403 



length of the anterior division, and having the hind edges of the segments clothed 

 with delicate spinules. Caudal rami nearly twice as long as they are broad, and 

 slightly divergent; apical setse exceedingly long and slender, the inner medial one 

 attaining the length of the whole body Anterior antennae unusually long and 

 slender, being almost twice as long as the cephalic segment, and composed of 

 9 joints, the last of which however is so very small as easily to escape attention, 

 2nd joint the largest, 3rd joint twice as long as the 4th, terminal part about the 

 length of those two joints combined, and clothed with unusually long and slender 

 setse. Posterior antennae likewise more slender than usual, outer ramus well 

 developed, with the proximal joint fusiform in shape, its inner edge bulging con- 

 siderably in the middle, but quite smooth. Mandibles with the masticatory part 

 narrowly exserted, palp distinctly biramous, as in the other species of this genus. 

 Anterior maxillipeds with 3 somewhat unequal setiferous lobes inside the basal joint. 

 1st pair of legs with the outer ramus about the length of the 1st joint of the 

 inner, its last joint a little longer than the middle one; 1st joint of inner ramus 

 about twice as long as the other 2 combined, and having the seta of the 

 inner edge not far from the end, last joint larger than the middle one. The 

 3 succeeding pairs of legs exhibiting the structure characteristic of the genus. 

 Last pair of legs comparatively small, distal joint oblong conical in form and 

 densely ciliated on both edges, marginal seto 6 in number, 2 of them, however, 

 very small, hair-like; inner expansion of proximal joint linguiform in shape, and 

 extending about to the middle of the distal joint, its extremity provided with 4 

 spiniform setse increasing successively in length outwards, and at the outer corner 

 with a very small spinule. Ovisac rather small, rounded oval in form. 



Colour whitish, pellucid. 



Length of adult female 0.94 mm. 



Remarks. This form is at once distinguished from any of the 3 species 

 described in the main part of this work by its slender and graceful body and 

 the much produced anterior antenna? and caudal setse. It is the largest of the 

 known species. 



Occurrence. Several specimens of this handsome species were found last 

 summer at Korshavn in the same locality as that from which Ameira tenuicornis 

 was derived. 



Ameiropsis angulifera, G. 0. Sars, n. sp. 



(Suppl. PL 32). 



Specific Characters.- Female. Body of a similar slender form to that in 

 the preceding species. Urosome, however, somewhat shorter than the anterior 



