356 PLIOCENE MOLLUSCA. 



turreted, rapidly diminishing- in size towards a blunt apex; mouth ovate; canal 

 short, inclining- to the left. 



Dimensions. — L. 14 mm. B. 7 mm. 



Distribution. — -Not known living-. 



Fossil: Wexford gravels — Blackwater. Rathaspick, Co. Wieklow. 



Remarks. — -This form, discovered by Capt. .James many years ag-o in the Irish 

 drifts, has been hitherto known only from his unique specimen preserved in the 

 Museum of the Geological Survey at Jermyn Street, where it still bears Prof. 

 Forbes' original name of Fusus ( Trophon) Fabricii. Mr. A. Bell has always 

 contended that it should be regarded as specifically distinct, proposing to call it 

 T. Bailyi, after the former palaeontologist of the Irish Survey, a view which I now 

 adopt. 



It departs materially from the typical T. Fabricii, here given as Ocinehra 

 craticulata, belonging to a group of small Trophons ; of these, several different 

 forms have been obtained at Wexford which I cannot satisfactorily identify. In 

 some of them the whorls are squarely angulated above, in others they are rounded. 



I have found one or two examples of the present shell in Father Codd's recent 

 consignments, one of which I now figure. They correspond with the Jermyn Street 

 specimen. 



The variety and abundance of these small Trophons in the Wexford beds is 

 remarkable. As stated above, I have some hundreds of them altogether in my 

 collection. Taken as a whole they seem to form a special group, different from 

 that either of any recognised horizon of our Pliocene or Pleistocene deposits, or of 

 the existing seas of Great Britain or Scandinavia. 



Some of these I have described provisionally as specifically distinct ; others as 

 varieties of recognised species to which, however, they do not always bear a very 

 striking resemblance. 



Trophon (Trophonopsis) Harmeri (A. Bell). Plate XXV, fig. 13; Plate XL, 



figs. 27, 28. 



1915. Trophon Harmeri, A. Bell, Geol. Mag. [6], vol. ii, p. 167. 



1915. Trophon tmncatus, var. Harmeri, P. W. Harmer, Plioc. Moll. Grt. Brit,, pt. ii, p. 201, pi. xxv, 

 fig. 13. 



Specific Characters. — Shell small, ovate, fusiform; whorls 5, convex, rounded, 

 not angulate above, the last much the largest, nearly three-fourths the total length; 

 ornamented by strong, closely-set costas, and by a few distant but clearly- 

 marked spiral lines ; suture rather deep ; mouth oval ; outer lip regularly curved; 

 canal short, bending to the left. 



Dimensions. — L. 12 — 1-1 mm. B. G — 7 mm. 



