208 RETUSA. 



Utricidus simplex A. Adams in shortness of body. Tornatina olivula 

 A. Adams is much slimmer, longer in the mouth, and much more 

 cylindrical. It differs from Utricvlus spatha Watson in its greater 

 breadth, higher spire, shorter mouth, coarse, sculpture, more numer- 

 ous whorls, and more abrupt truncation in front, where the shell is 

 cut off almost at right angles to the axis. Alt. 0'32 in., diam. 0"17. 

 Mouth, height 0*2, breadth 0-05 (Wats.). 



West of the Azores, 1000 fms. (Challenger). 

 Utricu/us oliviformis Watson, Journ. Linn. Soc. Loud., xvii, p. 

 t332. — Utriculus n. sp. Watson, Chall. Rep. Gastr., p. 648, pi. 48, 

 f. 6. 



R. LEUCus Watson. PI. 21, fig. 1. 



Shell strong, cylindrical, with a very slight upward taper, rounded 

 at either end, with an oblique flat apex and a minute perforation 

 round which the edge of the penultimate whorl is visible, and in the 

 middle the sunken apex ; the mouth is small and narrow, and in 

 front abruptly truncate, with a short truncate very bluntly toothed 

 pillar. Sculpture : Longitudinals — there are slight, unequal fur- 

 rows on the lines of growth. Spirals — the whole surface is most 

 faintly and doubtfully marked with very feeble furrows, both nar- 

 row and superficial, parted by broadish, flat interstices. Color 

 translucent white, with faint brownish tinge, glossy. Mouth large, 

 narrow, shorter than the shell, straight, with parallel sides, the en- 

 largement in front sudden but very short. Outer lip straight, 

 rounded above, where it springs from the callus of the inner lip; it 

 does not rise so high as the opposite side of the apex, which conse- 

 quently is rather oblique; its edge line is slightly produced in the 

 middle, but not bent in ; in front, the lip, in common with the 

 whole shell, is very abruptly truncate, and here it sweeps round with 

 a strong, sharp, bevelled edge to join the pillar lip. Top roundly 

 flattened down and slightly bent in, round the small apical perfora- 

 tion — round which I5 to 2 whorl edges are visible. Inner lip: 

 across the body runs a strongish callus, whose edge is parallel to the 

 edge of the outer lip ; in front it is flatly and broadly appressed on 

 the very stumpy pillar, round which twists a strongish but very 

 blunt tooth. Alt. 0"25 in., diam. O'll. Breadth of mouth at sam© 



place, 0-03 ( Wuts.). 



West of Azores, 1000 fms. (Challenger). 

 Utriculus lexicus Wats., J. L. S. L., xvii, p. 334; Chall Gastr., p. 

 649, pi. 48, f. 8. 



