158 



inner, middle joint about the length of the 1st, terminal joint a little longer and 

 armed with 4 spines and a slender geniculated seta inside them ; inner ramus with 

 the 1st joint not much longer than the other 2 combined, last joint linear in form 

 and twice as long as the 2nd, carrying a slender claw, a somewhat longer seta, 

 and a small hair-like bristle. Natatory legs resembling in structure those in A. 

 imus; middle joint of inner ramus in 3rd pair of legs, however, like that in 2nd 

 pair, with 2 setae inside. Last pair of legs with the distal joint oblong oval in 

 form, carrying 6 marginal setae, 3 outside, one inside, and 2 very slender ones 

 at the tip; inner expansion of proximal joint narrow triangular in form and ex- 

 tending almost as far as the distal joint, marginal setae 5 in number. Ovisacs 

 less narrow than in A. imus. 



Colour light yellowish grey. 



Length of adult female 1.16 mm. 



Remarks. The above-described form is unquestionably that recorded by 

 Dr. Giesbrecht as Stenhelia ima. It is, however, most certainly distinct from 

 Brady's species, differing, as it does, both in size and in several of the anatomi- 

 cal details. One character which distinguishes the present species in a marked 

 degree, and which is well described by Dr. Giesbrecht, is the peculiar bag-like 

 dilatation of the largest of the caudal setae, a feature which ensures the immediate 

 recognition of this species from any of the others known. 



Occurrence. Only a solitary, but well preserved female specimen of this 

 form has hitherto come under my notice. It was taken many years ago off the 

 west coast of Norway, the exact locality not being stated. 1 ) 



Distribution. Bay of Kiel (Giesbrecht). 



100. Amphiascus propinqvus, G. 0. Sars, n. sp. 



(PI. XCIX). 



Specific Characters. Female. Body moderately slender and only slightly 

 attenuated behind. Cephalic segment about the length of the 4 succeeding seg- 

 ments combined; rostrum well developed, lanceolate, extending nearly to the end 

 of the 2nd joint of the anterior antennae. Urosome almost attaining the length 

 of the anterior division, last segment fully as long as the preceding one. Caudal 

 rami short, quadrangular, broader than they are long, the 2 middle apical setae 

 only slightly dilated at the base. Anterior antennae slender and attenuated, 

 8-articulate, the first 2 joints much the largest, 4th joint nearly twice as long as 



l ) Found this summer occasionally at Flekkero, south coast of Norwa^y. 



