54 DISCOVERY REPORTS 



Genus Tryphosites, Sars. 



Stebbing, 1906, p. 77; 1914, p. 355. 



Sexton, 191 1 (Ann. Mag. Nat. Hist., ser. 8, vol. vn), p. 510. 



The genus is characterized by the prominent spiniform process of the epistome. It 

 includes the northern longipes (Bate and Westw.) with a strong upturned point on the 

 postero-inferior angle of pleon segment 3, and alleni, Sext., with two points, stebbingi 

 (Wlkr.) from Cape Adare and Coats Land, 1 with a short point, and chevreuxi Stebb. 

 with the lower hind margin strongly serrate. 



Tryphosites chevreuxi, Stebb. (Fig. 19). 

 Stebbing, 1914, p. 355, pi. iii. 

 Occurrence: 1. St. 51. Falkland Islands. 1 <J 7-5 mm., 2 $? 8-9 mm., 1 juv. 6 mm., from kelp 

 root. 



2. St. 222. Cape Horn. 1 juv. 7 mm. 



3. St. WS 71. Falkland Islands. 3 $$ 

 (1 ovig.) 12-13 mm - 



4. St. WS 92. Between Falkland Islands 

 and South America. 1 $ 8 mm., 

 2 immat. 7 mm. 



Remarks. Antenna 1 in ?, flagellum 14- 

 jointed, accessory flagellum 5 -jointed. Antenna g N C. 



2, flagellum 14-jointed. Side-plate I slightly Fig. 19. Tryphosites chevreuxi, Stebb. a. An- 



narrowed, or at least not widened, below. Telson terior margin of head with epistome and upper 



more tapering than in Stebbing's figure, with U P' *• Variation of epistome. r. Pleon segments 



, • , 1 l • 1 3 and 4. 



narrower subacute apices, each lobe with two 



apical and two lateral spines. The epistomal process is more upturned and falciform than 

 in longipes. A single accessory branchia on both segments 5 and 6. 

 Distribution. Falkland Islands, 8 fathoms. 



Genus Tmetonyx, Stebb. 

 Stebbing, 1906, pp. 73, 720. 

 Schellenberg, 1926, p. 278; 1931 , p. 40. 



T. stebbingi (Wlkr.) must be transferred to the genus Tryphosites as Chilton (1912) has 

 shown, owing to its having the epistome produced in a long acute process. The only 

 other austral representatives are miersi from Australia, the Kerguelen species cicadoides 

 Stebb., and the Antarctic ('Gauss' winter station) species cicodopsis Schell. 



The following species is very closely allied to the last-mentioned. 



Tmetonyx longitelson, n.sp. (Fig. 20). 



Occurrence: St. 159. South Georgia. 2 ovig. $? 15 and 18 mm., 1 $ with embryos 15 mm. 



Description. Differing from cicodopsis as follows : palp of maxilla 1 neither emargin- 

 ate on outer margin nor serrate on inner margin ; postero-inferior angle of pleon segment 3 



1 In some MS notes on the 'Quest' Expedition, which the late Dr Chilton kindly forwarded to me, this 

 species is recorded from St. 102 off Prince Olaf Station, South Georgia. I have not seen the specimen. 



