INSTITUTE OF SCIENCE, PHILADELPHIA. 375 



Seclion Anipullinopsis Conrad. 



Antpullinopsis Conrad, Am. Journ. Conch, i. p. 27, 1865. 

 Megatylotus Fischer, Man. de Conchyl., p. 766, 1S85. 



As Conrad's name was not defined, it is probable that the later name of 

 Fischer should be adopted. 



AmpuUina crassatina Lam. var. mississippiensis Conrad. 



Natica crassatina Deshayes, Descr. Coq. Par. ii. p. 171, pi. xx. figs, i, 2, 1825 ; De Greg., 



Mon. Claib., p. 148. 

 Anipullana crassatina Lam., Ann. du. Mas. v. p. 33, viii. pi. 61, figs. 8 a, 8 b ; An. s. 



Vert. vii. p. 550. 

 Natica mississippiefisis Conr., Proc. Acad. Nat. Sci. iii. p. 283, 1847 ; Journ. Acad., 2d Ser. 



i. p. 114, pi. II, fig. 10, 1848 ; De Greg., Mon. Claib. Eoc, p. 148. 



Eocene of Bell's upper and Gregg's Landing, Alabama (Aldrich) ; of 

 Claiborne (?) De Gregorio ; Carson's Creek, Wayne County, Miss. (Red 

 Bluff Group), Burns; lowest bed at Vicksburg, Miss., Burns. The type is 

 found in the upper sands of Fontainebleau, in the Parisian, and in the Eocene 

 and Older Miocene of France, Germany, and even the Crimea. It appears to 

 be omitted in M. Cossmann's excellent monographic list, and the above locali- 

 ties are given on the authority of Deshayes. 



Conrad's figure of his shell is abominable, and De Gregorio's are not very 

 good. The shell, on comparison of specimens, differs from the French form 

 by being somewhat narrower and more elevated, and in wanting any trace of 

 the fine spiral striation which is found on the French specimens. The umbili- 

 cus is almost always closed, but specimens with an open chink do occur occa- 

 sionally. It reaches a height of 65 and a breadth of 45 mm. I do not see 

 any characters in the American shell which may not be varietal, if we regard 

 the Parisian species as the type. I have examined about forty specimens, 

 mostly well-grown. De Gregorio does not specify where his specimens came 

 from. I have not seen any from the Claiborne sands. 



AmpuUina amphora Heilprin. 

 Natica amphora Heilprin, Trans. Wagner Inst. i. pp. 112, 120, pi. 16, fig. 50, 1887. 



Miocene of the Orthaulax bed. Ballast Point, Tampa Bay, Florida, Stearns, 

 Heilprin, etc., and of the Tampa limestone, Tampa City, Dall. 



This fine large species seems to bear to the var. mississippiensis such a 

 relation as the A. maxima of the French Older Miocene does to the typical 

 crassatina. In all the specimens I have seen, old or young, the umbilicus 

 opens by a very oblique aperture or fissure. The basal fasciole is narrower 

 and defined by a more distinct line than in mississippiensis, from which, other- 

 wise, it can be separated only with great difficulty. 



AmpuUina reversa Whitfield. 

 Natica reversa Whitfield, Am. Journ, Conch, i. p. 264, 1865. 



