TRANSACTIONS OF WAGNER 

 826 



TERTIARY FAUNA OF FLORIDA 



This species can be readily recognized by its vast hiatus, nearly as long 

 as the shell, and the rather blunt and wide posterior termination of the valves. 

 Roccllaria antiqua Gabb from the Miocene of James River, Virginia, has not 

 been figured, but the description (Proc. Acad. Nat. Sci. Phila., 2d Ser., v., p. 

 368, 1861) reads very much like the present species. 



Genus FISTTJLANA (Bruguiere) Cuvier. 

 Fislnhina Bruguiere, Enc. Melh., i., p. xii., 1789; ib., pi. 167, 1792; name only, no 



species cited; Cuvier, Tabl. Elem. Hist. Nat., p. 432, 1798; {Teredo clava Linne ;) 



Lam., Prodrome, p. 90, 1799 (same type). 

 Chcena Gray, P. Z. S., 1858, p. 315 ; (not of Retzius, 1788.) 

 Gastrochtrna Tryon, Man. Pholad., p. 38, 1862 ; (not of Cuvier ;) Cossmann, Eoc. Bassin 



de Paris, i., p. 9, 1886. 



Bruguiere was the first to name Fistnlana, though he did not describe it 

 or cite any species. Cuvier supplied a type, and this was adopted by Lamarck. 

 For some time later, however, Fistulanas and Gastrochaenas were confounded 

 in lists of the genus, while Gray injudiciously endeavored to utilize Clucna as 

 a name for this group. Tryon became badly confused on the generic nomen- 

 clature of this group, which was rectified by Fischer in 1866. 



Conrad (Fos. Tert. Form., p. 34, 1835) enumerates Fistidana clongata Des- 

 hayes as a member of the Claiborne fauna, but it does not appear in his later 

 lists, and may very possibly be the shell he called F. larva, which is a Gastro- 

 chcsna. The only possible Fistnlana,SA here restricted, which appears to have 

 been reported from the American Tertiarics, is F. f avails Say (as Plwlas), 

 1820, from the Miocene of Maryland, which has never been figured, and of 

 which the type specimen seems to be lost. It is represented as being con- 

 tained in a tube, yet also as boring into Pcrna torla, which suggests Gastro- 

 cluzna. I am now able to include the genus in our fauna from an earlier 

 horizon. 



Fistulana ocalana n. s. 

 I'I.ATE 35, FIGURE 23. 



Oligocene of the Ocala or nummulitic limestone, Ocala, Florida; Willcox. 



Tube straight, claviform, with slight indications of annulation and ad- 

 herent extraneous matter; anterior end larger, anterior disk convex, sub- 

 circular. Lon. (incomplete) 55, lat. (ant.) 12.5, (post.) 9 mm. 



Though the specimen is merely a limestone cast of an external mold of 

 the tube, there can be no question as to the generic place of the species. 



