92 



the proximal joint only very slightly expanded inside, but carrying tin- .'> usual 

 marginal setae; distal joint rather slender, resembling in form that in /. /'//rc'itn. 



Body of a whitish colour, without any distinct pigmentary ornament. 



Length of adult female 0.78 mm. 



/,'-///"//>. -This new species is nearly allied to 1. fuinitn. hut is of much 

 -mailer si/e and more slender form of body. In the relative length of the joints 

 of the anterior antenna 1 , it somewhat resembles /. ensifera; but the structure of 

 the 1st and last pairs of legs is rather different. 



Occurrence. I have found this form in considerable abundance in some 

 localities on the west coast of Norway, for instance at Her0, Kopervik and Buk- 

 keii. and occasionally also off the Finmark coast. It is a sublittoral form, gener- 

 ally oc( urring near the shores in campany with /. /'/// C'I/K. ovigerous females of 

 both species being at once distinguished by their very different size. 



5H. Idya longieornis, Scott. 



(I'l. I, IV. fig. I i. 



/////,/ /.i,/./,', ../-,/iV 'I'll. Bcott, iii Ann. ,< .M:ii:. .!' X:it. Hi-t. S.T. i. V>1. XV. p. Itil. I']. XVII. 



flgs. lo 17. 



r*. Fcmtilr. Korm of body rather slender, with the 

 anterior division, seen dorsally, ova! fusiform in outline, epimeral plates com- 

 paratively broad, subcontiguous, except the last pair. Urosome about half the 

 length of the anterior division and rather narrow, only slightly tapering distally. 

 < 'audal mini -hurt, apical seta?, however, much elongated. Anterior antennae ex- 

 ceedinglj slender and attenuated, with the :$rd and 4th joints unusually narrow 

 and elongated, both being of about e<|iial length, and somewhat exceeding that of 

 the 2nd joint: terminal part extremely narrow, and scarcely longer than the 4th 

 joint. First pair of le^s of inconsiderable si/e in proportion to the body, and 

 somewhat re>embling in structure those in /. /'nrciitn, the outer ramus extending 

 considerably he\ind the 1st joint of the inner. Last pair of le^s \\ ith the prox- 

 imal joint only vi-ry slightly expanded inside, the innei-most of the marginal setae 

 comparatively slmrt : distal joint very narrow, linear in form, being nearly (i times 

 as IOIIL' aa it is broad. 



Mody of a whitish colour, with a slight bluish ureen tinge, and exhibiting 

 at the posterior part of the cephalic segment a short transverse band of a dark 

 \io|;ieroiis hue. and another similar band across the middle of the urosome: an- 

 ti-rior antenii;i- with a small patch of the same colour near the end. 



Length of adult female 1 .."id mm. 



