endopodite is, like the other ramus, fringed with long feathered setae and bears at the posterior 

 third a well-developed appendix interna or stylamblys; this appendix measures one-third the 

 length of the endopodite, is four-times as long as wide in the middle and narrows slightly 

 both to the proximal and to the distal extremity which is rounded, devoid of cincinnuli, 

 but provided with 2 or 3 feathered hairs, vvhile 3 or 4 similar long hairs are implanted on 

 the lateral margins. The exopodite of the 3 rd pleopod of the female has the same size and 

 form as that of the 2 nd ; the endopodite, however, is a little shorter, only half as long as the 

 outer branch and extends only along the two proximal fifths of the latter; the stylamblys 

 measures also one-third the length of the endopodite, but is hardly more than three times 

 as long as wide. In the 4 th pleopod of the female the inner branch is still more reduced in 

 size, measuring only tvvo-fifths the length of the outer branch and the stylamblys measures 

 hardly one-third of the endopodite. In the 5 th pleopod (Fig. 67;/, 670) of the female, finally, 

 the outer branch measures only two-thirds the length of the outer branch of the 2 nd pleopod, 

 but endopodite and stylamblys are here quite rudimentary, the length of the inner branch 

 being only one-fourth that of the outer branch, while the stylamblys measures hardly one-fifth 

 the length of the endopodite and appears devoid of setae. 



In the male from Stat. 50 the exopodite of the 2 nd pleopod (Fig. 67 h, 67/) shows the 

 same form and size as in the female, 4-times as long as wide, but it is nearly as long as the 

 protopod; the inner branch measures two-thirds the length of the outer, reaches a little beyond 

 the middle of it and is provided with a stylamblys at the proximal third. This stylamblys has a 

 quite other form as in the female, it measures a little more than one-third the 

 length of the endopodite, is styliform, six times as long as thick, with a cluster of 

 well-developed cincinnuli on the tip, while the lateral margins are fringed each with 3 

 or 4 long feathered setae. Besides this true stylamblys the inner margin of the endopodite shows 

 nearly in the middle a truncated prominence, that, perhaps, represents the appendix 

 masculina, because in the following pleopods this prominence does n o t occur. In the 3 rd pleopod 

 of the male the exopodite has the same form and nearly the same size, but the inner branch 

 measures little more than half the length of the outer, it is 5-times as long as wide, fringed 

 with long feathered setae, while the stylamblys, which for the rest resembles that of the 2 nd , 

 though being a little thicker, measures almost half the length of the endopodite. In the 4 th 

 pleopod of the male the exopodite shows also the same form and size as in the 2 nd , but it is 

 distinctly longer than the protopod; the endopodite is not yet half as long as the outer branch, 

 4-times as long as wide proximally, and the well-developed stylamblys with cincinnuli measures 

 two-fifths the length of the inner ramus. In the 5 th pleopod, finally, of the male (Fig. 67/, 67^) 

 both endopodite and stylamblys are still more reduced, the former distinctly shorter than half 

 the exopodite, though reaching only along the proximal third of the latter, while the stylamblys 

 bears still 4 or 5 cincinnuli. 



The ova-bearing female from Stat. 7 is 1 2 mm. long, the specimen from Stat. 142, 

 however, measures only 6 mm. 



Eggs 0,6 mm. long, 0,4 mm. broad. 



