CONCHOLOGY. 



PLATE LVI, 



FIGURE I» 



TEREBRATULA CRUENTA 

 BLOOD-SPRINKLED TEREBRATULA. 



OR 



LAMP ANOMIA. 

 Bivalve. 



generic character. 



Shell inequivalve regular, somewhat triagonal : upper valve 

 imperforate, lower valve beaked above the hinge, the beak usually 

 incurvate, perforated at the tip or grooved for the passage of a short 

 tendinous pedicle, by means of which it adheres to other bodies. 

 Hinge with two teeth and two osseous elevated and furcated pro- 

 cesses, arising from the disk of the upper or smaller valve, and des- 

 tined to support the animal. 



