SMALL BIVALVES. 



that the ligament continues in a nearly straight line 

 with the upper edge of the shell, while in modestiis^ 

 as shown in Fig. 167, it slants sharply downward. 

 The shell is white, about an inch in length. 



Angidics Goiddii^ Hanley, Gould^-i-i, is small, oval, 

 inflated, a little angled at the beaks and slightly bent 

 at the posterior end. About half an inch long; 

 southern. 



Anguhis variegatus^ Cpr., va-ri-e-ga-tus. Similar 

 in shape to Fig. 167, but smaller. Pink and white, 

 glossy, flat and narrow, hardly half an inch long. 



CEdalia siib-diaphana^ Cpr., E-da^-li-a sub-di-af- 

 a-na. This species has a thin, white, glistening shell, 

 which appears quite swolen. The hinge- teeth are 

 central, and the short ligament is situated almost 

 between the prominent beaks. Length half an inch ; 

 southern. 



Fig. 168 gives us a good idea of the shape of our 

 next shell, Oimingia Californica^ Conr., Cum-in'-gi-a 

 Cal-i-for'-ni-ca. It is somewhat 

 triangular in outline, with the 

 front end rounded, and the rear 

 end narrower and slightly twisted. 

 The lines of growth are very dis- 

 tinct, forming concentric ridges. 

 The shape of the shell varies con- 

 siderably in different specimens. Pallial sinus large, 

 color white, length about an inch. It is occasionally 

 found in Monterey bay, but is more common to the 

 southward. 



A very pretty little shell sometimes found at Mon- 

 terey and sometimes far to the north, is named Moera 

 salnionea^ Cpr., Me'-ra sal-mo'-ne-a. It is nearly 

 rectangular in outline, the beaks being near one cor- 



Fig. 16S. 



