57 



two and a half times as long as broad, increasing in breadth outwards, with the terminal lobe 

 about twice as broad as long and reaching a little beyond the end of the long second joint of 

 the endopod; a suture across the terminal lobe was not discoverable. Maxillse (fig. 2d) with 

 the exopod smaller and the distal joint of the palp narrower than in G. Normani, the latter 

 joint being more than twice as long as broad. First abdominal segment in the female with the 

 lateral plates and its pleopods (figs. 20 — 2/) quite as in G. Noriiiani. 



The male pleopods differ all less or more from those in G. Nortnani, though they 

 are more similar to those than to the pleopods in any other European species; before the 

 description it may be mentioned that my figures of all five pairs were drawn with the same 

 degree of enlargement, so that a comparison between these figures shows the relative size of 

 these appendages. F"irst pair (fig. 2 h) have the endopod oblong-ovate and almost three times 

 shorter than the exopod, the distal part of which is divided into four joints. Second pair (fig. 2 /) 

 somewhat less than twice as long as the first; the peduncle nearly as long as the exopod which 

 is a little curved with the distal half moderately slender and divided into five or six joints, 

 the four distal of which bearing a small spine at the end ; the endopod is half as long as the 

 exopod, unjointed or articulated near the end, with the inner margin straight, and it widens 

 gradually from the base to the middle, where it suddenly becomes somewhat narrower and 

 tapers to the end. Third pair (figs. 2k — 2/) even a little more than two and a half times as 

 long as the second and reaching beyond the middle of the telson ; an independent endopod is 

 not found, but the basal part of the exopod has the appearance as if the proximal half of an 

 oblong, naked joint is fused with its side, so that the distal part of this joint, the endopod, 

 projects as a kind of process ; the articulations of the exopod are partly feeble or even impossible 

 to make out with certainty (but I have drawn them as they appeared to be); the exopod bears 

 two slender spines or nearly spiniform setse a little beyond the free end of the endopod, and 

 it terminates in three small setae. Fourth pair of pleopods (fig. 2 ni) are very small, scarcely 

 one-third as long as second pair, with both rami unjointed, the exopod twice as long as the 

 peduncle and a little longer than the endopod. Fifth pair (fig. 2 n) distinctly longer than the 

 fourth but similar in structure; the exopod somewhat longer and narrower than the endopod. 



Uropods (fig. 2q) of the usual shape; exopod with about 13 marginal spines; endopod 

 with 5 spines along the inner margin. Telson (fig. 2q) somewhat less than three times as long 

 as broad, thus a little shorter than in G. Noruiani, with 9 or 10 spines along each margin, 

 the terminal spine included; among these spines the terminal and the penultimate pairs are 

 much longer than the others, yet at most about twice as long as the antepenultimate pair 

 (fig. 2;'); the distance between the spines of second and third pairs is much longer than between 

 any two other pairs. 



Length of the male 6.8 mm., of the female 7.5 mm. 



Remarks. — This species is closely allied to Haplostylus erythr^7is Kossm. founded 

 on a single male, but according to Kossmann's description and figures the pleopods differ from 

 those in G. indicus in several particulars, among which may be noted, that in the second pair 

 the endopod is nearly as long as the exopod and four-jointed, while the two posterior pairs 

 have the exopod three-jointed. 



SIBOGA-E.XPEDITIE XXXVII. 8 



