Genus THYSANOESSA, Brandt 



12. Tliysanoëssa gregaria, G. O. Sars 



Thysanoëssa gregaria, G. O. Sars, op. cit. p. 120, Pl. xxi, 

 figs. 8-1 7 ; Pl. xxii. 



Locality. — Stat. 1760, 1 spécimen. 



i3. Thysanoëssa parva, n. sp. 



(Fig. 22-24). 



Description. — This species is closely allied to T. gregaria, 

 with which it agrées in possessing a denticle on the lower 

 margin of the carapace, in the relative length of sixth abdominal 

 segment, etc. But it is much smaller, the body is comparatively 

 more slender, the upper section of the eyes is well defined but 



Fjg. 22. Left eye and anten- 

 nula of a female of Thy- 

 sanoëssa parva, latéral 

 view. 



Fig. 23. — Left elongate leg 

 (of first pair) of the same 

 spécimen. 



Fig. 24. — Distal part of the 

 leg shown in fig 2 3. 



a little smaller as compared with the lower portion, the anten- 

 nular peduncle, when compared with the size of the eyes, is 

 comparatively longer and more slender, furthermore the elon- 

 gate pair of legs is more slender and shows besides well-marked 

 différences in their setœ. In T. gregaria the setœ on the lower 

 margin of sixth joint are rather robust, long, most of them as 

 long as or longer than the terminal stiff setae of the seventh 



(30) 



