252 



EXPLANATION OF PLATE 27 

 Figure Page 



187. Modulus modulus (Linne) 138 



188. Modulus modulus floridanus Conrad 139 



Fig. a. Basal view. Fig. b. Dorsal view. 



189. Triphora perversa nigroeincta (C. B. Adams) 139 



190. Cerithiopsis greeni (C. B. Adams) 140 



191. Cerithiopsis emersonii (C. B. Adams) 140 



192. Sella adamsii (H. C. Lea) 140 



193. Cerithium algicola C. B. Adams 141 



194. Cerithium floridanum Morch 142 



195. Cerithium variabile C. B. Adams 142 



196. Batillaria minima (Gmelin) 143 



197. Batillaria minima septemstriatsi (Say) 143 



198. Cerithium muscarum Say 142 



