86 THE NAUTILUS. 



edge of the resiliifer; the right valve has a short, stout anterior and 

 a high, thin, elongate posterior lateral tooth; both the laterals fit 

 under the margin of the left valve with no obvious sockets. The 

 anterior end of the shell is longer than the posterior, and is rounded; 

 the shorter posterior end is subtriangular; the muscular scars are 

 large for the size of the valve, especially the posterior scar; the pallial 

 sinus is deep, high, rounded behind, confluent with the pallial line 

 below. 



Length 5.5, height 4.5, max. diam. 2.6 mm. 



Habitat: Bermuda. 



This shell is perhaps nearest to Anapella, which has no pallial 

 sinus and a simpler hinge-armature. I know of no other genus of 

 the family which can be said to approach it more nearly. 



A NEW BRACHIOPOD FROM BERMUDA. 



BY WILLIAM HEALEY BALL. 



Another of Mr. Haycock's interesting discoveries is a small brachi- 

 opod belonging to the genus Argyroiheca (formerly Cistella), which 

 occurs in the shell sand of Bermuda. 



AKGYROTHECA BKRMUDANA, n. sp. 



Shell minute, varying from nearly circular to slightly quadrate- 

 rounded, with a feeble concave median inflection of the haemal valve 

 which does not obviously undulate the distal margin. Color white, 

 clouded with pale scarlet; area wide, smooth, with a very large tri- 

 angular opening for the pedicel; surface smooth with rather large 

 punctations. Hinge teeth short, strong. Ventral valve with a me- 

 dian, rather low septum, extending nearly to the distal margin. 

 Haemal valve with a strong septum, widest distally and with a dis- 

 tinctly serrate front edge. Apophyses broad and horizontally in- 

 curved, and in large part free from the valve except near the septum. 

 The largest specimen is 2.5 mm. wide and about as high, moderately 

 convex. 



None of the specimens contained the remains of the animal. In 

 form and character this is a very distinct species; in color it may be 



