NO. 2116. ANATi:t^ACEA FROM WEST COAST OF AMERICA— BALL. 449 



A variety eutaenia of this species with a more rostrate posterior 

 end and averaging larger than the typical form was obtained at Port 

 Etches and eastward at Sitka, in Alaska. Cat. No. 171062, U.S.N.M. 



KENNERLYIA FILOSA Carpenter, 1864. 



Distribution. — From the vicinity of Nunivak Island, Bering Sea, 

 south and eastward to San Pedro, California. Cat. No. 4542, 



U.S.N.M. 



KENNERLYIA BILIRATA Contad. 1855. 



+ K. hicarinata Conrad, 1864. 



Distribution. — Forrester Island, Alaska, southward to Point Abre- 

 ojos. Lower California. Cat. No. 1063, U.S.N.M. 



KENNERLYIA GRAITDLATA, new species. 



SheU closely resembhng in form the bilirata, but much smaller, 

 more translucent, and of a greenish tint, with the base and dorsal 

 margins more nearly parallel and with the elevated lirae of the poste- 

 rior dorsal surface dehcately granulated. 



Length, 8.5; height, 4; diameter, 1; beaks behind the anterior 

 end, 1 mm. 



Distribution. — Santa Barbara, Cahfornia, to Guaymas, Mexico, and 

 especially abundant at the type locaUty on muddy bottom in the 

 vicinity of La Paz, Lower Cahfornia. Cat. No. 211348, U.S.N.M. 



This minute species is extremely common in shallow water with a 

 muddy bottom near the end of the Lower Cahfornia peninsula. It 

 shows on the flat valve hardly any trace of the brown radiating irreg- 

 ular Hnes so common in species of this group. 



KENNERLYIA CONVEXA, new species. 



SheU short, deep, with a very convex left valve and a nearly semi- 

 circular outline; right valve flattish, concave near the basal margin, 

 white, with a conspicuous velvety brownish periostracum, espe- 

 cially on the rostrate end; a few irregularly radiating Hnes on the 

 disk; dorsal margins nearly straight, base evenly rounded, left valve 

 slightly rostrate behind ; exterior of the left valve with a few obscure 

 sHghtly elevated radial hnes on the disk and two posterior dorsal 

 radial hrations. Hinge very feeble, resilium short, with a thick 

 Hthodesma; teeth in the right valve closely adjacent, small. Length, 

 21; height, 12; diameter, 3.5; beaks behind anterior end, 5.5 mm. 



Distribution. — Type locaHty, Ballenas Lagoon, Lower Cahfornia, 

 in 48 fathoms. Cat. No. 171068, U.S.N.M. 



This is a well-marked form, with the anterior area of the left valve 

 not set off by an impressed hne, but marked by a distinct inset at 

 the basal margin. 



81022°— Proc.N.M.vol.49— 15 29 



