REPORT ON THE CTRRIPEDI \. 105 



leaves the apices of the different valves uncovered, and is sparsely hairy. The scutum is 

 rather more hairy towards the occludent margin. The lines of growth arc not very distinct. 



Thescutum has the umbo at the apex, ami has the shape of a trapezium, the occludent 

 margin being the longer of the two nearly parallel sides. The apex of the valve is broken, 

 but would have projected freely when present. The valve is. especially on the under side, 

 distinctly convex. The lines of growth are not very distinct, and run partly parallel to 

 the basal margin, partly to the lateral margin. The occludent margin is straight, 

 the tergal margin hollowed out, the lateral margiii is convex, the basal margin straight. 



The tergum is large, having a greater area than the scutum; oval, with the upper angle 

 broken off and therefore truncated, and the under extremity pointed and extending far down 

 between the upper latus and the carina. The occludent margin is straight, the apex broken 

 off and thus truncated; the earinal margin is distinctly arched, the scutal margin is arched 

 as far as it runs at the side of the scutum, and slightly hollowed out near the upper latus. 



The carina is simply but slightly bowed ; from the apex to the basis it widens 

 considerably. It has a distinct roof, which is not quite flat but slightly convex ; the 

 sides of the carina are at angles greater than 90° with the roof. The apex projects freely, 

 but being broken it is impossible to judge of the extent of this free projection. 



The upper latus is quadrangular, owing to the shortness of the earinal margin almost 

 triangular, with the umbo at the apex, slightly but distinctly beaked, and projecting 

 over the surface. The scutal margin is almost straight, only slightly hollowed out ; 

 the tergal margin is distinctly arched, the basal margin slightly convex. 



The rostrum is almost totally covered by the chitinous membrane ; it is very small 

 and carinate ; the lateral parts are covered by the rostral latera. 



The rostral latus is broad but low, trapeziform, with the umbo at the rostral 

 extremity. The basal margin is shorter than the scutal margin. 



The infra-median latus is not very small, and of a triangular shape. 



The earinal latus is medium-sized, and has the same shape almost as in Scalpellum 

 regium, Scalpellum darwinii, and Scalpellum velutinum. The umbo is seated at the apex, 

 which is beaked and slightly projecting outwards. A ledge arises from the apex, and 

 separates a small oval depression from the upper latus. The earinal margins of the two 

 earinal latera are convex, and touch each other at the base and below the middle of the 

 carina. 



Length of the capitulum about 33 mm., of the peduncle 1G mm. 



The peduncle is stout, growing only slightly thinner towards the under extremity. 

 The scales are placed in about nine longitudinal rows, and are totally covered by membrane. 

 Transversely each row consists of eight scales. 



No complemental males observed. 



This species was taken at Station 195, October 3, 1874 ; lat. 4° 21' S., long. 129° 7' E. : 

 depth, 1425 fathoms; bottom temperature, 3° - C. ; bottom, grey ooze. 



(ZOOL. CHALL. EXP. PART XXV. 1883.) Bb 1 t 



