CRUSTACEA MALACOSTRACA. III. 2I -, 



three posterior pairs of thoracic legs, and last abdominal segment, so that only the few differences 

 observed need be mentioned. 



The antennulse (fig. 3 c) show a few differences. First joint is longer in proportion to breadth, 

 the outer margin less concave, the anterior part of the postero-lateral margin has a sharp angle and 

 two minute, low, rounded teeth; nearly the posterior half of the inner margin is curved considerably 

 outwards and has six acute teeth, the two anterior somewhat small, the three posterior much larger 

 and oblong-triangular; finally a small rounded plate with two short hairs protrudes at each side of 

 the terminal tooth. Second joint is nearly similar to that in A.pulchripcs, but third joint protrudes 

 (at least in my specimen) beyond the outer margin of second joint, and bears a beautiful fan-shaped 

 bundle of sensory filaments. -- Sixth pair of legs (fig. 3d) as in A.pulchripcs, excepting that sixth 

 joint is a little more elongate: 



Length 1-58 mm. 



Occurrence. Found in the marsupium of a specimen of Astacilla granulataQ. O. Sars taken 

 by the "Ingolf". 



South-East of Iceland: Stat. 4: Lat. 6d, Q of N., Long. n°i2' W., 237 fath., temp. 2-5°; 1 spec. 



Parapodascon n. 



gen. 



Female. Body (fig. 4a) ovate both from below and from the side, without legs, but the cen- 

 tral half of the ventral median line shows organs, viz., in front a pair of minute conical antennulse, 

 rudiments of a mouth, and along the median line five pairs of rounded lobes, all very short, the first 

 pair, besides, narrow and the others broad, and between these rows of lobes are seen some few of the 

 eggs from the incubatory cavity. 



Male. Eyes wanting. The antenuulse of very moderate size (fig. 4c); first joint with several 

 obtuse teeth along the posterior margin; second joint with some acute teeth along the same margin. 

 All epimera posteriorly divided into a number of comb-teeth (fig. 4 c). The three posterior pairs of legs 

 (figs. 4e — 4 g) characteristic; the hand with a single marginal spine; seventh joint long and slender, 

 in sixth pair (fig. 4 f) longer than in the two other pairs and distinctly expanded at the end ; the 

 claw very slender, well marked off and moderately long. 



Remarks. This genus is established on a species in all probability identical with Podascon (/) 

 Slebbingii Giard & Bonnier, a name given by the French authors to a male described and figured by 

 Stebbing. The female differs so widely from that of the genus Podascon Giard & Bonn., that a new 

 genus was necessary for the reception of the species described below. The male of Podascon is un- 

 known, and not only were the French authors uncertain, but Sars entertained grave doubt whether 

 the male described by Stebbing belonged to Podascon or to another genus. 



156. Parapodascon Stebbingii Giard & Bonnier. 

 (PI. XVI, figs. 4 a~ 4 g). 



1894. Description and figures without name in: Stebbing, The Amphipoda coll. during the voyages 



of the Willem Barents; Bijdragen tot de Dierkuude, Afl. 17, p. 46 — 47. 



The Ingolf-Expedition. III. J. 20 



