386 



having only "> lather unequal marginal seta; innt-r expansion of proximal joint 

 \vitli '2 apical s,-ta- accompanied outside by a small spinule. 



Colour not yet ascertained. 



Length of adult female 0.77 mm., ol male 0..")7 mm. 



//- ///'///.-.-. -This is a very distinct and easily recognisable species, being 

 .-pecially characterised h\ tin- peculiar form of the rostrum and the structure of 

 the anterior antenna'. 



()c<-r/-in<-<'. On}\ 2 specimens of this form, a female and a male, have 

 hitherto eome undor my notice. They were found in a sample taken last summer 

 at Koislia\n. south coast of Norway, from a depth of 20 to .'5 fathoms, coar-e 

 sand\ hott"iii. 



Amphiascus nanoides, G. 0. Sars, n. sp. 



(Sii|,|,l. I'l. 21, fijv. 1). 



>/ i-i/ir ('lnirm-ti'rx. Fcmulf. Body comparatively slender, snblinear in 

 form. Rostrum narrow conical in shape. Urosome almost as long as the an- 

 terior division, last segment well developed. Caudal rami short, quadrangular; 

 middle apical set* rather strong and somewhat thickened in their proximal part, 

 exhibiting moreover a peculiar flexure, seta of outer corner unusually long. 

 Anterior antenna- rather slender, 8-articulate. first 2 joints the largest, 4th joint 

 onl\ slightly longer than 3rd, terminal part about the length of those joints 

 combined. Posterior antennae with the middle joint of the outer ramus very 

 Huall and without any seta. Posterior maxillipeds well developed, with the hand 

 oval filiform in shape. 1st pair of legs with the outer ramus about the length of the 

 1st joint of the inner, middle joint without any seta inside, last joint a little 

 longer and armed with 2 spines only and 2 geniculate seta-, distal spine coarsely 

 denticulated along the outer edge: inner ramus very slender, its last joint more 

 than .'{ times as lung as the middle one and armed in the usual manner, both 

 joints eonbined nearly as long as the 1st. Natatory legs slender, with the 

 number of sct considerably reduced. Last pair of legs with the distal joint 

 narrou oblong in shape and carrying 5 marginal seta-, the 2 apical ones \er\ 

 -b-nd'T; inner expansion of proximal joint triangularly produced and extending 

 CMii-ider.ihly beyond the middle of the distal joint, marginal >eta- ~> in number. 



Colour not yel a-cei taim-d. 



Length of adidt female 0..">i; mm. 



/////"//..-. This form belongs to the smaller species ot' the genus, and 

 may easily be reco-nis, d by the thickened caudal seta- and their peculiar flexure. 



