CRUSTACEA MALACOSTRACA. III. 



45 



/9. Hand of first pair of legs with the margins subparallel to the truncate end; terminal margin 

 of the preceding joint conspicuously longer than seventh joint with claw 2. P. latimanum n. sp. 

 b. Coxse of at least second to fourth pairs of legs with conspicuous processes. 



a. Processes on the coxse 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 coxae. Surface of 

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



/9. Processes on the coxse 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 coxse. Surface of abdomen of a most conspicuously scab 



appearance 4. /'. rubicundum G. O. S. 



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



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

 segments 5. P. spinosissimum G. O. S. 



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

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



24. Pleurogonium inerme G. O. Sars. 

 (PI. Ill, figs. 8 a— 8 b.) 



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

 ! 1897. — G. O. Sars, Account, II, p. 114; PI. 48, fig. 1. 



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

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

 while on the coxse 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 flagellar 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. latimanum. 



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

 P. 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 

 claw 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 mm., 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. Johauseu in 

 Bakka Fjord, 25—32 fath., 1 spec, and 43—52 fath., 1 spec, and by Mag. R. Horring in Faskruds Fjord, 

 20—50 fath., 3 spec. — Furthermore taken by the Ilnd Amdrup Exped. at Jan Mayen, 50—60 fath., 

 large number of spec. 



Distribution. Taken in the Sound off Landskrona, 17 — 28 fath. (Bjorck); at Denmark in 



