REPORT ON THE GASTEROPODA. 653 



This species is very like Uiricidus truncatulus (Brug.) ; but that has much stronger longitudinals, 

 no spirals, and an oblique crown, sloping down from left to right, on which side the top of the mouth 

 and outer lip rise in a rounded loop very considerably above the top of the body-whorl. 



9. Utriculus oryctus, 1 Watson (PL XLVIII. fig. 12). 



Utriculus oryctus, Watson, Prelim. Report, pt. 20, Journ. Linn. Soc. Lond., vol. xviL p. 337. 



Station 344. April 3, 1876. Lat. 7" 54' 20" S., long. 14° 28' 20" W. Ascension 

 Island. 420 fathoms. Volcanic sand. 



Shell. — Subcylindrically oblong, tumid below the middle and rounded in front, obsoletely 

 striate in tbe lines of growth, truncate above, where the crown is sharply angulately 

 edged and excavated with a papillary apex. Sculpture : Longitudinals — the ordinary ridges 

 and furrows in the lines of growth are feeble, except on the crown, where the old lip-edge 

 scars are strongish, close, and hair-like. Spirals — none, except that round the edge of the 

 crown there runs a sharp angulation in continuation of the outer lip. Colour ivory-white, 

 somewhat streaked longitudinally. Mouth a little longer than the body, and at the top, 

 to a small extent, enlarged, slightly curved on the inner side, and there in front gibbous ; 

 on the outer side it is nearly straight. WJiorls 3 ; the last encircles all the rest, which 

 only appear on the crown, where each rises above its predecessor in a round-faced curve ; 

 the first is papillary and immersed, the last rises above on the margin in a sharp edge and 

 is a little tumid in front. Suture slightly impressed. Outer lip rounded and cut off 

 backwards above, angulated at its upper outer corner, straight with a slight medial con- 

 traction, rounded and patulous in front; its edge line is very regularly curved. Top 

 deeply excavated, with a sharp edge. Inner lip : there is a very thin glaze ; the line 

 across the body is much curved, the narrowing forward of the body beginning early and 

 being considerable; the pillar is very oblique, subtruncate, very bluntly and faintly 

 toothed, with a narrow expanded sharpish-bordered edge, and an almost imperceptible 

 umbilical chink behind it. H. 0'13 in. B. 0"07. Mouth, breadth at same place 0*01. 



The very sharp outer rim of the crown in this species is characteristic. The species slightly 

 resembles a large and stumpy Cylichna umbilicata (Mont.), but is posteriorly squarer and more 

 truncate, the whole top is different, the line of the pillar is straight in its obliquity, not roundly 

 hollowed, and there is no spiral sculpture. 



10. Utriculus famelicus, Watson (PI. XL1X. fig. 1). 



Utriculus famelicus, "Watson, Prelim. Report, pt. 20, Journ. Linn. Soc. Lond., vol. xvii. p. 338. 



July 29, 1874. Levuka, Fiji. 12 fathoms. 



Shell. — Long, narrow, subconically cylindrical with straight outlines, abruptly truncate 



1 ofuxro';, excavated. 



