216 THE SCHIZOPODA. 



The eyes are somewhat small, dark brownish or nearly black. — The an- 

 tennulae have the first joint of the peduncle short and very broad, with a mod- 

 erately short, spiniform process from the distal outer angle; above the joint 

 is distally strongly raised as an obliquely transverse, vaulted part, from which 

 a subquadrangular lobe projects forwards, closely covering not quite the inner 

 half of the proximal part of second joint; this lobe is moderately thick, with 

 the outer margin nearly straight or a little convex, the distal margin not longer 

 than the base and the outer distal angle either simple or produced in a small 

 tooth; the upper surface of the lobe is set with somewhat short, stifT setae. The 

 second antennular joint is produced anteriorly above into a kind of short, broad, 

 distally rounded lobe, the front margin of which begins at a point somewhat 

 removed from the outer angle of the joint and goes inwards and considerably 

 forwards to the inner margin of third joint. Third joint with the dorsal keel 

 well defined, but low. — The antennal squama reaches at least to the distal end 

 of second antennular joint; it is broad, with the end nearly truncate and with- 

 out any outer distal tooth. The .spiniform process from the peduncle about one 

 third as long as the squama (fig. 5b) . — The maxillulae (fig. 5c) essentially as in 

 T. aequalis, but the proximal lobe has the end nearly obliquely cut off, the distal 

 lobe is considerable widened towards the end and much broader than long; the 

 palp is slender, about four times as long as broad, reaching the end of the distal 

 lobe; the pseudexopod is extremely large, twice as long as broad and reaches 

 about the end of the palp. 



The abdominal segments are without any dorsal denticle; the side-plates 

 of second to fourth segment with the lower margin a little emarginate. The 

 preanal spine middle sized, simple, curved, and acute. — The uropods about 

 as long as the telson, with the endopod a little shorter than the exopod. — The 

 telson with six or seven pairs of dorsal saw-teeth. 



The copulatory organs (figs. 5d-5f) show several distinguishing features. 

 The spine-shaped process (p'.) is well developed, placed at the inner margin of 

 the inner lobe not far from its end. The terminal process (p-.) of moderate length 

 and thickness, slightly curved, seen from behind (fig. 5d) with the distal third 

 tapering to the obtuse end; seen from the inner side (fig. 5e) the distal part 

 is compressed with the outer margin somewhat serrate, the other margin some- 

 what convex. The proximal process (p^.) with the basal portion very thick and 

 directed much outwards; then it bends abruptly forwards and at the bend a 

 kind of heel-shaped process is directed outwards; the major distal part is, seen 

 from behind (fig. 5d), feebly curved, seen from the inner side (figs. 5e and 5f) 

 considerably curved beyond the middle and somewhat expanded but tapering 



