PLEIOCENE FOSSILS. 99 



GNATHODON.— Gray. 

 The genus Gnathodon commenced its existence in the seas of the Meiocene period. 

 GNATHODON GRAYII. — Con. 

 Plate XXIII. Fig. 11. 



Gnathodon Grayii, Con., Foss. Ter. For., p. 23, pi. 13, fig. 1. 

 Gnathodon minor, Con., Silliman's Jour., Vol. 42, pi. 2, fig. 14. 

 Gnathodon minor, Con., Foss. Ter. For., p. 69, pi. 39, fig 6. 



G. testa subtriangulari, ventricosa, inaquilaterali; margine buccali obtuse rotundata; 

 margine anali angulari, cuneiformi; umbonibus valde promineniibus. 



Description. Shell sub-triangular ventricose, inequilateral; buccal margin obtusely 

 rounded; anal margin angular, cuneiform; umbones produced, prominent. 



Gnathodon minor we consider the young of G* Grayii, and have therefore placed it as 

 a synonym. This is an abundant species in the Post Pleiocene beds of South-Carolina, 

 and is found fossil near Wilmington, N. C. Though not living on the Atlantic shores of 

 the Southern coast, it abounds in the bays of the Northern coast of the gulf of Mexico. 



Plate XXIII. Fig. 11, Natural size. 



Locality. Waccamaw. Museum^ College of Charleston. 



SOLECURTUS.— Blain. 



SOLECURTUS CARIBCEUS.— Blain. 

 Plate XXIII. Figs. 12 and 13 



Solecurtus caribceus, Blain, Diet, des Sciences Naturelle, Vol. 29, p. 240. 

 Solecurtus caribceus, Con., Marine Conch., p. 22, pi. 4, fig. 3. 

 Solecurtus caribceus, Gould., Invert. Mass., p, 30. 



S. testa oblongo-ovali, recta, utrinque hiante; margine buccali el anali obtuse rotundalis; 

 margine palliali recta, leviter in medio compressa; umbonibus sub-centralibus, prominulis. 



