CRUSTACEA MALAC08TRACA. III. 



Abdomen slightly longer thau the two posterior thoracic segments combined, somewhat or 



broftflfc is,..- tin- I..IM tli. in lu-t Hi n-.nt ,,| th, ui, .p,..l, i,.; ;i ERM DOMUemU; ll 



to a little more than half as long again as broad (fig. 4 g), with the major part of the lateral margin* 

 distinctly convex; posteriorly the abdomen is very moderately prodnced and broadly rounded, with 

 each half of the posterior margin slightly or scarcely concave towards the uropods. The operculutn 

 <& 4 g) >* moderately large, twice or slightly more than twice as long as broad, posteriorly moderately 

 narrow and rounded, and reaching scarcely to the insertion of the uropods; the anal doors unusually 

 short, yet occupying most of the rather short part of the ventral excavation behind the operculurn. 

 The uropods (fig. 4 1) a little more than half as long as the abdomen, somewhat slender, two-jointed, 

 with first joint from twice as long as the second to only somewhat longer. 



Length of two females with marsupium 32 mm. and 2-9 mm. 



Remarks. M. subinrrmis is sharply distinguished from the three preceding species by having 

 the abdomen rather feebly produced posteriorly, and by the uropods, etc. It is allied and similar to 

 M. longiremis Mein., but its uropods are shorter, the ventral armature on the thorax is feebly devel- 

 oped, while in M. longirrmis the ventral processes on first segment and especially those on the posterior 

 segments are long and slender; the posterior end of the female operculum is conspicuously narrower 

 than in M. loHgiremis, and appreciable differences are also found iu third pair of legs and their seta. 



In a young female with seventh pair of legs only half developed, the uropods, especially their 

 iirst joint, are shorter (fig. 4 h) than in the adults. The single male found (from StaL 139) is scarcely 

 adult and has the operculum very mutilated; it differs from the females in having the ventral thoracic 

 processes conspicuously longer, the abdomen about half as long again as the uropods, and these uropods, 

 which consequently are proportionately longer than in the females, have the first joint slightly more 

 than twice as long as the second; in other respects this male does not show any differences worth 

 mentioning from the female. 



Occurrence. Taken by the "IngolF at five stations, all in the cold area. 



North of the Fseroes: Stat 139: LaL 63^36' N., Long. j"yo' W., 702 fath., temp. -5-0-6; 2 spec 



East of Iceland: StaL 103: LaL 6623' N -. l -*> n K- 85a' W, 579 fath., temp. +06; i spec. 

 StaL loa : LaL 6623' N., Long. 10 26' W., 750 fath., temp. -j-otj ; 10 spec 



North-East of Iceland: StaL 119: LaL 67*53' N., Long. ioi9' W., 1010 fath.; temp, -f- ix>; a spec. 



North of Iceland: StaL 125: LaL 68o8' N., Long. i6o2' W., 729 fath.; temp. -7- 0-8; 2 spec 



Besides, it has been taken by the "Thor" at the following place in the cold area. 



East of Iceland: LaL 66i9' N., io45' W., 765 fath., temp. -=-0-92; i spec, (young ?). 



50. Macrostylis longiremis MeinerL 

 (PL VII, fig. 5 a). 



1890. Vana longiremis MeinerL "Hauchs" Togter, p. 195; PI. II, figs. 6373. 

 ! 1899. Macrostylis longiremis G. O. San, Account, II, p. 250; SuppL PL II, fig. i. 



Sars has published good figures of the animal from above, of antennulte, antenme, maxillipeds 

 and several legs. As already stated in my remarks on M. subinrrmis, the processes on fat stemitr 



TW l^ilTF.f.fcl... IM. t . II 



