215 Guppy Reprint 67 



Page 83 

 Strombiis bifrons 



Journ. Geol. Soc. vol. vi, p. 48, pi. ix, f. 9. 



Murex collatus n. sp. PI. I, f. 8.* 



Ovate, rimate, slightly flattened, adorned with numerous 

 thin slightly fimbriate or crenulate varices often doubled 

 especialty the later ones ; about 7 on the last whorl ; their 

 interstices indistinctly crossed by low transverse costse 

 which terminate in points on the varices ; the upper point 

 large, acute and projecting, giving an angulate appearance 

 to the shell : varices uniting below to form an irregular and 

 contorted canal. Whorls 6 — 7, somewhat angulate. Spire 

 sharp. Outer lip expanded and crenulate, obtusely dentate 

 within. Pillar lip smooth. Length about 25 mm. Breadth 

 about 15. Total length of last whorl including canal about 

 18 mm. 



Very closely related to M. calcitrapa Lam. (Eocene, 

 Europe). It is smoother and the whorls less angulate. 

 Those shells belong to a small group of Murices which 

 exhibits the connection through Trophon, Rapana, 

 Latiaxis, &c. to Purpura. M. collatus would perhaps be 

 ranked by some conchologists as a Trophon, as has already 

 been done with M. calcitrapa. 



Typhis alatus Sowerby 

 Journ. Geol. Soc. vol. vi., p. 48, pi. x. f. 4. 



A species almost as near to T. tubifer (Eocene, Europe) 

 as Murex collatus is to M. calcitrapa. The living analogues 

 of T. alatus are T. pinnatus and T. sowerbyi. 



Ancillaria pinguis n. sp. PI. I, f. 3_f 



Ovate conic, spire elevated, acuminate. Suture usually 

 visible through the enamel which covers the spire and 

 accompanied at a little distance by a keel the ridge of 

 which is thread-like. Aperture suboval, elongate — Um- 



[*Geological Magazine, vol. n, 1874, pi. 16]. 

 [fGeological Magazine, vol. 11, 1874, pi. 16]. 



