LYSIANASSIDAE 



69 



Orchomenella cavimanus (Stebb.) (Fig. 27 g). 



Stebbing, 1888, p. 679, pi. xxii. 

 Schellenberg, 1926, p. 285, fig. 25. 



Occurrence: 1. St. 51. Falkland Islands. 4 6*6* 8 mm., 12 $$ (incl. specimens with ova and 

 embryos) 8-10 mm., 5 juv. 6-7 mm. 

 2. St. 152. South Georgia. 1 ? 10 mm. 



Remarks. Eyes pale brown. Epistome and upper lip as in Stebbing's figure. Pleon 

 segment 4 as in Schellenberg's figure. The 2nd antennae are distinctly longer than 

 the 1st in <?. 



Distribution. Kerguelen; ' Gauss' winter station. 



Orchomenella abyssorum (Stebb.) (Figs. 27 b, 28). 



Stebbing, 1888, p. 676, pi. xxi. 



Schellenberg, 1926, p. 291, fig. 27 (chilensis form abyssorum). 



Occurrence: St. 208. South Shetlands. 1 $ 6-5 mm., 1 $ 10 mm. 



Remarks. The stout plates of the 2nd maxilla and the stout 

 outer plate of the 1 st maxilla are not at all like those of the typical 

 Orchomenella species. The large yellowish brown pear-shaped 

 eyes and other features indicate that these specimens are 

 correctly identified with the Gauss specimens, and also I think 

 with the Challenger type. The characters separating this species 

 from rossi are so great that I cannot agree to regarding it as a 

 form of chilensis. 



Distribution. South Atlantic (off Buenos Aires), 3578 m. ; 

 ' Gauss' winter station, 385 m. 



a. 



Fig. 28. Orchomenella abys- 

 sorum (Stebb.). a. Profile of 

 epistome and upper lip. b. Palp 

 of maxilla I. 



Orchomenella rossi (Wlkr.) (Fig. 27 e). 



Schellenberg, 1926, p. 288, fig. 26. 

 Barnard, 1930, p. 327. 



Occurrence: 1. St. MS 68. South Georgia. 1 $, 1 $ 19 mm. 



2. St. 39. South Georgia. 2 ovig. $$ 25 and 30 mm. 



3. St. 42. South Georgia. Many $$ 17-29 mm., the larger ones ovigerous. 



4. St. 45. South Georgia. 6 S<3 17-21 mm., 1 $ 19 mm., 4 ovig. $? 26-28 mm. 



5. St. 123. South Georgia. Many <$<$ and $$ and immat. 15-28 mm., the largest $? 

 ovigerous. 



6. St. 142. South Georgia. 14 66 14-21 mm., 7 $? 17-25 mm., 2 ovig. $$ 23 and 

 25 mm., 19 juv. 5-12 mm. 



7. St. 149. South Georgia. 12 66 18-21 mm., 2 $$ 20 and 22 mm., 4 ovig. ?? 

 25-28 mm. 



8. St. 154. South Georgia. 4 33 18-20 mm. 



9. St. 173. South Shetlands. 1 ovig. $ 16 mm. 



10. St. 178. Palmer Archipelago. 1 6 15 mm., 2 ?? 14 mm., 2 ovig. $$20 and 25 mm. 



11. St. 181. Palmer Archipelago. Many ovig. $$ 21-38 mm., comparatively few c?c? 

 17-30 mm., a few juv. n-15 mm. 



