210 THE SCHIZOPODA. 



The eyes are of moderate size, with the eye-stalks short. — The antennular 

 peduncles are somewhat short and in adults very thick (Plate 4, figs, la and lb); 

 in a little more than half-grown specimen much more slender (fig. Ic). Seen 

 from the side (fig. la) the distal upper part of the first joint is raised as a high 

 and thick, vaulted, setose roof above the insertion of the second joint; seen 

 from above (fig. lb) the same distal part is produced forwards as a short triangle 

 with the inner angle acute, but without any process or armatm'e; on the outer 

 margin of the joint a somewhat small, oblong process is seen. The second 

 joint in the adult has, seen from the side (fig. la), its distal half considerably 

 vaulted above; seen from above (fig. lb) its breadth is as long as its inner margin, 

 while distally and a little nearer the outer than the inner margin it is produced 

 forwards in a triangular, acute lobe considerably broader than long and with 

 its end pointing outwards and especially forwards. Third joint in the adult 

 with the distal part of the upper margin considerably arched, rounded, but 

 the dorsal crest is not well defined. In considerably smaller specimens the 

 vaulting of the distal parts of the joints is much less developed (fig. Ic). — The 

 antennal squama reaches the middle of third antennular joint and has a distinct 

 triangular tooth at the outer distal angle; the spiniform process from the outer 

 end of the peduncle is scarcely one fourth as long as the squama. 



The maxillulae (Plate 4, fig. Id) are in the main intermediate between those 

 in T. {ricuspidata and in the following forms. The proximal lobe is consider- 

 ably smaller than in T. tricuspidata and somewhat angular at the inner distal end; 

 the distal lobe is much broader than the proximal, a little widened towards the 

 terminal margin which is shghtly convex ; the palp is somewhat longer than the 

 distal lobe, narrow, between three and four times as long as broad and tapering 

 beyond the middle. The pseudexopod is a little broader and distinctly longer 

 than in T. tricuspidata, but not reaching much beyond the proximal angle of 

 the insertion of the palp. 



The lateral plates of the five anterior abdominal segments are broad and 

 deep; those of second to fourth segments with the lower margin a little irregu- 

 larly emarginate; fourth and fifth segments each with a dorsal spiniform den- 

 ticle; sixth segment uncommonly short and deep. The inner ramus of the 

 uropods conspicuously shorter than the outer which reaches a little beyond 

 the tip of the telson. — Telson has in Sars's type seven pairs of dorsal spines 

 (it is mutilated in my adult specimen). 



The copulatory organs (Plate 4, figs, le-lh) show some peculiarities. The 

 spine-shaped process (p^) is moderately curved. The terminal process (p'.) 



