CRUSTACEA MALACOSTRACA. II. 



55 



and somewhat narrower than the seventh. Second segment is about half as long as the third and 

 tapers much in breadth from the anterior to the posterior end; it has a small, oblique ventral process 

 from the lower front end. Third segment with the lateral margins considerably converging from the 

 anterior to the posterior angles. Fourth segment with the lateral margins strongly angular consider- 

 ably before the middle and from these angles converging towards both ends. Fifth segment slightly 

 longer than broad, and its lateral margins strongly angular somewhat behind the middle; sixth seg- 

 ment with the lateral margins strongly angular still nearer the posterior margin; seventh segment in- 

 creases much in breadth from the anterior end to rather near the hind margin. Thoracic legs 

 moderately long. Second pair (fig. yb) with the setse short excepting the seta on the posterior margin 

 of sixth joint; fourth joint somewhat longer than the fifth and as long as the sixth; seventh joint 

 with claw only two-thirds as long as sixth joint. Third pair with fourth joint shorter than the fifth, 

 which is somewhat shorter than the sixth; fourth joint with some minute spines on the posterior 

 margin, setae on fourth and fifth joints short, distal seta on the anterior side of sixth joint rather long; 

 seventh joint with claw scarcely half as long as sixth joint. Three posterior pairs of legs moderately 

 strong (fig. 70); second joint about two and a half times as long as broad; fourth joint (fig. 7d) with 

 a row of very short, tooth-shaped, small spines along the distal half of its anterior margin and two 

 much larger spines before the end; fifth joint with a close row of small tooth-shaped spines along the 

 major part of the convex front margin, a similar, curved row on the outer side, and a moderately 

 long, very thick spine at the distal end; sixth joint only a little shorter than the two preceding joints 

 combined, moderately stout, with a large number of quite minute denticles along the anterior part, 

 two moderately long and very thick spines near the end and three much longer terminal spines, two 

 of which with a few strong teeth on the concave margin and the third with a number of denticles 

 along the major distal part of the corresponding margin; seventh joint with claw somewhat short, on 

 seventh pair less than half as long as sixth joint, and both joint and claw with some few denticles 

 on the concave margin. 



Abdomen broader than seventh thoracic segment, but scarcely as broad as the second, slightly 

 longer than seventh segment and half of the .sixth combined; its hind margin transverse, feebly an- 

 gular at the middle. - Uropods (fig. 76) moderately long, somewhat slender; endopod with the first 

 joint a little longer than the second; exopod reaches slightly beyond the middle of second joint of the 

 eudopod, two-jointed, with second joint about two and a half times as long as the first. 



Length of the single specimen 4.18"'. 



Remarks. T. grandis is much larger than any other species of this genus found by Sars or 

 the "Ingolf", but agrees in this respect with three species established by Dollfus (1897) on specimens 

 taken by the Prince of Monaco. T. grandis is readily distinguished from the three last-named species 

 by various characters (comp. Dollfus' figures) and from all forms seen by me by the peculiar armature 

 of the posterior pairs of legs. In the shape of the thoracic segments T. grandis is somewhat similar 

 to T. irregularis, but differs widely in several other features. 



Occurrence. Taken by the "Ingolf at a single station. 



South of Iceland: St. 54: Lat. 63o8' N., Long. 15 40' W., 691 fm., temp. 3.9; i spec. 



