CRUSTACEA MALACOSTRACA. II. 



103 



rather strong, cylindric and armed at the tip with dentiform tubercles, furthermore by having the 

 pleopods uniramous without setae. Dollfus has established a new species as Haplocope (?) abyssorum, 

 but according to his figures I suppose that this species, which has no rami on the pleopods, does not 

 belong to Haplocope, but either to Leptognathia or, and more probably, be the type for a new genus. — 

 From the "Ingolf" I have a new species which is allied to H.angusta in the mandibles (fig. 4 c) and in 

 all other features of some importance excepting that the unimarous pleopods have very long setae. I 

 think that the best external character for Haplocope is that the pleopods are uniramous. 



66. Haplocope linearis n. sp. 



(Pl.X, figs. 4 a-4f). 



Female. Slender, between eight and eight and a half times as long as broad, tapering some- 

 what in breadth from the second thoracic segment to the end of abdomen (fig. 4a). — Carapace about 

 as long as second segment plus half of the third, slightly narrower than second segment, not much 

 longer than broad, about twice as broad behind the middle as at the front end and with the lateral 

 margins very moderately convex. 



Antennulse (fig. 4b) much shorter than the carapace, somewhat robust. First joint somewhat 

 shorter than the other joints combined, not fully twice as long as deep; second joint not quite half as 

 long as the first and feebly produced above, only a little longer than the third and a little shorter 

 than the fourth joint; longest terminal setse about as long as the two distal joints combined. — 

 Antennae somewhat short, with fourth and fifth joints completely fused. 



Chelipeds (fig. 4b) somewhat small. The basal joint with the posterior protuberance well devel- 

 oped, about as long as deep, with its rounded hind margin moderately distant from the lower front 

 angle of second thoracic segment. Carpus considerably longer than the basal joint, twice as long as 

 deep, with the lower margin considerably convex. Chela small, somewhat shorter than the carpus 

 and somewhat more than twice as long as broad; movable finger as long as the anterior margin of 

 the hand and towards the base much narrower than the fixed finger which has two long setae on its 

 straight posterior margin towards the hand. 



The thoracic segments (fig. 4a) more or less distinctly angular, and on the second segment 

 their lateral angles are situated far in front, on the following segments gradually more backwards, 

 consequently on the seventh segment only a little from the posterior margin. Third segment is more 

 than half as long again as the second, slightly longer than broad and slightly shorter than fifth 

 segment. — Thoracic legs slender and subequal in length, moderately long. Second pair (fig. 4 b) with 

 fourth and fifth joints subequal in length and their terminal spines long; sixth joint not fully half as 

 long again as the fifth and a little shorter than seventh joint with claw. Three posterior pairs 

 (fig. 4d) with most of the spines moderately long and their sixth joint a little shorter than seventh 

 with claw. 



Abdomen slightly shorter than the two preceding segments combined and the first segment 

 conspicuously narrower than the seventh thoracic segment. Five anterior segments with the ventral 

 margins considerably or very moderately convex (fig-. 4 f ). Pleopods (figs. 4 e and 4ft long and narrow; 



