PHOXOCEPHALIDAE 101 



Gnathopod i, 5th joint rather larger proportionately than mpennatus. Peraeopod 5, 

 2nd joint considerably more broadly expanded than in either pennatus or videns, hind 

 margin with sharp serrations, anterior margin of lobe facing the 3rd and 4th joints 

 slightly concave, the lower anterior angle rounded-quadrate, 4th joint lobed on hind 

 apex as in videns. 



Remarks. This species resembles the genotype pennatus, Shoem., very closely, but is 

 distinguished by the 5th peraeopod and 4th side-plate. From the other Antarctic species 

 the acutely produced postero-inferior angle of pleon segment 3 easily distinguishes the 

 new form. 



Genus Parharpinia, Stebb. 

 Stebbing, 1906, p. 147. 

 Tattersall, 1922, p. 4. 



Tattersall has doubted the value of the characters used to separate Parharpinia from 

 Pontharpinia. The expansion of the 4th and 5th joints of peraeopods 3 and 4 certainly 

 seems to show gradations. The following species are typical Parharpinia according to 

 Stebbing's diagnosis. 



Parharpinia obliqua, n.sp. (Fig. 51). 



Occurrence: 1. St. 136. South Georgia. 1 <$ 11 mm. 

 2. St. 175. South Shetlands. 1 ? 15 mm. 



Description. Body dorsally rounded, glabrous. Hood flattened, apex in dorsal view 

 rounded (cf. Sars, pi. li, Paraphoxns ocidatns). Eyes black, in S large, obliquely ovate, 

 nearly meeting dorsally, in $ small, oval. Side-plates 1-4 fringed with setae on lower 

 margin; 1 scarcely widened below, 4 as deep as long, excavation shallow. Postero- 

 inferior angle of pleon segment 3 rounded, with an oblique row of long spine-setae; 

 segment 4 with evenly rounded dorsal profile. Telson with the lobes apically rounded, 

 a spine and a setule in a little notch towards the outer margin. 



Antenna 1, 2nd joint with long setae on lower margin in $, flagellum 12-jointed in S, 

 1 1 -jointed in ?, accessory flagellum 8-jointed in 6*, 7 in ?. Antenna 2, 4th joint expanded 

 below, but width not more than two-thirds length, lower margin with very long spine- 

 setae, upper margin in ? with some long setae on inner side, on outer side a series of 

 about 14 very strong outstanding spines, in $ with thick fringe of setae, 5th joint in $ 

 also with very long setae on lower margin and strong outstanding spines on upper outer 

 margin, the latter consisting of 4 in the middle of the joint, 2 towards the apex, in $ 

 upper margin with 8-9 fascicles of setae and 8-9 calceoli, flagellum 12-jointed in ?, 

 multiarticulate and calceoliferous in S- Third palpal joint of mandible equal to 1st and 

 2nd together. Maxilliped, outer plate easily extending beyond middle of 2nd joint of 

 palp, fringed on inner margin with about 12 graduated serrate spines, with 2-3 plumose 

 spine-setae distally. 



Gnathopods 1 and 2, similar to Tattersall's figure of villosa (1922, pi. i, figs. 9, 10) 

 but 5th joint in gnathopod 1 measured along its upper margin nearly as long as 6th 

 joint. 



