CYLINDRELLOID ACHATINID^, ETC. 195 



dentition, which I have examined, is Achatinoid, the central 

 tooth being very narrow. 



PYRGINTA Greef. See GIRARD, Jornal de Sci. Math., Phys. 

 e Nat. Acad. Eeal Sci. Lisboa, iii, 1893, p. 108. Island of 

 St. Thome. 



THOMEA Girard. T. c., p. 106. Same locality. Radula 

 Stenogyroid. 



DISTCECHIA Crosse, Journ. de Conchy!., 1890, p. 164 (date?), 

 type Cylindrella parisiensis Dh. " Distcectria Cossman 

 MSS.," HARRIS & BURROWS, The Eocene and Oligocene Beds 

 of the Paris Basin, pp. 100, 114 (Sept. 23, 1891). Spartina 

 HARRIS & BURROWS, t. c., pp. 100, 113. Cylindrella DESH., 

 An. s. Vert, du Bassin de Paris, ii, 872; COSSMANN, Ann. 

 Soc. Roy. Malac. Belgique, xxiv, 1889, p. 358. 



An Eocene group of the Paris Basin, evidently related to 

 Pyrgina of the recent fauna. The specimens before me do 

 not support the reference of the genus to " Cylindrellidcz." 



CYLINDRELLINA Munier-Chalmas. Annales de Malacologie, 

 i, p. 324, pi. 7, f. 4-6, type and only species Cylindrellina 

 Iriardi M.-C., of Mons, Belgium. This group has some re- 

 semblance to Distcechia, and may be related to it. It has no 

 really Urocoptoid characters. 



ANOMA ADAMSI Pils. (p. 11). Illustrated on pi. 26 Acha- 

 tinidce, figs. 12 13. 



BRACHYPODELLA OBESULA Pils., n. n. for Cyl. obesa Weinl., 

 p. 57, not Cyl. obesa C. B. Ad. 



