TRANSACTIONS OF WAGNER 

 758 



' J TERTIARY FAUNA OF FLORIDA 



This small species is destitute of the reticulate sculpture on the left valve 

 which characterizes P. alabainaisis, and is doubtless distinct. It has been 

 referred by Professor Harris to Lamarck's species. On comparing the figures 

 of Harris and of Deshayes, the latter seem to represent a species broader and 

 more orbicular than Professor Harris's figures of the Wood's Bluff shell. I 

 have, however, not seen specimens of either. There are several closely related 

 recent species in the deep waters of the Atlantic off the American coast and 

 among the West Indian islands. 



FAMILY SPONDYLID^. 



Genus SPONDYLTJS Linne. 



i/"^ 



Spondylus Linnd, Syst. Nat., Ed. x., p. 610, 1758. Type S. gicdcropus L. Mediter- 

 ranean. 



The species of this genus are not numerous in the American Tertiary or 

 the recent fauna. 



Spondylus dumosus Morton. 



Plagiostoma dumosuin Mort., Org. Rein., p. 59, pi. 16, fig. 8, and fig. in text, 1834. 

 Spondylus dumosus Conr. , Cat. Eoc. Fos., Am. Journ. Conch., i., p. 14, 1865. 



Eocene of the Jacksonian horizon, St. Stephens, Clarke County, Cocoa 

 Post-Office, Choctaw County, etc., in Alabama; Red Bluff, Wayne County, 

 Carson's Creek near Shubuta, and Chickasawha River, Wayne County, Mis- 

 sissippi; Winchell, Burns, and Johnson. 



This well-defined species is unusually uniform in its characters and may 

 be easily discriminated from the next species by its longer and more con- 

 spicuous submargins. It also seems never to reach so large a size. 



Spondylus bostrychites Guppy. 

 Spondylus bifrons Sowerby, Ouart. Journ. Geol. Soc., vi., p. 53, 1849 ; not of Goldfuss, 



Petref., ii., p. 99, pi. 106, figs. 10 a-c, 1835. 



Spondylus bostrychites (nippy, Proc. Sci. Soc. Trinidad, p. 176, 1867; Gabb, Geol. St. 

 Domingo, p. 257, 1873. 



Oligocene of St. Domingo, at Ponton ; of the Bowden marl, Jamaica ; 

 of Anguilla; of White Beach, near Osprey, Florida, and in the Ballast Point 

 silex beds, Tampa Bay, Florida. 



Variety chipolanus : Chipola beds on the Chipola River; lower bed at 

 Alum Bluff, Chattahoochee River; Alum Bluff beds at Oak Grove, Santa 

 Rosa County, and the Ballast Point silex beds, Tampa Bay, Florida. 



The type form of this species has a relatively small number of spinosc 



