102 



of 400 fathoms. Subsequently I have found it occasionally off the coasts of 

 Nordland and Finmark, in depths ranging from 100 to 150 fathoms. Out of 

 Norway it has not yet been recorded. 



Gen. 3. IaniropSiS, G. O. Sars, n. 



Generic Characters. — General habitus that of Ianira. Lateral parts of 

 the segments but slightly expanded, not laciniate. Eyes well developed. Superior 

 antennae comparatively small, with the nagellum only composed of a limited number 

 of articulations. Inferior antenna? of moderate length, being much more strongly 

 built in male than in female; squamiform appendage in both sexes very small, 

 but distinctly defined. Maxillipeds with the 2nd and 3rd joints of the palp very 

 much expanded, laminar. Legs comparatively short and thick, with the dactylus 

 bi-unguiculate ; 1st pair in female not differing at all from the others, in male, on 

 the other hand, remarkably developed, prehensile, much longer than any of the 

 other jjairs, with the carpal joint fusiformly dilated. Middle piece of male oper- 

 culum remarkably dilated at the tip. Uropoda of same structure as in Ianira, 

 but much shorter. 



Remarks. — This new genus is founded upon the form recorded by the 

 present author as Ianira breviremis. A closer examination of this form, and more 

 especially of the male, has revealed some characteristic features, which make it 

 advisable to separate it generically from Ianira, and such a separation was also 

 opined by Dr. Bovallius to be necessary. It is especially the structure of the 1st 

 pair of legs which is characteristic. In the female, this pair, unlike what is the 

 case in Ianira, do not differ in any manner from the others legs, being, like these, 

 ambulatory. On the other hand, this pair assumes in the male a quite extra- 

 ordinary development, being pronouncedly prehensile, and much larger than any 

 of the other legs. Moreover, the structure of the superior antennse and the 

 maxillipeds is slightly different, as also the middle piece of the male - operculum. 

 The genus contains as yet but a single species, to be described below. 



Ianiropsis breviremis, G. O. Sars. 



(PL Xlill.) 



Ianira breviremis, G. O. Sars, Oversigt af Norges Crustaoeer I, p. 64, PL 2, fig. 4. 



Specific Characters. — Body oblong oval in form, fully twice as long as it 

 is broad, and very slightly narrowed both in front and behind. Cephalon rather 



