BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND 27. AFD. IV. N:0 8. 48 



It ranges vertically from 200 until 2000 m. Length of 

 greatest spec. 50 mm. The specimen from stat. 40, 1898, 

 seems to be somewhat larger, but as it was not complete, 

 its real size conld not be ascertained. 



Hippolyte Leach 1813. 



Tbis genus includes numerous species many of which 

 have been for a long time known. However. stränge to say, 

 but few families amongst tbe Macruia are involved in such 

 confusion and are so mucb in need of a critical revision as 

 this. In 1888, Spence Bate, when examining tbe material 

 collected by tbe »Challenger>^ subdivided bis family Hippohjfida: 

 into several genera. He based bis division mainly on tbe 

 structure of tbe mandible, if provided witb »synapbipod» 

 (= palp) and »psali stornäs (= cutting edge) or not, on tbe 

 number of tbe joints constituting tbe fiftb joint or carpos 

 (= »wrist») of tbe second pair of pereiopods and on tbe num- 

 ber and structure of brancbia^. Mainly by using tbese cba- 

 racteritics be was able to arrange tbe »Cballenger» Hippo- 

 lytidoi s. str. under no less than nine dilFerent genera. 



It is only to be regretted tbat be did not at tbe same 

 time examine and classify otber forms belonging to tbis fam- 

 ily. As far as I know, no otber attempt bas been made 

 since tbat time as to a monograpbic study of tbe group. 

 Amongst writers after Spence Bate some bave adopted bis 

 genera, otbers not. 



In bis very useful and important book: ;>A History of 

 Crustaceas Stebbinö gives some interesting and critical 

 reflections botb on Spence Bate's new and somewbat compli- 

 cated nomenclature, as well as on special points in bis classi- 

 fication. In regard to Hippolytidce, be adopts,^ among otbers, 

 Spence Bate's Spfronfocaris-, to wbicb he refers tbe following 

 North Atlantic and Arctic species: Uipjpohjtc spinns, H. tur- 

 glda, H. Cranchn, H. pusiola, H. xwlaris. 



As to tbe genus Heta I rus, tbe type of wbicb Spence Bate 

 regards onr common Arctic Hq)polt/t( Gaimardi, Stebbing 



' ]. c. p. 236, Arctic fräst. 1. c. p. 10. 



