MOLLUSKS FROM THE VICINITY OF PERNAMBUCO I4I 



LIST OF THE SPECIES OBTAINED. 



Ostrea puelchana d'Orbigny. 



Mangosoules, Managuas and Macelo. 

 Ostrea equestris Say. 



Managuas ; attached to the shells of Cerithium algicola. 

 Spondylus echinatus Marty n. 



Mamanguape ; a single young valve. 

 Lima inflata Lamarck. 



Maceio. 

 Margaritifera radiata Leach. 



Goyanna ; a single young valve. 

 Mytilus exustus Linne. 



Maceio ; young shell from oysters. 

 Mytilus exiguus Dunker. 



Mamanguape ; young shells. 

 Modiolus (Gregariella) coralliophagus Gmelin. 



A single specimen at Cotonello Bay and another from a rock reef at 

 Goyanna. This form is remarkable for the series of four or five sharp 

 conical teeth on the hinge on each side of the largely internal ligament. 

 These teeth are below the line of the marginal serrations. The exterior 

 of the shell is covered with a concretionary layer which completely 

 hides the posterior part of the valves and must act as a sort of oper- 

 culum closing the entrance of its burrow against enemies and protect- 

 ing the mollusk. This layer, like that on Diberus^ must be partly due 

 to the animal itself. 

 Lithophaga (Diberus) antillarum d'Orbigny. 



Mamanguape, Maceio, Goyanna and Pernambuco ; in coral. 

 Lithophaga nigra d'Orbigny. 



Boa Viagem ; one specimen. 

 Area umbonata Lamarck. 



Common on the reefs at Goyanna, Mamanguape, Pernambuco, 

 Maceio and Boa Viagem. 

 Area Adamsi (Shuttleworth) Smith. 



Maceio, Mamanguape and Goyanna. 

 Area (Seapharca) Deshayesii Hanley. 



Pernambuco ; one valve. 

 Area (Cunearea) brasiliana Lamarck. 



Mamanguape ; one valve. 

 Phaeoides pectinatus Gmelin. 



Mangosoules. 



