OEDICEROTIDAE 135 



Gnathopod 2, 5th joint broader, more convex on lower margin than in Sars' figure 

 of abyssi. Peraeopods 1 and 2 as in abyssi. Peraeopods 3-5 in <$ more slender than in 

 abyssi. 



Telson and uropods as in abyssi. 



The $ from St. 208 has the tooth on pleon segment 4 single. 



Remarks . The depth of the head in $ , the double tooth on pleon segment 4 (normally) , 

 and the spiniform tooth on segment 5 are the distinguishing features of this Antarctic 

 counterpart of the northern abyssi. The accessory flagellum in 6*, if natural, is a further 

 mark of distinction. 



Family OEDICEROTIDAE 



Stebbing, 1906, pp. 235, 726. 



Barnard, 1925, p. 348. 



Schellenberg, 1925, p. 145; 193 1, p. 139. 



As the result of the Discovery Investigations this family, like several others, is shown 

 to be well represented in the southern seas. 



Genus Paraperioculodes, Brnrd. 

 Barnard, 1931, p. 427. 



Rostrum short. Eyes completely fused, forming a circular (unpigmented) patch on 

 top of head, not on rostral process, lenses well developed, numerous. First side-plate 

 produced forwards. Telson short, broader than long. 



Antenna 1 shorter than antenna 2. Mandible, molar with triturating surface, palp 

 linear, 2nd joint not curved. Lower lip with inner lobes separate. Maxilla 1 with 1-2 

 setae on inner lobe. 



Gnathopods 1 and 2, 5th joint with broad lobe, 6th joint ovate. Peraeopods 1 and 2 

 without expanded joints. 



Uropod 3 not longer than uropods 1 and 2. 



Remarks. Resembling Perioculodes as regards the fused eyes and the short rostrum, 

 but differing in the well-developed molar of the mandible, and the gnathopods. These 

 same two characters also separate it from Perioculopsis, Schell. 



Paraperioculodes brevimanus, Brnrd. (Fig. 75). 

 Barnard, 193 1, p. 427. 



Occurrence: 1. St. 144. South Georgia. 1 ovig. $ 5-5 mm. 



2. St. 154. South Georgia. 7 ovig. $£ 5-6 mm., 6 immat. 4-5 mm. 



3. St. WS 62. South Georgia. 1 ovig. $ 4 mm. 



4. St. MS 68. South Georgia (220-247 m -)- J c? 6 mm., 3 ovig. $$ 5-5 mm., 

 8 juv. and immat. 2-5-5 mm - Types. 



Description. Integument smooth. Head, peraeon and pleon dorsally rounded. 

 Rostrum short, only slightly deflexed. Eyes completely fused, forming a circular patch 



