FREE INSTITUTE OF SCIENCE 



585 



TERTIARY FAUNA OK FLORIDA 



marls. By some misfortune nearly all the figures on this plate are numbered 

 discrepantly with the text. The figure of this species is No. 23. on'- the' -plate, 

 as can be determined by comparing the description with the fig.ur.ei Orj puge 

 397 of the same volume, published in November of the same year, Gabb 

 refers to the same species, describes and figures* (pi. 68, fig. 36) a Leda from 

 the Ripley group of Ilardeman County, Tennessee, which is undoubtedly 

 distinct from his original protexta of New Jersey. Not content with this, in 

 1864 (Pal. Cal., i., p. 199, pi. 26, f. 185) he refers a third species of Leda from 

 the Cretaceous of California to the New Jersey species of 1860. 



In 1865 Conrad described (Am. Journ. Conch., i., p. 213, pi. 21, fig. 2) 

 a cast of a Leda, distinct from any of the preceding, under the name of Yoldia 

 protexta, from the Eocene of Shark River, New Jersey. 



In 1866 (Smithsonian Checklist, Inv. Foss. N. Am., Eocene and Oligo- 

 cene, pp. 3, 4) Conrad catalogues a Nncitlana Gablrii from California without 

 comment, which Gabb (Pal. Cal., ii., pp. 197, 250, 1869) states is a new name 

 proposed for Leda prottxta Gabb of California, 1864. 



In the same Checklist Conrad (p. 4, No. 55) enumerates a Nitculana pro- 

 texta Conrad from Alabama of which nothing had previously been printed, 

 as well as his " Yoldia" (= Leda) protexta of New Jersey (p. 4, No. 65). The 

 latter is correctly referred by Conrad to his genus Nucidana (= Leda) in his 

 catalogue of the Eocene Testacea of the United States (Am. Journ. Conch., 

 i., p. 13, Feb.. 1865); and still later (Am. Journ. Conch., iii., p. 8, Apr., 1867) 

 he corrects the synonymy of this species by renaming it albaria, and transfers 

 it back to Yoldia, the wrong genus. 



In 1869 Conrad (Am. Journ. Conch., v., p. 98, pi. 9, fig. 24) describes as 

 a new genus Perrisonota, the internal cast of another Leda, which he called 

 Perrisoiiota protexta. Thus, in spite of the elimination of two species of this 

 specific name, there still remained three species, Gabb's Nos. I and 2 and 

 Conrad's last, all called protexta ! 



In 1885 Professor R. P. Whitfield (Brach. and Lam. of the Raritan Clays 

 of N. Jersey) took up the subject. For the first Leda protexta of Gabb he 

 adopts the name Niiculana protexta, and gives a new description (p. 105, pi. 

 xi., fig. 10) and a figure of the specimen from which it is supposed Gabb's 

 original figure of L. protexta was made. For Gabb's second protexta Whitfield 

 proposes the name Gabbana, and in illustration of it gives figures of a cast 



* The figure mentioned in the text is 35, but the number on the plate is 36. 



