120 PLIOCENE MOLLUSCA. 



somewhat variable Miocene species, with which it may he compared. As it is not 

 sufficiently perfect for certain identification I have figured it provisionallj'- under 

 the above name. It appears to be a distinct form and different from anything 

 hitherto recorded from the Crag ; possibly a better specimen ma}^ be found 

 hereafter. 



Genns STENOMPHALUS, Sandberger, 1861. 

 Stenomphalus Wiechmanni, Von Koenen. Plate XII, fig. 81. 



1872. Stenomjihalus Wiechmanni, Von Koenen, Mioe. Nord-Deutscli. Moll. Faun , p. 47, pi. i, 

 figs. 2, 10. 



Distribution. — Not known living. 



Fossil : Waltonian Crag : Little Oakley (derivative). Upper 

 Oligocene and Miocene : North Germany. 



BemarJcs. — The unique and immature specimen from Oakley here figured was 

 recognised by the late Dr. Gottsche of the Hamburg Museum as of this species.^ 

 Although imperfect and fragmentary, it is not much Avorn ; it appears to agree 

 generally with Von Koenen's figure, and is no doubt derivative in the Crag. A 

 similar and Recent shell is figured by Chenu as Purpura {Trochia) cingitlata (Man. 

 Conch., vol. i, p. 166, fig. 805, 18b9) ^= Baeci)ium cingulatum, Linne. I figure the 

 Crag fossil under the above name on Dr. Gottsche's authority. 



Gemis TRITON, Montfort, 1810. 

 Triton heptagonum (Brocchi). Plate XII, figs. 6, 7. 



1814. Murex heptagonus, Brocchi, Conch, foss. subap., vol. ii, p. 404, pi. ix, fig. 2. 



1872. Triton heptagonum, Bellardi, Moll. Terr. Terz. Piem., vol. i, p. 224. 



1879. Triton heptagonum, var. pyrenaica, Fontannes, Moll. Plioc. Vail, du Ehoue, vol. i, p. 33. 



pi. iii, fig. 9. 

 1890. Triton heptagonum, C. Eeid, Plioc. Dep. Brit., p. 257. 



Specific Characters. — Shell small, strong, ovate, turreted, sub-fusiform; spire 

 short; apex depressed ; whorls squarely angulate, forming a shelf below the suture, 

 the last much the largest ; suture deep ; sculpture, 4 — 6 distant longitudinal 



^ Dr. Gottsche, who appeared at that time in perfect health, took part in our pleasant excursion to 

 the Crag district during the Centenary meetings of the G-eological Society in 1907. His premature 

 death is much to be lamented. 



