352 PLIOCENE MOLLUSCA. 



T. clathratus, with a less tumid body-whorl, finer and more numerous longitudinal 

 costse and a longer canal. 



Dimensions. — L. 22 mm. B. 8 mm. 



Distribution. — Fossil : Waltonian Crag : Little Oakley. Newbournian. Butleyan. 

 Wexford. 



Remarks. — This variety is fairly common at Oakley, occurring also at other 

 localities of the Red Crag. 



When a number of specimens from one Crag locality are examined it is not 

 always easy to separate them from the type form of T. clathratus. The present 

 shell is evidently a variety of that species. 



Var. exilis, nov. Plate XXXVI, figs. 0, 10. 



Varietal Characters. — More slender and smaller than the last variety, multi- 

 costate, with a narrow, fairly long canal, turning to the left. 



Dimensions. — L. 15 mm. B. 6 mm. 



Distribution. — Fossil : Wexford, Isle of Man. 



Remarks. — This form, of which I have obtained several specimens from 

 Wexford and one from the Manx drift, seems to be sufficiently distinct to deserve 

 a special name. It may be grouped, I think, with T. clathratus, as var. exilis. 



Trophon (Boreotrophon) Gunneri (Loven). Plate XII, fig. 2G ; Plate XXXVIII, 



figs. 19, 20. 



1838. Fusus Peruvianus, J. Smith (of Jordan Hill), Mem. Wernerian Nat. Hist. Soc, vol. viii, p. 52, 



pi. i, tigs. 5, 6. 

 1872. Trophon clathratus, var., Jeffreys in Prestwich, Quart. Journ. Geol. Soc , vol. xxvii, p. 492. 

 1880. Trophon clathratus, var. Gunneri, Stewart, Pioc. Belfast Nat FieLl Club, Appeudix, p. 175. 

 1910. Trophon clathratus, var. Gunneri, Odhner, Arehiv Znol., K. Svensk. Vet.-Akad., vol. vii, no. 4, 



pp. 13, 24. 



1914. Trophon, Gunneri, F. W. Harmer, Plioc. Moll. Gt. Brit., pt. i, p. 128, pi. xii, fig. 20. 



1915. Trophon Gunneri, A. Bell, Geol. M;ig. [6], vol. ii, p. 168. 



Distribution. — In addition to the localities for this shell given previously 

 (p. 128) may be added the boulder-clay of Belfast, the high level drifts of Wales, 

 Cheshire, Staffordshire and Lancashire and Uddevalla. I have also received 

 several specimens from Wexford. It is distinctly a northern and arctic form. 

 The first notice of it seems to have been that of Smith, given above. 



Coq. Eoss, Belg., p. 501, pi. xl, fig. 5, 1843. 



