MOLLUSCA 191 



Colus gracilis DaCosta 



PLATE XX. Fig. 2 



Another northern species which probably lived 

 in New Jersey waters (luring' the Glacial period; 

 one fossil shell has been found on the beach at 

 Asburv Park, N. J. 



Fig. 32 



Egg case of Conch (Fulgur) 



Fulgur carica Gmelin 

 (Busycon caricum Gmelin) 



(Knobbed Conch 



PLATE XIX. Fig. 3 



The conchs are the largest gastropod shells 

 north of Cape Hatteras. They may be seen crawling 

 among the Eel Grass in shallow water or may be 



