RAPHITOMA TURGIDA. 267 



There seems to be some doubt as to what the M. Bertrandi of Payraudeau 

 really was, spechnens I have seen under that name differing not only from each 

 other, but also from the figures of the various authors who have described it. 

 Probably it occurs in the Crag, but this I must leave for the present. However 

 that may be, the shells now in question, which belong to Baphitoma, have nothing 

 to do with it, a view with which my friend Mr, le B. Tomlin agrees. He has been 

 kind enough to search through his very large collection of the Pleurotomidae, but 

 can find nothing to which they can be referred, expressing a strong opinion that 

 they are a new and undescribed species allied to R. neJnda. 



I venture very cordially to associate these fossils with the name of the Secretary 

 of the Palffiontographical Society in friendly acknowledgment of the kind interest 

 he has taken in the present Memoir, and the valuable assistance he has given 

 me during its preparation. 



Raphitoma megastoma (Brugnone). Plate XXIX, figs. 36, 37. 



1862. Pleitrotoma megastomrim, Brugnone, Mem. Pleur. foss. Palermo, p. 34, pi i, fig. 25. 



1875. Raphitoma megastoma, Seguenza, Boll. R. Com. Geol. Italia, vol. vi, p. 210, no. 228. 



1877. Baphitoma megastoma, Bellai'di, Moll. Terr. Terz. Piem., pt. ii, p. 311, pi. ix, fig. 23. 



1889. Raphitoma megastoma, Sacco, Boll. See. Geol. Ital., vol. ix, p. 283, no. 4343. 



Specific Characters. — Shell strong ; spire turreted, with an obtuse apex ; whorls 

 8 or 9, short, convex ; having nine or ten prominent and flexuous longitudinal ribs, 

 rather widely separated, extending to the base of the shell, with fine spiral striae 

 crossing them ; suture deep ; mouth oval, ending in a short and open canal. 



Dimensions. — L. 12 mm. B. 4 mm. 



Distribution. — Not known living. 



Fossil : Waltonian Crag : Beaumont, Little Oakley. Scaldisien : 

 Belgium. 



Lower Pliocene : Savona. Upper Pliocene : Colli Astesi, Valle Andona, Toi- 

 tona, Altavilla. 



Remarks. — -I have five or six specimens of this well-marked Italian species from 

 Beaumont and Oakley, and Mr. Van de Wouver has been kind enough to send me 

 another from the Belgian Crag, all of them closely corresponding with some shells 

 in my collection from the arglles hleues of the Ligurian coast. BapUitoma megastoma 

 has not been previously recorded from the Anglo-Belgian basin. 



Raphitoma turgid a (Forbes). Plate XXIX, fig. 30. 



1843. Pleurotoma turgida, Forbes, Rep. Moll, ^gean Sea, p. 139. 



1843. Pleurotoma trirgida, Reeve, Conch. Icon., vol. i (Pleurotoma), pi. xix, fig. 163. 



