THE BARNACLES IN THE U. S. NATIONAL MUSEUM. 



23 



SCALPELLUM STROEMII LaTIROSTRUM, new subspecies. 

 Plate I, fig8. 11, 12, 13, 14. 



Type.—^o. 10780, U.S.N.M. 



Type-locality. — AJhatroKs Station ^527, north latitude 41'^ 59', west 

 longitude 65^ ?>5' 30", southeast border of Georges Bank, in 117 

 fathoms. 



The rostrum is trianguhir, much broader at the base than in any 

 other known form of the stroemii group. Rostral latera about as in 

 S. stroeiiiii. Inframedian lateral plate generally short and wide, 

 with the umbo at the lower third or slightly below the middle of the 

 rostral margin. Roof of the carina flattened, with more or less distinct 

 bordering ribs. Length of capitulum 11, width 6, diam. 4 mm. 



This form has the capitulum swollen laterally at the lower whorl of 

 plates, and is distinguished by the very wide rostral plate. 



Plate I, tigs. 15, 16, represent a form 

 somewhat intermediate between latl- 

 rostrum and suhstroemll in the shape of 

 the rostrum. The figures are drawn 

 from No. 90l>0, U.S.N.M. 



SCALPELLUM PRESSUM, new species. 



Type.—^o. 32903, U.S.N.M. 



Type-locality. — Le Have Bank, 300 

 fathoms. Captain Johnson donor. 



(Hher localities.— ^os. 9027, 9024, 

 U. S. Fish Commission, Station 1124, 

 off Marthas Vineyard. No. 32904, h 

 Albatross Station 2668, north latitude 

 30° 58' 30", west longitude 79° 38' 30", 

 off Fernandina, Florida, 294 fathoms. 

 No. 10778, Albatross Station 2470, off Nova Scotia, 224 fathoms. 

 No. 32905, Albatross Station 2527, off Georges Bank. 



The capitulum is compressed, widest above the middle, tapering 

 toward the base which is quite narrow; composed of 14 plates, which 

 are irregularly marked with concentric wrinkles and a- few weak 

 radial strife. The occludent border is convex, chiefly so in its upper 

 half. 



The scutum is about twice as long as wide, the occludent ^o^der but 

 slightly convex. The oblique basal margin is a little shortti than the 

 lateral. 



The tergum has a convex occludent margin. The apex is recurved. 

 The carinal margin is a little concave above the carina, straight where 

 in contact with it. 



Fig. 6. — ScALPELLrM presscm. a, ven- 

 tral view; ;*, LATERAL VIEW. X O. 



