TRANSACTIONS OF WAGNER 

 620 



TERTIARY FAUNA OF FLORIDA 



Not Area avintlcffonnis Nyst, Tabl. Synopt., p. 12, 1848; = Area aviculoides Reeve, 



1844, not of De Koninck, 1844. 

 Arcoptera avicutaformis Harris, in Dana, Man. Geol., 4th ed., p. 900, fig. 1510, 1895. 



Pliocene marls of the Caloosahatchie, Shell Creek, and Myakka River ; 

 Heilprin, Willcox, and Dall. 



This fine species is quite variable in the development of the extended 

 wings which suggested Professor Heilprin's name. In many specimens the 

 posterior wing does not exceed that usual in A. occidcntalis, while in others it 

 may extend an inch beyond the rest of the shell. The anterior wing is less 

 prominent and a little more constant, but is frequently paralleled by fossil and 

 even by recent specimens of A. occidentalis Phil. So far as yet known, this 

 species is confined to the Floridian Pliocene. The character of the cardinal 

 area is similar to that of A. note. 



Area occidentalis Philippi. 



Area occidentals Phil., Abbild. u. Beschr., iii., p. 14, pi. xvii. /;, fig. 4 a-c, 1847. 

 Area zebra Swainson, Zool. 111., No. 26, pi. 118, 1831 ; ex parte. 

 Area noce of many authors, not of Linne. 



Oligocene of the Bowden beds, Jamaica, Guppy, Henderson, and Simp- 

 son ; Miocene (?) of Curasao, U. S. Fish Commission ; Pliocene of the Caloosa- 

 hatchie marls, Florida, Dall ; Pleistocene of the Florida Keys, Yucatan, and 

 most of the West Indian Islands ; recent in the Antilles generally, and along 

 the eastern coast of the United States northward to the vicinity of Cape 

 Hatteras, North Carolina. 



A careful comparison shows that the American shell should not be united 

 with the Mediterranean A. nocz. The restricted A. zebra, according to Swain- 

 son, comes from the Mediterranean, but Reeve refers it to Manila. The west 

 American recent analogue appears distinct. Although in taking up the species 

 I doubted if the Bowden fossil could be the same as the recent shell, I am 

 obliged after careful comparisons to regard them as identical. The species is 

 very rare in the Caloosahatchie marls, and only represented in my collection 

 from them by a few young valves. 



Area umbonata Lamarck. 



PLATE 38, FIGURES 4, 4 a. 



Area umbonata Lam., An. s. Vert., vi., p. 37, 1819; ibid., 2d ed., vi., p. 432, 1835 

 (syn. partim excl.) ; Philippi, Abbild. u. Beschr., iii., p. 13, pi. xvii./), fig. 3 a-c, 1847. 

 Area noce Stimpson, S. I. Checklist, E. Am. Mar. Shells, p. 2, 1860. 



