ii6 Bulletin 4 330 



Type. — Aldrich's collection. 



Specimen Jigicred. — lyca Memorial collection, Ac. Nat. Sci.,Pliila. 



KEILOSTOMA. 

 JCeilostoma mediavia n. sp. , PI. 12, figs. 8, 9, a. 



Specific chai^acterization. — General form and size as indicated 

 by the figures, though sometimes slightly thicker or less elongate; 

 whorls about eleven, generally with very faint longitudinal plica- 

 tions, uppermost whorls with rounding sides, medial ones with 

 straight sides and body whorl with sometimes a slight medial 

 depression; no spiral striae; surface semi-polished; suture distinct, 

 somewhat shouldered below; mouth typical of the genus, i. e., 

 with a strong labial callosity which passing beneath comes up 

 on the outside of the labrum as a flattened varix which shows 

 a few longitudinal lines of growth. 



Fig. 8 is of a specimen collected by the writer, 1895, and now 

 in Cornell Univ. Pal. collection, while figs. 9, 9a, are of a speci- 

 men in the U. S. Nat. Mus. collection, collected by L,. C. Johnson 

 about 10 years ago. A few years ago while looking over the 

 Eocene material in the U. S. Nat. Mus. collection, I was struck 

 with the resemblance this form bore to Gabb's Loxotrema; but 

 Deshayes' Keilostoma seems to fit it so much better I have no 

 hesitation in referring it to that genus. In fact our species is 

 very closely allied to Deshayes' plicatula^ Coq. Foss. des Bnv. de 

 Paris, 1824, vol. ii, p. 115, pi. 14, figs. 5, 6, from the lower beds 

 of the Paris Basin Eocene. "Abbecourt pres Beauvais." 



See also Descr. An. Sans Vert., etc., vol. ii, p. 426. 



Localities. — Alabama: The exact localities of the U. S. Nat. 

 Mus. specimens are not known though they came from Wilcox 

 Co., Sta. 264. Specimens preserved in the same material, lime- 

 stone, are in our collection from ^ mi. E. of S. McConnico's, or 

 perhaps i^ mi. S. W. of Palmer's mill. They are from bed 18 

 of our section. Others preserved as casts were found in bed 21 

 of the same general section, that is, in the light, micaceous sand- 

 stone ledges beneath Palmer's mill. Still another is from the 

 railroad cut, i^ mile N. E. of Clayton. 



Types. — Paleontological Museum, Cornell University, and U. 

 S. National Museum. 



CALYPTRy^A. 

 CalyptrcBa sp., PI. 12, figs. 10, 11. 



The two specimens (casts only) were collected in the R. R. 



