REPORT ON THE CIRRIPEDTA. 97 



The capitulum has fourteen valves, and is rather robusl ; the scutum, tergum, and 

 carina axe large; the valves of the lower whorl are relatively small The valves touch 

 each other, and are covered by a distinct membrane with velvet-like hairs. 



The scutum is exactly twice as long as broad, and distinctly convex. The umbo is at 

 the apex, which slightly projects over the occludent margin of the tergum. The occludenl 

 margin is slightly convex, the tergal margin slightly hollowed out near the apex, t In- 

 lateral margin is again convex, the basal margin straight. 



The tergum is very large, rather narrow,- with the carina] and scutal margins convex, 

 the occludent margin hollowed out, and the umbo at the apex, which terminates bluntly. 



The carina is simply bowed, with a fiat roof widening much from the apex to the base. 

 The umbo is at the apex, which penetrates rather far between the two terga. The borders 

 of the roof are furnished with a not very prominent ridge; the sides are at less than 

 right angles with the roof of the carina. They increase in breadth from the apex to 

 the base. 



The xipper latus is triangular, the basal margin is feebly convex, the scutal an ] 

 tergal margins are nearly ecpial ; the umbo is at the apex. 



The rostrum is very small and totally covered by membrane ; it has a triangular 

 shape, its apex being separated from the two scuta by the umbones of the rostral latera, 

 which touch each other in front of the rostrum. 



The rostral latus is broad but very low ; the basal margin is almost parallel with 

 the scutal margin. 



The infra-median latus is triangular, with the umbo at the apex. 



The carinal latus is of a very n-regular shape, robust. Its carina! margin is divided 

 into two portions, the superior one being hollowed out ; the upper margin is also hollowed 

 out for the reception of the convex margin of the upper latus. The umbo is at the 

 hindermost point of the carinal margin, and projects a great deal outwards. The inferior 

 portion of the* carinal margin of the valve is convex, and meets the same portion of the 

 marsin of the valve of the other side beneath the middle of the carina. From the umbo 

 arises a ledge, which divides the valve into two parts, — the true lateral and a carinal 

 part. Between the latter and the carina a distinct cavity— a kind of hag — is formed. 



Length of the capitulum, 33 mm. 



The peduncle is robust, nearly cylindrical, and has a length of 12 mm. The scales 

 are for the greater part covered by membrane, the edges only being calcareous. The 

 membrane is villous, as on the capitulum. The scales are numerous, a dozen being 

 placed in each longitudinal row, of which there are about ten. Their number cannot 

 be distinctly made out, the longitudinal rows running rather oblicpuely. 



In general this description holds good also for the three small specimens dredged at 

 Station 3. They differ slightly from the typical specimen described above in the form of 

 the carinal latus, and much more with regard to the number of scales of the peduncle. The 



(ZOOL. CHALL. EXP. PART XXV. — 1863.) Ijb 13 



