TRANSACTIONS OF WAGNER 

 852 



TERTIARY FAUNA OF FLORIDA 



This species is rather common in the Pliocene marls of the Caloosa- 

 hatchie and Shell Creek. Stimpson reports having dredged a living Bothro- 

 corlntla in the deep water of Florida Strait ; he referred it to C. vitninca, but 

 it was probably this species. As the specimens were lost in the Chicago fire, 

 a positive identification must be delayed until the shell can be re-collected. 



C, contracta Say and C. disparilis Orb. have been mistakenly included 

 among Antillean Oligocene species. 



Miocene and Pliocene Species. 



The cooler waters of the Miocene epoch were less favorable to mollusks 

 of this genus than those of the Oligocene, and the species are not so numer- 

 ous. The \varm water of the Pliocene induced some of the subtropical types 

 to return, but the relatively short duration of this epoch may explain why but 

 a few species came in while it lasted. 



Corbula (Corbula) idonea Conrad. 



Corbula idonea Conrad, Am. Journ. Sci., xxiii., p. 341, 1833; Fos. Medial Tert., p. 6, 

 pi. 10, fig. 6, 1840. 



Miocene marl of New Jersey, Whitfield ; Calvert Cliffs, Choptank River, 

 St. Mary's River, Jones's Wharf, and Plum Point, Maryland. 



This, the finest of our Tertiary Corbulas, belongs to the typical section. 



Corbula (Aloidis) elevata Conrad. 

 Corbula elevata Conrad, Fos. Medial Tert., p. 7, pi. 4, fig. 3, 1840 ; Whitfield, Miocene 



N. J., p. 86, pi. 15, figs. 15-19, 1895. 



Corbula Icvata Meek, Geol. N. J., p. 297, 1863. (Typographical error.) 

 Corbula curta Conrad, Am. Journ. Conch., iii., p. 269, pi. 21, figs. 6-8, 1867. (Decor- 

 ticated shell.) 



Miocene marl of Shiloh, New Jersey, Burns ; Plum Point, Patuxent 

 River, and other localities in Maryland, Burns and Harris. 



This is a rather large and tall shell, usually in poor preservation and 

 frequently entirely stripped of its outer coat, as mentioned in connection with 

 C. oniscus. In this latter state it is the curta of Conrad. 



C. (Aloidis) galvestonensis Harris (Bull. Pal., iii., p. 94, pi. 2, figs. 5, 5 a, 

 1895), from the Upper Miocene of the Galveston artesian well, between the 

 two thousand four hundred and forty-three and two thousand six hundred 

 and fifty foot levels below the surface, is a small shell, recalling perdiibia 

 Gregorio or laqncata Conrad. 



