MOLLUSKS FROM THE VICINITY OF PERNAMBUCO I45 



Natica canrena Lamarck. 



Managuas. 

 Natica livida Pfeiffer. 



Rio Parahyba, Mangosoules and Maceio ; on sand beaches. 

 Natica marochiensis Gmelin. 



Mamanguape, Mangosoules and Managuas. 

 Acmaea onychina Gould. 



Mamanguape and Goyanna. 

 Turbo Spenglerianus Gmelin. 



Managuas. 

 Astralium latispina Philippi. 



Mangosoules, Rio Parahyba and Managuas. 

 Astralium imbricatum Gmelin. 



Mamanguape and Maceio ; common. 

 Astralium armatum Philippi. 



Goyanna. 

 Omphalius viridulus Gmelin. 



Mamanguape, Maceio, Goyanna and Pernambuco ; common. 

 Neritina virginea Lamarck. 



Rio Parahyba, Managuas, Mangosoules, and Goyanna. The| shells 

 are usually smaller than those found in the Antilles but pass through 

 the same multitude of color variations. 

 Subemarginula octoradiata Gmelin. 



Maceio. 

 Fissurella rosea Gmelin. 



Mamanguape, Maceio and Goyanna. 

 Fissuridea alternata Say. 



Maceio and Goyanna. 

 Fissuridea Listeri d'Orbigny. 



Maceio ; one young shell. 

 Ischnochiton squamulosus C. B, Adams. 



Maceio ; one young specimen. 

 Octopus sp. indet. 



One very yovmg specimen from the reefs. 



DESCRIPTION OF THE NEW SPECIES. 



Mulinia Branneri Dall. 

 Shell small, solid, elevated., short, subtriangular, white under a pale 

 brownish periostracum ; beaks high, full, subcarinate behind ; an ob- 

 scure impressed line in front proceeding from the beaks delimits a 

 Proc. Wash. Acad. Sci., April, 1901. 



