AMERICAN JOURNAL OF CONCHOLOGY. 



Flate 5. 



^'^ 



Fig. 1. Jaw of Gyclotus stramineus, Bv. magnified. 



a. Ndt. sizfi. b. Scales on the .surface, raagnifled. 



" 3. Jaw of Megalomastoma cylindraceum., CJiemn, magnified. 



a. Xai. size. b. Scales oil the surface, magnijied. 

 " 3. Teeth. Megalomastoma Antillarum, Sowb. 

 " L Teeth. Cydotus stramineus., Rv. 



