76 APPENDIX. 



Long. .20 ; Lat. .16 inch. 

 &quot; 5; &quot; 4 mill. 



Hab. North America, Canoe Creek in California. (Cabinets of the 

 Smithsonian Institution and Prime.) 



Remarkable for its spherical and flattened appearance ; it is 

 unlike any other species indigenous or foreign. 



15.&quot; Pisidium consanguineum, PRIME. Testa minuta, 



versa, rotundato-ovata, insequilaterali, compressiuscula ; mar- 

 Fig. 86. ginibus rotundatis ; tenuissime striata ; umbonibus tumidi- 

 usculis. 



Shell small, transverse, rounded-oval, inequilateral, not 



much inflated ; margins rounded ; beaks somewhat apiculated ; 



striae very delicate ; epidermis light horn color ; teeth robust. 



Long. .16 ; Lat. .12 ; Diam. .12 inch. 



4; &quot; 3; &quot; 3 mill. 



Hab. Retiro, Monte Verde and Catalina da Guarra, Cuba, West Indies 

 (fide Wright). (Cabinet of Smithsonian Institution, Wright, Wheatley, 

 and Prime.) 



Yery closely allied to Pisid. abditum, from which it is very 

 difficult to distinguish it. 



