246 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



as they were so described, and I only know them from figures and 

 desorijjtions, I do not like to remove them. 

 Fur»i. et loc. — Culcaire Grossier at Mons. 



24. P. distensum, Briart and Cornet. Mem. Acad. R. Belg. 1889, 

 xlvii. p. 96. 



Described as a Pythia, but I consider it a Plecotrema despite its 

 varices. 



Form, et loc. — Calcaire Grossier at Mons. 



25. P. Callibasis (Des Moulins MS ), Toumouer. Journ. de Conch. 

 1871, xix. p. 361. 



Form, et loc. — Miocene at Martillac, etc. 



26. P. marginale, Grateloup, 1838, Act. Soc, Linn. Bordeaux, x. 

 p. 255. 



Form, et loc. — Miocene at Saint-Paul, Mainot, Martillac, etc. 



27. P. Bourgeoisi, Tournouer. Journ. de Conch. 1870, xviii. 

 p. 356. 



Form, et loc. — Miocene at Pont-Levoy. 



28. P. Blesene, Tournouer. Journ. de Conch. 1870, xviii. p. 357. 

 I leave this and the last in Plecotrema., with some doubt. 



Form, et loc. — Miocene at Pont-Levoy. 



Mons. Toumouer also places his P. Belaunayi^ in this group, but 

 I do not think it properly belongs here. Probably several other fossil 

 species are known, which, though congeneric with the above, have 

 been placed in different groups. 



1 Joura. de Conch. 1870, xviii. p. 357. 



