414 TRANSACTIONS OF THE WAGNER FREE 



Teinostoma cryptospira Verrill. 

 Rotella cryptospira Verrill, Trans. Conn. Acad. vi. p. 241, 1884.. 



Post-Pliocene of North Creek, Little Sarasota Bay, West Florida, Dall ; 

 living off the coasts of North Carolina and Florida in 30 to i 50 fathoms, U. 

 S. Fish Commission. 



This little shell resembles T. Jtmbilicatiini Lea in having the whorls 

 nearly concealed by the thinned-out edge of the proceeding whorl, which is 

 appressed nearly to the apex. The surface is smooth and polished. The 

 fossils have been identified by comparison with a specimen named by the 

 author, who has not yet figured his species. 



Teinostoma opsitelotus n. s. 

 Plate 19, figures 5, 5 b. 



Pliocene of the Caloosahatchie and Shell Creek, Florida, Dall and Will- 

 cox. 



Shell small, solid, four-whorled ; upper surface flattened, the suture 

 distinct, narrowly marginate, appressed ; surface polished, with fine spiral 

 striae in front of the suture, becoming obsolete toward the periphery ; periphery 

 evenly rounded ; base full, obscurely spirally striate ; umbilicus, except in the 

 completely adult, rather large, subcylindrical.its margin formed by an obscure 

 angle ; in the adult it is completely filled by a flattish, somewhat irregular 

 callus ; aperture circular except at the upper junction of the lip with the body ; 

 pillar strong, vertical, broad at the umbilical angle ; body with a moderate 

 covering of callus. Alt. 1.3 ; max. diam. 3.3 ; min. diam. 2.5 mm. 



The adults vary considerably in the size they attain, and also in the size 

 of the umbilicus before it is filled up ; the young often have a more or less 

 distinct spiral rib on the upper surface, on which the' suture is wound, but 

 which becomes obsolete on the last whorl. The spiral striae sometimes, but 

 rarely, extend to the periphery, and are always stronger at the inner margins 

 of the whorls both above and below. The figures represent a young shell 

 before the umbilicus is filled ; the adult shows in its place merely a not-promi- 

 nent surface of callus. 



Section Solariorbis Conrad. 

 The type of this group is the Eocene T. depressuni Lea, a large and 

 beautifully sculptured Claibornian species. It is especially marked by the 

 punctate reticulated sculpture due to the intersection of spiral and transverse 

 grooving. To this species Meyer has attached T. rotula Heilprin as a 

 synonym. It seems somewhat doubtful that they can be identical, as no 

 indication of reticulate or punctate sculpture is given by Heilprin in either 

 description or figure. Other Eocene species of this section of the genus are, 

 from Claiborne, 7. i^Adeorbis) pigmis De Gregorio ; from the Jacksonian, T. 

 quadra?igtdare Meyer; T. planulatum H. C. Lea, of which subangulatum 



