GUIDE 



TO THE 



FOSSIL INVERTEBRATA. 



I.— MOLLTTSCA. Moiiusca. 



odied, invertebrate animals, prov: 

 a highly glandular skin, and usually protected by a shell. 



The Moiiusca are soft-bodied, invertebrate animals, provided with yjj ^ yjjj 



Fig. 1. — Univalve shell of Scalaria pretiosa, Lamk. China. 



Part of the skin, or covering, which encloses the soft parts 

 of the animal is reduplicated on one or both sides of the body, it 



Fig. 2. — Univalve shell of Ampullaria canaliculafa, Lamk. S. America. 



B 



