348 



Copenhagen, determined and arranged by Kroyer, and find no essential difference 

 whatever, except that in a few of the specimens some of the anterior seg- 

 ments of the mesosome appear slightl}' carinated, with and indication of 

 compressed projections similar to those on the posterior ones. Also in a few of 

 the Norwegian specimens, I have observed, at least on the 4th segment of the 

 mesosome, a distinctly-developed though rather smaU dorsal projection, and 

 it would thus seem that under certain circumstances, some variation as to the 

 extension of the dorsal carina can take place in this species, llie form described 

 by the author at an earlier date from the Norwegian North Atlantic Expedition 

 as P. eiiacantha, in which all the segments of the mesosome are elevated to 

 compressed dor.sal processes, I am therefore now much inclined to regard, in 

 accordance with the opinion set forth by Dr. Hansen, as onh' an excessively 

 developed variety of the present species. As pointed oiit by the last named 

 author, only the description given byBoeck applies to the form in question, 

 whereas all the figures reproduced in his great work are evidently referable 

 to the following nearly allied species, to which Dr. Hansen has therefore 

 given the name of P. Boecldi. 



Occurrence. I have met with this form rather abundantly in several 

 places off the west coast of Norway, as also in the TrondhjemsiJiord, in greater 

 depths ranging from 80 to 150 fathoms, especially in the region of the deep-sea 

 corals. It extends northwards along the Nordland coast to Finmark, where 

 I have collected it pretty frequently at Hammerfest. 



JDistrihuiion. — Greenland (Kroyer), Iceland (Torell), Spitsbergen 

 (Goes), coast of Bohuslan (Bruzelius). 



3. Paramphithoe Boeckii, Hansen. 



(PI. 122, fig. 2.) 



Pa>'a»ip/ii^/ioe i>oeciu, Hansen, Malaeostraca marina Gronlandise occidentalis, p. l'21,ri. 6,flg3. 



Syn. : Pleustes pulohellus, Boenk, (the fignres, but not the desrription). 



Body of much the same form as that in the preceding species, though 

 perhaps somewhat more tumid in its anterior part, especially' in ovigerous female 

 specimens. Last segment of the mesosome only, and the first 2 segments of 

 metasome elevated to compressed, recurved, dorsal projections, the other seg- 

 ments without any trace of processes. Cephalon considerably exceeding in length 

 the first 2 segments of mesosome combined, and distinctly carinated dorsally, 

 front produced to a rather large hooded rostrum reacliing about to the middle 

 of the basal joint of the superior antennae, lateral corners narrowly rounded, 

 postantennal ones but slightly produced. Coxal plates without any serrations; 

 1st pair scarcely tapering distally, tip rounded; 4th pair with the posterior 



