SYNOPSIS GENERUM. 



Family 5. Ostracea. 



Ostrea. Placunanomia. 



Placuna. Anomia. 



Class II. BRACHIOPODA. 



Family 1. Tendinosa. 



Class III. GASTEROPODA. 



Order I. Cirrobranchiata. 

 Dentalium. 



Order II. Cyclobranchiata. 



Chiton. Patella. 



Cbitonellus. 



Order III. Cervicobranchiata. 



Family 1 . Fissuracea. 

 Lottia. Emarginula. 



Siphonaria. Fissurella. 



Parmophorus. 



Family 2. Capulacea. 



Crepidula. Hipponyx. 



Calyptrsea. Pileopsis. 



