GASTROPODA— FULGURIDJE. 



769 



540. F. caricum (Gmelin). Pliocenic-Recent. 

 Large (length up to 223 mm., width up to 120 mm.) with all 



the whorls strongly spinose on the shoulder angle, except the 

 earliest which bear only round nodes. 



Pliocenic of the Carolinas ; Pleistocenic and living Atlantic coast 

 from Cape Cod to West Indies. 



541. F. contrarium Conrad. (Fig. 1121, d.) Miocenic-Pliocenic. 



Fig. 1 121. {a-c, upper three, left to right; d, e, lower two) ; a, Fulgur rapum 

 var. ; b, F. tritonis ; c, F. maximus ; d, F. contrarium ; e, Sycotypus excavatus. All 

 XVz- (After Grabau.) 



Reversed; earliest whorls noded, adult smooth. 



Duplin beds of the Carolinas; Caloosahatchie beds of Florida. 

 (Reversed species with the character of F. tritonis or F. rapum 

 (F. obrapum Grabau) and one with the characters of F. caricum 

 (F. perversum) occur in the Pliocenic-Recent deposits of the 

 Atlantic coast. 



CLVI. Sycotypus Browne. 



Like Fulgur in form, but with a canaliculate suture and typi- 

 cally without spines, the tubercles of the young often uniting into 

 a smooth keel in the adult. Miocenic-Recent. 

 542. S. rugosus (Conrad). (Fig. 1122.) Miocenic. 



Shoulder angle nodulated throughout, the nodes in the adult 

 becoming broad and subconfluent. 



