INSTITUTE OF SCIENCE, PHILADELPHIA. 165 



Miocene at Ballast Point, Tampa Bay, in the silex-beds ; White Beach, Little 

 Sarasota Bay, Florida, and North Carolina Miocene, probably, but as internal 

 casts of which one cannot be certain. 



A comparison of types results in the above consolidation. The transverse 

 lines on the base of Prof Heilprin's specimen are exceptional and appear to 

 be due to the process of mineralization or of weathering before the pseudo- 

 morph was formed. Five specimens in excellent condition do not show it. 

 This species is related to C. sphcBroides Conrad, which is more inflated and 

 globose and larger, beside showing differences in the teeth. It also recalls C. 

 obesa and C. media Deshayes, of the Parisian Eocene, though smaller than 

 either; and like them is stratigraphically associated with a sulcate form named 

 by Conrad Stdcocyprcea. Of this section Deshayes figures two or three 

 Parisian species ; one, S. lintea Conrad, is known from our later Eocene. 



A single species, C. Smithii Aldrich, has been described from the earlier 

 Eocene of Alabama (Gregg's Landing beds). C. sphceroides Conrad is from 

 the Claibornian, and is the type of his worthless genus Cyprcsorbis, a synonym 

 of the section Liiponia Gray. In the Upper Eocene, beside C. HeUprini and 

 piiigjiis ,\v\{\ch. pass into the Miocene, there is a cancellated form, C\Cyprcedid) 

 fcnestralis Conrad, which occurs at Vicksburg and in the Ocala limestones. 



C. anmdifera Conrad is a C. anuubis, dropped by some Indian or trader 

 on the Yorktown Peninsula. It retains some of its color, is not a fossil, and 

 only one specimen has ever been found. There is no good reason why it 

 should be retained in our lists. 



In Tuomey's Report on the Geology of South Carolina, 1848, among the 

 Eocene fossils enumerated are Cyprcea lapidosa Conrad, C. semen and C. liemi- 

 sphcBrica Tuomey. These are mere names, never having been described or 

 figured. The type of the C. lapidosa is still to be found in the museum of the 

 Academy of Natural Sciences. It is an unrecognizable internal cast which 

 may even not be a Cypraa. 



In the Miocene, beside C. piiigins and C. Heilprini, we have in the lower 

 beds a fine species which I have named C. Willcoxii, and in the upper beds, 

 beside Trivia pedicidas L., we have the splendid C. Caroline nsis Conrad, which, 

 when well preserved, shows that its color-pattern was of small, round, dark 

 spots on a lighter ground. The reference of C. carolinejisis by Tuomey and 

 Holmes to the Pliocene is part of the confusion between the Miocene and 

 Pliocene which pervades that otherwise praiseworthy work. 



In the Pliocene we have the extraordinary Siphocyprcea and several species 

 of Trivia. 



In the West Indian Miocene there are a good many forms of Cyprcea 

 which require more careful study. I cannot altogether accept some of Gabb's 

 determinations. C. Henekeni Sowerby is a precursor of C. mus, and the species 

 referred by Guppy to C. pnshdata, and by Gabb to C. rmcleiis, was finally 

 described by Guppy as C. Gabbiana. 



