THE NAUTILUS. 



VOL. x. MAY, 1896. No. 1 



NEW SPECIES OF LEDA FROM THE PACIFIC COAST. 

 BY WM. H. DALL. 



The species of Leda from the littoral zone nortli from Panama 

 are not numerous, though individuals are plenty in suitable locali- 

 ties. Leda hamata Cpr. is only known from the Sta. Barbara 

 Islands. Leda ccelata Hinds ranges from Bodega Bay to Lower 

 California in 6 to 60 fms. Leda fossa Baird is known from Bering 

 Sea to Puget Sound. Leda cuneata Sby., from Panama to Mon- 

 terey and also in the Atlantic. Leda minttta Fabr., a circumpolar 

 species, reaches south as far as Puget Sound on the Pacific. Omit- 

 ting some Arctic and abyssal species, the above-mentioned five spe- 

 cies include all hitherto recognized from the western coast of the 

 United States. I am now able to add three well defined species to 

 the list. 



Leda celhilita n. s. 



Shell solid, with a dull olive-gray epidermis, moderately convex, 

 with subcentral, not prominent beaks, base profound!}" arcuate, an- 

 terior dorsal slope rounded, posterior straight or slightly concave ; 

 posterior extreme bluntly pointed ; escutcheon large, transversely 

 striate ; lunule not differentiated but similarly striate; sculpture of 

 fine sharp, concentric grooves with wider interspaces, less arcuate 

 than the incremental lines ; chondrophore small, triangular, not 

 projecting, with 22 anterior and 16 posterior hinge teeth on the 

 cardinal border. Height 10-5; diameter 7'2 ; length 15'5 mm. 



Puget Sound near Port Orchard, dredged by the Young Natural- 

 ists' Society of Seattle, Wash. 



