REPORT ON THE CIRRIPEDIA. 127 



Scalpellum flavum, n. sp. (PL VI. fig. 9; PI. X. figs. 7-9). 



Valves thirteen, covered by a thin chitinous membrane. Carina very Long, -imply 

 bowed, with the umbo at the apex ami the roof laterally convex. Upper latns verj large, 

 quadrangular. Infra-median latus narrow. ( 'urinal latus elongate, large, with the umbo 

 near the base. Peduncle very short. 



Three full-grown specimens of this little Scalpellum were brought up with the dredge, 

 together with a specimen of Scalpellum brevecarinatum. The species is nearly related to 

 Scalpellum novce-zelandice. 



Capitulwm flat and elongate, and consists of thirteen valves. The valves are covered 

 by a thin chitinous membrane : they do not show distinct lines of growth. The elongate 

 form of the eapitulum is partly due to the length of the valves of the lower whorl, 

 partly to the length of the other ones. 



Scutum quadrangular, a little more than twice as long as broad. Umbo at the apex, 

 which slightly projects over the tergum. Lateral and occludenl margins almost parallel, 

 only very slightly arched, basal margin slightly arched. 



Tergum triangular, with the occludent margin short and the two others long. The 

 scuta! margin is straight, the carina! margin distinctly arched. The occludent margin is 

 very slightly arched. 



Carina simply, rather strongly, bowed; very large; the umbo, which is at the apex, 

 reaches to a short distancefrom the apex of thetergum. The roof is not quite flat, but laterally 

 slightly convex. The sides are about of the same width over the whole length of the carina. 



Upper latus quadrangular, the carina! margin parallel with the scutal margin. The 

 edge formed by the basal and the scutal margins is truncated ; hence the valve is. pro- 

 perly speaking, pentagonal. The scutal margin, at the end of which the umbo is placed, 

 does not reach over the scutum. 



Rostral latus almost triangular, the basa! margin being very short. Umbo slightly 

 protuberant beyond the occludent margin of the scutum. Scutal margin hollowed out. 

 Lateral margin slightly arched. 



Infra-median latus high and narrow ; umbo a little beneath the middle, where the 

 valve is a little narrower still than at the upper and lower extremities. 



Carina/ latus of an irregular elongate shape. The lateral margin describes a very 

 obtuse angle with the upper margin. A large triangular portion of the valve is enclosed 

 between the upper latus and the carina. The carina! margin is slightly concave in the 

 upper part. The umbo is at the base of the carina, and separated from the peduncle by 

 the short lower part of the carina! margin. Basal margin rather long. 



Length of the eapitulum, 7 '5 mm. 



Peduncle very short and narrow, and not placed in the prolongation of the eapitulum ; 

 its direction forming an angle of about 135° with that of the eapitulum. Scales pro- 



