52 



DISCOVERY REPORTS 



segment 3 with the lower margin and the slightly convex hind margin meeting in an 

 angle less than 90 , the corner rounded (cf . Schellen- 

 berg's fig. 16 b for murrayi); segment 4 with a 

 triangular carina, the posterior margin falling away 

 steeply but obliquely; side-plate 1 produced for- 

 wards and narrowed below, subtriangular or 

 slipper-shaped (cf . adarei) ; epistome produced in 

 a triangular projection above the upper lip ; gnath- 

 opod 1 rather slender, as in adarei; uropod 3 with 

 inner ramus as long as 1st joint of outer ramus, 

 both rami spinulose, without plumose setae ; telson 

 ovate, about half as long again as wide, each lobe 

 with two apical and two lateral spines. 



Remarks. This appears to be a close ally of 

 trigojtica and adarei, but pleon segment 3 and the 

 epistome are distinctive ; the carina on segment 4 



Fig. 16. Tryphosa triangularis, n.sp. a. Tel- 

 son. b. Side-plate 1. c. Anterior margin of 



is not symmetrical as in trigonica. Possibly some of head with peduncle of antenna 1, and 

 the specimens attributed to murrayi by Schellenberg epistome and upper lip. d. Pleon segments 

 (1926, fig. 16 b) should belong here. 3 an 4 ' 



The specific name refers to the likeness to trigonica and to the shape of the epistome. 



Tryphosa analogica, n.sp. (Fig. 17). 



Cf. T. serrata, Schellenberg, 1931, p. 34, figs. 15, 16. 



Occurrence: 1. St. 144. South Georgia. 2 ovig. $9 12 and 15 mm., 1 juv. 6 mm. 



2. St. 156. South Georgia. 3 $? 10-13 mm - 



3. St. 159. South Georgia. 1 ovig. $ 12 mm. 



4. St. WS 25. South Georgia. 1 c? 14 mm., 

 1 $ 14mm., 2 ovig. $°. 16-17 mm. Types. 



Description. Antero-lateral angle of head 

 pointed, but not very acute, reaching three-quarters 

 the length of 1st joint of antenna 1 . Eyes invisible. 

 Pleon segment 3 with postero-inferior corner pro- 

 duced in a rounded, serrate lobe; segment 4 with 

 a strong subtriangular carina, rounded at apex, 

 posterior margin vertical. Side-plate 1 slightly but 

 distinctly narrowed distally. Epistome produced in 

 a broadly rounded lobe above the upper lip. Gnatho- Fig. 17. Tryphosa analogica, n.sp. a. Pleon 

 pod 1 slender. Peraeopods 3-5 with 2nd joint feebly segments 3 and 4, with serration further 



.11 i-i rn 1 • 1 enlarged, b. Telson. c. Anterior margin of 



notched on hind margin, ielson twice as long as . , . , . , ,. , , 



° head with epistome and upper lip (the 



wide, each lobe with three lateral and two apical dotted line indicates a slight variation found 



spines. in some specimens). 



