NO. 1210. SYNOPSIS OF NORTH AMERICAN TELLINIDJE—DALL. 307 



MACOMA KRAUSEl Dall, 1900. 



Icy Cape .south to the Aleutian.s and ea.st to the Shumagin.s, Green- 

 land ? 



Thi,s is Tellina lutea A. Krau.se, 1885, not of Gra3% 1828. I have 

 received a very .similar form from Greenland and Spitsbergen. The 

 species is characterized b}^ its oval compressed form, low posterior 

 beaks, and short, hardly flexed posterior end. 



MACOMA EDENTULA Broderip and Sowerby, 1839. 



From Berino- Strait southward to the Aleutians and Japan and east- 

 ward to Port Etches, Alaska. 



This .splendid species is rare, and has been much confused by authors. 

 It is the Ttllina lata of Middendorfl', 1851, in part, but not of Gmelin. 

 It is notable for its large size, blunt transverse form, and rather smooth 

 surface, often with a ferruginous flu.sh. The pallial .sinus is unusually 

 short and free for the genus. Tellina edentula Spengler, 1798, is a 

 Metis. 



MACOMA CALCAREA Gmelin, 1792. 



Arctic Ocean generally and on the Pacific south to the Okhotsk and 

 Japan seas on the west and to the Aleutians and Oregon on the east. 



The .synonymy of this species has been indicated in the Atlantic 

 coast list. 



MACOMA SITKANA Dall, 1900. 



Kadiak, Alaska, south to Sitka (15 fathoms). 



Shell like Macoma calcarea^ but more slender, more equilateral, less 

 flexuous, with the pallial sinus more regular, oval, and confluent 

 below, and with the posterior end somewhat recurved dorsallv. 



MACOMA INQUINATA Deshayes, 1854. 



Bering Strait to Monterey, California, on the east and to Japan on 

 the w^est. 



This variable, but on the whole veiy recognizable, species has been 

 confused with Macoma incongraa Martens, calcarea Gmelin, and nasuta 

 Conrad. 



MACOMA INFLATULA Dall, 1897. 



Aleutian Islands and southward in constantly deeper water to Bal- 

 lenas Bay, Lower California. 



Characterized by its strong flexure, pointed posterior end, thin in- 

 flated shell, and greenish periostracum. 



MACOMA NASUTA Conrad, 1837. 



Kadiak Island, Alaska, to Lower California. 



This well-known species has not been s6en by me from west of 



