10 G. O. Sårs. 



narrow cylindric form to that in the male, but comprises 

 only 25 segments, the 14 anterior of which are pedigerous. 

 Of non-pedigerous or caudal segments there are accordingly 

 only 11, instead of 14, as in the male. The last segment 

 does not exhibit any difference from that in the male. The 

 caudal filaments, on the other hand, are comparatively more 

 elongated, somewhat exceeding half the length of the body. 

 Their structure, however, is exactly as in the male. 



The female may, moreover, easily be recognised by the 

 transformation of the 2 outer appendages of the 11th pair 

 of legs to egg-capsules. When these capsules, as is gener- 

 ally the case in adult specimens, contain eggs, they are 

 also easily traced in the dorsal view of the animal, shining 

 through the lateral lobes of the carapace on each side of 

 the posterior sinus (see fig. 2). 



The colour in both sexes is a more or less distinct 

 leathery brown, somewhat lighter in the male than in the 

 female, and sometimes changing into red ochre. This colour, 

 however, in preserved specimens, very soon disappears, and 

 is replaced by a uniform, yellowish green hue. As the 

 carapace is semipellucid, its lateral parts appear lighter than 

 the frontal and median parts where the dark body shines 

 through it; its edges, as also the spinules fringing the 

 posterior sinus and those encircling the exposed segments, 

 are tinged with chestnut. The eyes are dark brown, and 

 are surrounded by a rather broad, bright red margin. The 

 outer appendages (exopodite and epipodite) of the legs, 

 especially of those exposed behind the carapace, exhibit a 

 beautiful coral-red hue. Through the exposed part of the 

 body the capacious intestinal tube with its dark contents 

 may be faintly traced. 



