CRUSTACEA MALACOSTRACA. IV. 21 



on the lower side near the outer margin ; merus with a distal tooth on the outer margin ; carpus conspicuously 

 longer than propodus and twice as long as dactylus. Second pair of legs with carpus somewhat elongated, 

 distinctly longer than the two distal joints combined. -- Uropods (fig. 7 d) somewhat similar to those in L. 

 serratus; the peduncle is a little shorter than the exopod, with about 6 spines along the inner margin; the 

 exopod is somewhat slender, with the normal seta; along the inner margin and on the end, and a few short 

 setae on the outer margin of second joint near its base; the endopod is considerably shorter than the exopod, 

 its first joint nearly more than two and a half times as long as the second, with about 8 spines along the 

 inner margin, and some of them long; second joint with 4 spines along the inner margin, and 2 long spines 

 on the end, the outer somewhat longer than the inner and as long as the joint. 



Length of the largest specimen, a female with the marsupium half developed, 6.1 mm. 



Remarks. L. robust us agrees with L. nasicoides and differs from all other northern or European 

 forms in having 3 pairs of teeth on the frontal lobe, but the arrangement of these teeth is sharply different 

 in the two species. The uropods afford a good character in having the distal joint of the endopod rather short. 



Occurrence. Taken by the "Ingolf" at a single station in the warm area. 



Davis Strait: Stat. 36: Lat. 6i°5o' N., Long. 56°2i' W., 1435 fath.. temp. 1.5 ; 2 immature females. 



Eudorella Nor 



man. 



This genus is richly represented in our area, but excepting a single species the other forms are difficult. 

 On the following pages I have recorded 6 species, viz. E. emarginata Kr. and 5 species allied to E. truncatula 

 Bate and E. hirsuta G. O. Sars, but apparently not belonging to any of these forms; 4 of the 5 species are 

 established as new. Especially the forms with only 2 or 3 saw-teeth above the antennal notch in the female 

 are very difficult, because, as already pointed out by Caiman, there is some individual variation in the arma- 

 ture of the anterior margin of the carapace and in other particulars generally used as specific characters. 

 Though my material is good, adult and subadult females ought to be collected at a much higher number 

 of stations within the "Ingolf" area and farther south before the individual variation and the limitation of 

 some of the species can be finally and satisfactorily decided. Meanwhile the following descriptions with fig- 

 ures may serve as help for a future investigator. It may only be added that there is probably a somewhat 

 high number of species of Eudorella, as the allied genus Eeueon really has numerous northern species, and 

 in the latter genus they can as a rule be separated with certainty, while in Eudorella the characters are gener- 

 ally more difficult to discover and point out, so that at the present time the personal judgment must in some 

 cases be applied more than desirable by the limitation of species. 



17. Eudorella emarginata Kroyer. 



1S46. Leucon emargmatus Kroyer, Naturh.Tidsskr. 2. Raekke B. II, p. 1S1, 2oq, 211, Tab. II, Figs. 3, a — h. 

 1S49. Kroyer, in Gaimard, Voy. en Scand., Crust. PI. V a, fig. 2, a — s. 



!iqoo. Eudorella emarginata G. O. Sars, Account, III, p. 36, PI. XXYII — XXVIII. 

 1913. Stebbing, Das Tierreich, 39. Lief. p. 75. 



