TRANSACTIONS OF WAGNER 

 QO4 



TERTIARY FAUNA OF FLORIDA 



sheet of manuscript with a drawing attached, which proved to be the original 

 MS. of Dr. J. E. Gray above alluded to. It is in Mrs. Gray's handwriting, 

 with the specific and generic names inserted in Dr. Gray's hand. It seems 

 that he received the specimens from Mrs. Mauger, who obtained them from 

 Canada. The first name inserted was not Clathrodon, but Cladodon, which 

 is crossed out and Gnathodon substituted for it. The drawing, exquisitely 

 made, is by E. I. Gray. Dr. Lea has endorsed on the envelope : " Wrote 

 Mar. 6, 1832, a second time for instructions respecting this." As the genus 

 had, several months earlier, been published by Sowerby, it is probable that 

 Dr. Gray paid no further attention to the matter. 



Rangia cuneata dray. 

 Gnathoilon ciincatns (Gray) Sowerby, den. Shells, No. 36, figs. 1-7, 1831 ; Dall, Mon. 



Gnath., Proc. U. S. Nat. Mus., xvii., p. 93, pi. vii., figs, i and 10, 1894. 

 Rangia cyrcnoidcs Desm., Actes Soc. Lin. de Bordeaux, v., p. 57, figs. 1-3, 1832. 

 Gna/lnnlon Grayi Tuomey and Holmes, Pleioc. Fos. S. Car., p. 99, pi. 23, fig. II, 1857 ; 



not of Conrad. 

 Gnathodon minor Holmes, Post-Pleioc. Fos. S. Car., p. 41, 1860. 



Pliocene of the Carolinas and of Florida, rather abundant in the Caloosa- 

 hatchie beds ; Pleistocene of Cornfield Harbor, Chesapeake Bay, and Wailes's 

 Bluff, Potomac River; of South Carolina, Florida, and the whole north coast 

 of the Gulf of Mexico, and of Matamoras, Mexico ; living in Mobile Bay, 

 Alabama, and westward to Vera Cruz, Mexico, in shallow, especially brackish, 

 water. 



The shell is variable in form, and very abundant when it occurs at all. 



Rangia clathrodonta Conrad. 



Afactra clathrodonia Conrad, Am. Journ. Sci., 1st Ser., xxiii., p. 340, 1833. 

 Gnathodon Grayi Conr., Medial Tert., p. 23, pi. 13, fig. i, 1838 ; Emmons, Geol. N. Car.. 



p. 298, fig. 226 a, 1858. 

 Gnatliodon minor Conr. (young shell), Medial Tert., p. 69, pi. 39, fig. 6, 1840; not of 



Whitfield. 



Rangia (Perissodon) clathrodonta Conr., Proc. Acad. Nat. Sci. Phila. 1862, p. 573, 1863. 

 Gnat/ifldiin clathrodon Dall, Mon. dnath. Proc. U. S. Nat. Mus., xvii., p. 95, pi. vii., 



fig. 9, f894. 



Chesapeake Miocene of James and York Rivers, Virginia, and North 

 Carolina, Conrad, Ruffin, and Yarrow ; Pliocene of the Croatan beds in North 

 Carolina, Johnson. 



This is the oldest species of the genus, but seems to be quite limited in 



