REPORT ON THE CIRRIPEDIA. 115 



Canned latus large, penetrating with its upper part between the carina and the upper 

 latus. Lateral margin convex, carina! margin hollowed oul in the uppermosl portion, 

 the inferior portion being nearly straight, basal margin as long as the inferior portion of 

 the carinal margin. 



Length of the capitulum, 8 mm. 



Peduncle short, about one-third the length of the capitulum. Totally covered by 

 scales, which are placed on very regular longitudinal rows. Each of these rows, of which 

 there are about seven, contains eight scales. 



I have not been able to study the structure of the animal within the capitulum, nor 

 have I observed the complemental male. 



The species was taken at Station 246, July 2, 1875; lat. 36° 10' N., long. 178° 0' E.; 

 depth, 2050 fathoms; bottom temperature, l° - 3 C; bottom, grey ooze. 



Scalpellum vitreum, n. sp. (PI. V. fig. 14). 



Surface of the valves smooth, not covered by membrane, beautifully striated. Valves 

 thirteen. Carina simply, only slightly, bowed, with the roof Hat. Umbo of the carina 

 at the apex. Upper latus trapeziform. Infra-median latus small, triangular. Other 

 valves of the lower whorl well-developed. Peduncle short. 



This species is represented by a single specimen only. It is medium-sized, and belongs 

 to the species with the valves of the lower whorl well-developed. 



The capitulum is elongate, not quite twice as long as broad, very flat, and consisting 

 of thirteen valves only. The surface of the valves is nut covered by membrane, therefore 

 smooth. The smoothness, however, is incomplete, as the valves are furnished with parallel 

 and very delicate ridges, which are in a perpendicular or in a somewhat oblique direction 

 to the lines of growth. The lines of growth are only very imperfectly visible. 



The scutum is quadrilateral, with the occludent margin convex, the basal margin 

 slightly hollowed out, the lateral margin straight, and the tergal margin straight also, and 

 only slightly hollowed out in the anterior part. The umbo is at the apex, which i> a 

 little produced, and projects over the tergum. 



The tergum nearly equals the scutum in size, its occludent margin is convex, the two 

 other margins are nearly straight; the carina] margin is considerably longer than the 

 scutal margin. 



The carina is long and has a Hat roof. At its inferior extremity this roof has a con- 

 siderable width, which slopes towards the apex, where the umbo is situated. The sides 

 in the undermost part of the valve are narrow and at right angles with the roof; in the 

 superior part, however, they are broader, and at angles greater than 90 with the roof. 

 Here these sides are delicately but very distinctly furrowed. 



