1890.] 



NATURAL SCIKNCES OF PHILADELPHIA. 



441 



DESCRIPTION OF A NEW JAPANESE SCALPELLUM. 

 BY HENRY A. PILSBRY. 



Ill a collection of Japanese Mollusca and Cirripedia recently sent 

 the writer for determination, numerous specimens of a very large 

 Scalpellum, which proves to be of a new species, were found. The 

 specimens were collected by Mr. Frederick Stearns, of Detroit, 

 Michigan, and it seems but just to connect his name with this form, 

 in recognition of the value of his additions to the Japanese fauna. 

 Scalpellum Stearnsii sp. nov. 



Valves fourteen, wholly calcified ; carina distinctly bent near the 

 the middle, with the umbo at a considerable distance from the apex ; 



upper latus pentagonal ; 

 infra-median latus much 

 smaller than the upper 

 latus, subquadrangular, its 

 altitude scarcely exceeding 

 its breadth ; carinal latus 

 narrow, crescent shaped, 

 projecting below the carina 

 in a strong recurved hook; 

 rostral latus narrow, lanceo- 

 late. Rostrum short, tri- 

 angular. 



Capitulum rhomboidal, 

 compressed. 



Scutum large, longer than 

 broad, its apex projecting 

 a trifle over the terguni. 



The tergum is large, tri- 

 angular; occludent and 

 scutal margins slightly con- 

 vex, carinal margin con- 

 cave ; apex erect, a trifle 

 recurved. 



Carina much curved, 

 strongly angled at the 

 umbo, the distance of which 

 from the apex is a little over one-third the length of the valve ; the 



