266 Annals of the South African Museum. 



slight backward crook, so that two small intervals are left when 

 finger and thumb meet. The palm is stout, but considerably longer 

 than broad, with a ridge which is continued along the thumb. The 

 fifth joint is short, triangular ; the fourth twice as long, with one 

 margin straight, the other strongly curved. The whole limb is only 

 sparingly setiferous, in strong contrast to the following pair and to 

 the two terminal joints in the third, fourth and fifth pairs. In the 

 second peraeopods the fingers of the chela are rather longer than 

 the palm, Avhich has a lateral ridge, such as appears also on the fifth 

 joint. 



The first pair of pleopods are uniramous, very slender and moderately 

 setiferous. The four following pairs are richly supplied with plumose 

 setae, the endopod about three times as long as broad, with a narrow 

 retinaculum about one-fourth of the endopod's length, carrying half 

 a dozen hooks or buttons on the apex for linking on to its companion 

 pleopod ; the exopod is shorter but much broader than the endopod. 

 The peduncle of the uropods is very small, the endopod transversely 

 triangular, crossed by an indistinct spinuliferous ridge margined to 

 the rear with plumose setae, above which are some shorter spindle- 

 shaped spines or setae ; the rather larger exopod has the narrower 

 end pointed backward instead of outward and has no suture. 



The carapace of this soft membrauaceous specimen was difficult to 

 manipulate. From the short blunt setuliferous rostrum to the 

 middle lobe of the hind margin I make the length 10 mm., and 

 thence to the end of the telson the length of the body was 23 mm. 

 The relative size of the large cheliped may be judged from the length 

 of 9 mm. attained by the hand and fingers, apart from its other 

 joints. The sides of the pleon are setose as far back as the fifth 

 segment, which is shorter than its neighbours. The sixth segment 

 and the tail-fan are in the preserved specimen of firmer consistency 

 than the rest of the body, the sixth segment having a median carina, 

 which, perhaps, commences on the preceding segment and is continued 

 on the telson, but not to the broad setose hind border. The telson 

 slightly contracts near the middle, the sides converging with a gentle 

 concavity to the convex or very obtuse-angled posterior margin. 



Locality. Cape Morgan, N.N.W. 7 miles ; depth 52 fathoms. 

 A 957. 



TRIBE SCYLLARIDBA. 



(On this tribe see an important note by Caiman, Ann. Nat. Hist., 

 ser. 8, vol. 3, p. 442, 1909.) 



