334 EEV. R. BOOG WATSON ON THE 



between the exterior fold and the glaze-edge. L. 0"3. B. 0'14. 

 Mouth : L. 0-25 ; B. 0-03. 



This exceedingly peculiar form in many respects recalls, rather 

 than a Utricuhis, one of the long narrow low- spired Marginellas, 

 such as M. NevilU, Jouss., or M. avena, Kien. 



9. TIteiculus letjctjs, n. sp. (Xevkos, white.) 

 St. 73. June 30, 1873. Lat. 38° 30' N., long. 31° 14' "W". 

 "West of Azores. 1000 f ms. Olohigerina-ooze. Bottom tempe- 

 rature 39°-4 Fahr. 



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 furrows on the lines of growth. Spirals — ^the 

 whole surface is most faintly and doubtfully marked with very 

 feeble furrows, which are both narrow and superficial, parted by 

 broadish flat interstices. Oolour translucent white, with a faint 

 brownish tinge, glossy. Mouth long, narrow, shorter than the 

 shell, straight, with parallel sides, the enlargement in front 

 sudden, but very short. Outer Up 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 consequently 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. lop roundly 

 flattened down and slightly bent in round the small apical 

 perforation, round which 1 1 to 2 whorl-edges are visible. Inner 

 Up : across the body runs a strongish callus, whose edge exactly 

 corresponds with 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. H. 0*25. B. O'll. B. 

 of mouth at same place, 0'03. 



This species is very like Oylichna alba *, Brown, but it is 



squarer both above and below ; the obliquity of the line of the top 



is exactly the opposite of that in C. alba, where, from the outer 



lip rising above the top of the shell, the greatest height is at the 



* The similarity, indeed, suggested the name. 



