GAMMARIDAE 



215 



of 3rd joint, hind margin convex, serrulate, 4th strongly expanded, almost as wide as 

 2nd, 5th and 6th narrow, finger with accessory denticle on outside of unguis. Peraeopods 

 4 and 5, 2nd joints resembling that of peraeopod 3, 4th joint not expanded, twice as long 

 as wide. 



Uropod 3, rami not extending beyond apices of rami of uropod 1, apices truncate. 



Fig. 132. Maera ascensionis, n.sp. a. Gnathopod 2$. b. Gnathopod 2 of young <J. 

 c. Peraeopod 3, with dactyl further enlarged. 



Remarks. The chief characteristic of this species is the expansion of the 4th joint of 

 peraeopod 3, which isolates it from all the other species. The palm of gnathopod 2 in the 

 S might be regarded as a variant of that of inaequipes, but the hand is considerably longer 

 in proportion to its breadth. 



Genus Paraceradocus, Stebb. 

 Stebbing, 1906, p. 429; 1910, p. 597. 

 To complete the generic diagnosis it may be stated that the inner lobes of the lower 

 lip are present (see also Stebbing, 19 10, pi. li). 



Paraceradocus miersii (Pfr.) (Fig. 133). 



Pfeffer, 1888, p. 121, pi. iii, figs. 3 a-e. 

 Chevreux, 1906, p. 93; 1913, p. 180. 

 Chilton, 1912, p. 500; 1913, p. 59; 1925, p. 179. 

 Occurrence: 1. St. 45. South Georgia. 2 $$ 31 and 42 mm. 



2. St. 123. South Georgia. 1 juv. 16 mm. 



3. St. 167. South Orkneys. 8 $S 55-66 mm., 4 ?$ 46-65 mm., 1 ? with embryos 

 60 mm., 4 ovig. $? 57-70 mm., 1 juv. <$ 25 mm., 3 juv. $$ 23-26 mm., 1 juv. 

 13 mm. 



Remarks. This fine animal is unmistakable. Nevertheless one or two points in which 

 the present specimens do not quite conform with Pfeffer 's description may be noted. 



