50 



DISCOVERY REPORTS 



Hypsilophic form 



Occurrence: i. St. 45. South Georgia. 1 $ 10 mm. 



2. St. 123. South Georgia. 1 <J 13 mm. 



3. St. 140. South Georgia. 1 <$ 9 mm., 4 ovig. $$ 9-14 mm. 



4. St. 144. South Georgia. 2 SS n-ia mm., 3 $$ 9-10 mm., 2 ovig. <j>$ 10 mm., 

 1 juv. 6 mm. 



Remarks. The two forms here placed under kergueleni should in my opinion be 

 regarded as specifically distinct. The raised keel on pleon segment 4 is correlated with a 

 more prominently projecting upper lip. 



b. 



Fig. 13. Tryphosa kergueleni (Miers). Dorsal profile of pleon segment 4 and 

 profile of epistome and upper lip of: a. typical form; b. hypsilophic form. 



Schellenberg figures the two forms of carina, but says nothing about the upper lip. 

 Both forms were found together at the ' Gauss ' winter station. In the Discovery collec- 

 tion the hypsilophic form was found in a different locality and in much deeper water. 



The two forms should be distinguished in all future records, and earlier records 

 should be re-examined. 



Distribution (kergueleni sensu lato). Kerguelen; ' Gauss' winter station; Ross Sea; 

 South Georgia; New Zealand. 



Tryphosa major, n.sp. (Fig. 14). 



Occurrence: 1. St. 159. South Georgia. 4 $$ 16-21 mm., 3 ovig. $$ 18-22 mm. 



2. St. 170. South Shetlands. 2 S3 14 mm., 1 ? 14 mm., 1 ovig. $ about 20 mm. 

 (mutilated). Types. 



3. St. 175. South Shetlands. 

 3 $$ 12, 13, 16 mm. 



Description. Closely resembling the 

 typical form of kergueleni in pleon seg- 

 ments 3 and 4, but apparently a larger 

 species. In other respects generally re- 

 sembling kergueleni but inner lobe of 

 maxilla 1 with six plumose spine setae, 

 and epistome produced in a convex, but 



somewhat flattened lamina from between -"""^ a. 6. 



the bases of the 2nd antennae to the pig. 14. Tryphosa major, n.sp. a. Pleon segments 3 

 upper lip. and 4. b. Profile of epistome and upper lip. 



