small, longish, triangular one-sided snout. Sculpture: Longitu- 

 dinals — there are on the latter whorls about 9 biggish flatly rounded ribs, parted by 

 equally broad open rounded furrows ; in the upper whorls they barely reach the lower 

 suture ; on the last they hardly extend to the base ; they originate at a shoulder below 



1 X UT0 'f) cas k 2 «A"Xsure'{, chipped out. 



