MACOMA. 195 



and bent to one side behind. The hinge-teeth are 

 small, the ligament external, and in one valve the 

 pallial sinns reaches to the forward muscle scar. Its 

 color is white, and its common length is two inches. 

 Macoma inquinata, Cpr., iu-qui-na'-ta, a northern 

 species, resembles a small specimen of the last. In 

 this, however, the pallial sinus does not touch the 

 forward muscle scar in either valve. Shell white, an 

 inch and a half in length. 



Macoma inconspicua, Brod. and Sby., in-con-spik'- 

 u-a, Fig. 166. This little mollusk has a thin, flat, 

 pink or white shell, about half an inch 

 in length. It is found from Monterey 

 to Puget sound. Dead specimens are 

 frequently washed up near the Cliff 

 Fig. 166. House, in San Francisco. 

 Macoma indentata, Cpr. , in-den-ta'-ta, resembles a 

 small specimen of M. sect a, but the lowest edge of 

 the shell, near the rear end, is indented and beaked. 

 Thin, white, glossy, southern. 



We now have a group of little shells to examine, 

 which belong to the same great family as many of 

 those we have been studying, namely the Tellinidce^ 

 or Tellens. The first one is shown in Fig. 167, and 

 its name is Angulus modestus, Cpr., mo-des'-tus; and 

 in fact it is a modest little thing, with a 

 shell thin, white and glossy, and marked 

 with fine concentric lines. The liga- 

 ment is external, the pallial sinus very 

 Fig. 167. deep, and there is an internal ridge near 

 the forward muscle scar. It is a northern shell, about 

 three-fourths of an inch long. 



Angulus obtusus, Cpr., ob-tn'-sus, resembles the last 

 species, but has more obtuse beaks. By this is meant 



