FREE INSTITUTE OF SCIENCE 



701 



TERTIARY FAUNA OF FLORIDA 



sandstones of Ocoya Creek. No types of them exist, and the figures are so 

 bad that it is to be feared they will remain for a long time unrecognized. 



Section Lyropcctcn Conrad. 



Lyropecten Conr. , Proc. Acad. Nat. Sci. Phila. for 1862, p. 291 ; Meek, Smithsonian Clieckl. 

 Mio. Fos., pp. 5, 27, 1864. Type Pallium estrellanwn Conr., Pac. R. R. Rep., vi., 

 Gaol., p. 71, pi. iii., fig. 15, 1856; Proc. Acad. Nat. Sci. Phila., viii., p. 313, 1857; 

 Liropecic7i esirellanum Cooper, Bull. State Mining Bur. Cala., No. 4, pi. 6, figs. 65-67, 

 1884 (text excl.). Not P. esirellanum Conr. of Pac. R. R. Rep., vii., p. 191, pi. 3, 

 figs. 3-4, ■= P. volaformis Conr., Proc. Acad. Nat. Sci. for 1862, p. 291. 



Liropecten Gabb, Pal. Cal. , ii., p. 105, 1869. 



Not Lyropecten Conrad, Am. Journ. Conch., iii., p. 6, 1S67. Type P. crassicardo Conr., 

 Proc. .Acad. Nat. Sci. Phila. for 1862, p. 291. 



Not Liropecten Fischer, Man. de. Conchyl., p. 944, 1887. Type P. nodostis Linne. 



Not Lyropecten Verrill, Trans. Conn. Acad. Sci., x., p. 63, 1897. Type P. nodostis Linne 

 (following Fischer). 



Not Lyriopecten Hall, 1883, := section of Avictilopecten. 



Among the types of the Pacific Railway explorations is a fossil Pecten 

 with a label " Estrella Valley" in Conrad's handwriting. The ears have been 

 broken off, but in other respects it agrees well with the description and figure 

 of Pallium estrellamim. The ribs are worn flat, and the undulations mentioned 

 in the description are due to erosion. It is the only specimen agreeing at all 

 closely with the requirements, and I have no doubt it is one of the specimens 

 from which Conrad's description was prepared. Better preserved fragments 

 show the intercalary line clearly, and also that the ribs were imbricated, as in 

 P. Jeffcrsonius, by minute elevated scales. It is, in short, a Pecten belonging 

 to the same group as P. Jeffcrsonms, Madisoniits, crassicardo, etc. Curiously 

 enough, the same specimen served as the subject for Conrad's P. Heermanni 

 (Proc. Acad. Nat. Sci. Phila., vii., p. 267, 1855), described in a line and a half 

 and never figured. The two were identified by Conrad as the same species 

 on the National Museum labels. In the confusion that surrounds the specific 

 name estrellamim (three species of Pecten from the same region having been 

 so named by Conrad), it is probably better to revert to the earlier name of 

 Heermanni. A fair figure, cited above, has been given by Cooper. 



The type of the second form, named estrellanum, is lost. It appears to 

 have been a shell resembling Pecten dentatiis Sby. in outline, but the sculpture 

 and number of ribs agree with the original estrellanus. Conrad renamed it L. 

 volceformis, but the difference of shape may be due to crushing, as the fossils 



