CAPRELLIDAE 305 



Antenna 1 elongate, reaching back to about middle of segment 4, relatively longer in 

 c? than in ? owing to greater length of segments 3 and 4 in <$, flagellum 13-jointed in <£, 

 in ? 5 + ? Antenna 2, flagellum 6 (-7)-jointed in J, 5-jointed in ?, without long setae. 



Mouth-parts as figured by Stebbing for Dodecas elongata (1888, pi. cxl). 



Gnathopod 2 inserted at anterior end of segment, 2nd joint as long as hand (i.e. fused 

 5th and 6th joints), 6th ovate, palm with basal spinigerous tooth, followed by a pair of 

 small spinigerous tubercles, then obscurely serrulate and setulose, ending in a low 

 truncate tooth near hinge; similar in both sexes but rather smaller in ?. 



Peraeopod 1 a little longer than 2nd joint of gnathopod 2, at least two-thirds length 

 of segment 3. Peraeopod 3 short, 4-jointed, the 4th joint forming a curved claw. 

 Peraeopods 4 and 5 elongate, very slender, 2nd and 4th joints somewhat bulbous 

 distally, 5th slender with two spinules on inner margin, 6th slender, cylindrical, very 

 slightly curved, inner margin with two to three spinules proximally, 7th long, slender 

 and rather strongly curved. 



Branchia on segment 3 about two-fifths length of segment ; that on segment 4 in S 

 as long as segments 3 and 4 together ; in immature <$ shorter, and in $ equal in length 

 to that on segment 3. 



Pleon with two pairs of slender, 2-jointed appendages. 



Brood lamellae on segment 3 with posterior margin setose, anterior margin of those 

 on segment 4 smooth. 



Genus Aeginoides, Schell. 

 Schellenberg, 1926 a, p. 465. 

 Barnard, 1930, p. 441. 



Aeginoides gaussi, Schell. (Fig. 169 d). 



Schellenberg, 1926 a, p. 465, fig. 1 (immat.). 

 Barnard, 1930, p. 442, fig. 63 (adult +'). 



Occurrence: 1. St. 30. South Georgia. 2 ovig. ?? 23, 24 mm. 



2. St. 39. South Georgia. 1 immat. $ 13 mm. 



3. St. 42. South Georgia. 1 (J 18 mm., 1 immat. $ 15 mm., 1 ovig. ? 19 mm. 



4. St. 123. South Georgia. 3 SS l 7> 24, 28 mm., 2 ?$ 20, 21 mm. 



5. St. 152. South Georgia. 1 ovig. '+' 21 mm. 



6. St. 175. South Shetlands. 1 <^ 23 mm., 1 ovig. $ 25 mm. 



7. St. 195. South Shetlands. 3 $<$ 23, 28, 33 mm., 2 ovig. $$ 26, 28 mm., 10 juv. 

 6-12 mm. 



Description. Forehead rounded. Eyes distinct, round. Peraeon segment 2 sub- 

 equal to head plus segment 1. Segments 3, 4 and 5 successively longer; segment 6 

 equal to segment 4. 



In young specimens up to 12 mm. the body is smooth. The adult 6* has a small lateral 

 tubercle over the base of gnathopod 2 and of the branchiae on segments 3 and 4, a 

 medio-dorsal tubercle on segment 2, and a pair of dorso-lateral tubercles vertically 

 above the lateral ones on segments 3 and 4; the medio-dorsal tubercle on segment 2 

 absent in ? and sometimes in ^ ; the dorso-lateral tubercles on segments 3 and 4 also are 



D V 39 



