KEPU11T ON THE CIRRIPEDIA. 6U 



Carina simply bowed, with a flat roof and well-developed sides, tapering towards the 

 lower extremity. The roof does not increase much in width from the upper to the lower end. 



Upper latus of a quadrangular form ; the calcified part is semi-lunar, with the umbo 

 at a short distance from the apex ; the valve, therefore, is also a little added to upwards. 



Rostral latus quadrangular, middle sized ; lateral margin arched. 



Infra-median latus triangular, small ; umbo at the apex. Rostral and carina! margins 

 hollowed out. 



< 'arinal latus almost triangular, with the umbo near the base, slightly projecting out- 

 wards beyond the carina. Carina] margin hollowed out, lateral margin short and rounded. 



Length of the capitulum, 1G mm. 



Peduncle cylindrical, slightly bowed. Length of the peduncle, about 5 mm. Covered 

 by membrane ; the free edges of the scales are only indistinctly visible. There are seven 

 or eight longitudinal rows of scales, each row containing ten or more scales. 



This species was taken in the Atlantic at Station VI., January 30, 1873 ; hit. 3G° 23' 

 N.,long. 11° 18' W.; depth, 1.525 fathoms; bottom temperature, l° - 6 C; bottom, Globi- 

 gerina ooze. 



Observations. — The complemental male of this specie;; is not known, nor could I 

 investigate the structure of the parts of its mouth, cirri, &c. 



Scalpellum ovatum, n. sp. (PL VI. figs. 7, 8). 



Valves thirteen, covered by chitinous membrane, without distinct spines. Tergum 

 and upper latus imperfectly calcified, the calcified portion of the latter being V-shaped. 

 Umbo of the carina close to the apex. Carina with a flat roof, not much increasing in 

 width from the upper to the lower extremity. 



Of this species a single specimen was taken at Station 216, at which Scalpellum mar- 

 ginatum, n. sp., was also taken. I was a long time in doubt whether it represents a 

 different species, or must be considered as a variety of Scalpellum marginatum. I even 

 felt inclined to consider it as an intermediate form between Scalpellum marginatum and 

 Scalpellum compressum. After much hesitation, however, I decided on describing it as 

 a distinct species. 



The capitulum is rather flat, though not so much so as in Scalpellum compressum, and 

 elongate, being about twice as long as broad. The greatest breadth is a little beneath 

 the umbo of the scutum. The capitulum consists of thirteen valves, the borders of which 

 are not everywhere distinguishable, the chitinous membrane covering the valves being 

 rather thick. 



The scutum is not very large, of an irregular quadrangular shape. The apex, where 

 the umbo is situated, is produced, the tergal margin hollowed out, the occludent margin 

 convex, the basal margin oblique, with an excavation for the reception of the rostral latus. 



The tergum is large, surpassing the scutum considerably in area. Its occludent 



