PHOXOCEPHALIDAE 



103 



Parharpinia sinuata, n.sp. (Fig. 52). 



Occurrence: 1. St. 159. South Georgia. 1 $ 14 mm. Type. 



2. St. WS 88. Cape Horn. 1 $ 11 mm., 1 juv. 8 mm. 



Description ?. Distinguished from obliqua by the following characters. 



Hood more sharply pointed. Eyes considerably larger. Pleon segment 3 with postero- 

 inferior angle rounded, with a slight emargination above, set with a graduated series of 

 setae; no oblique row of setae on the lateral surface. 



Gnathopods 1 and 2, 5th joint longer proportionately to 6th; in gnathopod 1 it is 

 equal to 6th, in gnathopod 2 almost equal to 6th (measured along upper margin). 



Peraeopod 3, 2nd joint not markedly pyriform, the hind margin evenly convex. 

 Peraeopod 4, 2nd joint not angularly but evenly convex on anterior margin, more 



Fig- 5 2 - Parharpinia sinuata, n.sp. a. Dorsal view of head. b. Pleon segments 3 and 4 (of type), c. Postero- 

 inferior corner of pleon segment 3 (St. WS 88). d. 2nd joint of peraeopod 3. e. 2nd joint of peraeopod 4. 

 /. Peraeopod 5. (Setae in d, e,/omitted.) 



strongly spinose, but with a feeble fringe of plumose setae at apex, or none at all, hind 

 margin straight, not concave, with a larger rounded lobe at hind apex. Peraeopod 5, 

 3rd and 4th joints with anterior margin straight, not lobed or markedly convex, 4th not 

 produced on hind apex. 



Remarks. Like the previous species this differs from villosa; in fact considerably 

 more so, because of the greater length of the 5th joint in both gnathopods. In this 

 latter respect it somewhat resembles Protophoxus australis, Brnrd., but there the 5th 

 joint is much more slender. 



The specific name refers to the slight sinuosity of the hind margin of pleon segment 3 . 

 The position of this slight sinus with its group of setae varies ; in the type it is low down 

 and the angle of the segment is consequently narrowly rounded; in the other two 

 specimens it is higher up and the angle is broadly rounded. The other characters are 

 identical, so that one must regard this feature as variable. 



