272 REV. R. boo a WATSON on the 



ward sweep of the base, which advances very far forward, but 

 leaves a short, square, projecting snout. Suture distinct and 

 deeply impressed, on the upper whorls slightly channelled. 

 Mouth oval ; the upper canal is distinct, but neither long, wide, 

 nor deep ; the lower canal is open and moderate in size ; but the 

 whole snout is rather exceptionally square and prominent. 

 Outer lip somewhat angular in its course, thin, prominent beyond 

 the varix, patulous internally, but externally scarcely at all re- 

 flected ; it is thickened within, and has very near its edge teeth in 

 groups of 3, 2, 2, 3, so placed as to avoid the longer spirals of the 

 external sculpture. Inner lip spreads somewhat thinly and with 

 a slightly disconnected edge across the body, it then runs straight 

 down the middle of the pillar : at the top of the mouth a long, 

 somewhat subdivided, and upward-curved tooth defines the canal ; 

 below this there are about 9 not very definite teeth on the body • 

 below the last of these is a wider break, and below this on the 

 pillar are about 6 more,rather strong at first, but steadily becomiug 

 smaller ; parallel to the edge the reverted flap of the lip is pro- 

 minent below the callus glaze, and finally stands out beyond this 

 glaze as a margin to the canal. H. 2'1. B. 1*44. Penultimate 

 whorl, height 0*45. Mouth, height to point of canal 1*2, breadth 

 from edge of callus 0*7. 



This species, better than any I know, forms a link between the 

 crumena and granifera groups of JRanella. It is very near JR. no- 

 bilis, Eve. ; but the form there is much broader and the system 

 of tubercles quite different. JR. affinis, Brod., is very like ; but in 

 that the form is much more regularly conical, the suture, so far 

 from being impressed, is run up on the preceding whorl, the 

 varices run down in straight regular succession, the apex is 

 ruddy purple, and the pillar is much shorter, thicker, and re- 

 flected. JR. ponderosa, Eve., has near affinities in arrangement of 

 tubercles and teeth of outer lip, but is larger in form and quite 

 different in colour and texture. R. rana, L., has a much sharper 

 apex, a much squatter form, and much more pointed tubercles. 

 Than JR. livida, Reeve, the ' Challenger ' species is much shorter, 

 thinner, more tubercled, its suture is more impressed, and its 

 pillar longer and straighter. Than JR. subgranosa, Beck, it is a 

 much less compact form, the spire being higher and smaller, the 

 base and suture much more contracted ; the body-whorl is in all 

 ways much smaller and shorter, but broader in proportion to 

 height. 



