M\l . >STRACA III. 43 



,t Maml f fust pair of legs with the margins subparallel to the truncate end; terminal margin 

 of the preceding joint conspicuously longer than seventh joint with claw a. P. latimanum n. up. 

 h. Coxa: of at least second to fourth pairs of legs with conspicuous processes. 



o. Processes on the coxae of second to fourth pairs of legs in the female somewhat .short, acute; 

 in both sexes no processes or tubercles on the three posterior pairs of cow. Surface of 

 abdomen not distinctly scaly 3. P. intermedium n. sp. 



/?. Processes on the coxae of second to fourth pairs of legs in the female rather long, sub- 

 cylindrical with the end obtuse; in both sexes distinct short processes or protuberances on 

 at least fifth and sixth pairs of coxa;. Surface of abdomen of a most conspicuously scaly 



appearance 4. P- rubicundum G. O. S. 



\ Conspicuous lateral processes on at least the four anterior segments. 



a. Well developed processes on all seven pairs of coxae; no lateral processes on the three posterior 

 segments 5- /'. spinosissimum G. O. S. 



b. No processes on the coxae; lateral processes on the three posterior segments. (Conspicuous 

 processes in the dorsal median line of the thorax) 6. P. pulchrnni n. sp. 



24. Pleurogonium inerme G. O. Sam 



(PI. Ill, figs. 8 a 8 b.) 



1883. Pleurogonium inerme G. O. Sars, Forh. Vid. Selsk. i Christian!. i f. 1882. No. 18, p. 67; PI. II, fig. 5. 

 ! 1897. G. O. Sars, Account, II, p. 114; PI. 48, fig. i. 



The males are smaller and especially much narrower than full-grown females. In both sexes 

 the coxae of the four anterior pairs of legs (fig. 8 a) have a low tubercular protuberance on the margin, 

 while on the coxae of the three posterior pairs at most vestiges of tubercles are found. The 3-jointed 

 antennular flagella are scarcely as long as the sum of the two distal peduncular joints, but the length of 

 the two distal fiagellar joints varies considerably, each of them being either scarcely or considerably 

 longer than third peduncular joint, and generally longer in the male than in the female, but not as 

 long as in the male of P. lattmanuin. 



First pair of legs (fig. 8 b) have their major distal part more slender than in P. latimanum. 

 I', intermedium or P. rubicundum\ fourth joint is somewhat longer than broad; sixth joint is oblong- 

 ovate with the lower margin arcuate; seventh joint has two teeth, and the sum of this joint and its 

 daw is not shorter than the distal breadth of fifth joint Surface of abdomen without distinct scaly 

 appearance. 



Length of a large female with marsupium 2 iiiiu., of a male 1*5 mm. 



Occurrence. Not taken by the "Ingolf". 



It has been gathered in two places at the east coast of Iceland, viz. by Dr. A. C Johaiisen in 

 Bakka Fjord, 2532 fath., i spec, and 4352 fath., i spec, and by Mag. R. Honing in Faskrnds Fjord, 

 3050 faUu, 3 spec. Furthermore taken by the Ilnd Amdrup Exped. at Jan Ma yen, 5060 fath., 

 large number of spec 



Distribution. Taken in the Sound off Landskrona, 1728 fath. (Bjorck); at Denmark in 



