MARYLAND GEOLOGICAL SURVEY 265 



Occurrence. — St. Mary''s Formation. St. Mary's Eiver, Cove Point, 

 Langley's Bluff. Choptank Formation. Jones Wharf. Calvert 

 Formation. Plum Point. 



Collections. — Maryland Geological Survey, Johns Hopkins University, 

 Wagner Free Institute of Science, Cornell University. 



Teinostoma greensboroense n. sp. 

 Plate LXII, Figs. 5a, 5b, 5c. 



Descnptio7i. — Shell small, depressed, umbilicate; spire small, promi- 

 nent ; suture distinct ; body whorl large, convex on top ; periphery acute ; 

 mouth circular ; umbilicus deep ; surface with fine oblique revolving striae 

 and oblique radiating undulations which are very prominent on the sides 

 and base of the body whorl. 



This species resembles T. unclnla Dall. 



Height, 0.6 mm. ; diameter, 2 mm. 



Occurrence. — Choptank Formation. Greensboro, Cordova, Jones 

 Wliarf. 



Collections. — Marjdand Geological Survey, Johns Hopkins University. 



Genus COCHLIOLEPIS Stimpson. 



CocjiLiOLEPis striata Dall. 

 Plate LXII, Figs. 6a, 6b, 6c. 



Cochliolepis striata Dall, 1889, Rept. Blake Gastr., Bull. Mns. Comp. Zool. Har- 

 vard, vol. xviii, p. 360. 



Cochliolepis striata Dall, 1892, Trans. Wagner Free Inst. Sci., vol. iii, pt. ii, p. 419, 

 pi. xxiii, figs. 16, 17. 



Descriftion. — "A second species, larger and fewer whorled, has strong 

 spiral striae like a minute Sigarettis perspectivus, and was named C. striata 

 by Stimpson in his manuscripts. It is about 6.5 mm. in greatest diameter 

 and 1.5 mm. high. It has two whorls and a globular nucleus almost en- 

 veloped by the last Avhorl, and a very wide perverse umbilicus." Dall, 

 1889. 



This species is very rare at Plurn Point, and has not been found at any 

 other locality at as low a geological horizon or as far north as this. Dr. 

 Dall records it as living in Tampa Bay, and occurring fossil in the younger 

 Miocene of North Carolina. 



