EUPHAl'SIA DISTINGUEXDA. 249 



in a small or nearly rudimentary, acute rostrum which is badly defined, broader 

 or much broader than long, about half as long as the breadth of second antennu- 

 lar joint or even conspicuously smaller. The gastric area well tleveloped, with 

 the median keel, seen from the side (fig. 3b), rather high and even slightly angular. 

 Eyes rather small; eye-stalks a little longer in proportion to their distal 

 breadth than in allied species and in \-er>- young specimens somewhat conspicu- 

 ously long. — The antemuilar petluncles moderately strong; the ])r()ximal joint 

 distally somewhat raised (hg. 3c) above the base of second joint, l)ut the lobe 

 may be termed rudimentary, as the terminal margin, seen from abo\-e (fig. 3d), 

 is somewhat convex and with a small incision rather near the midille. Second 

 joint at the upper outer distal angle with a rather short and high, oblique keel 

 (figs. 3c and 3d, p.) directed upwards and somewhat forwards, forming almost 

 an ear-like, rounded process; the distal ujiper niargin of the joint from this 

 process to the inner margin is somewhat oblicjue (fig. 3tl). Third ])eduncular 

 joint, seen from the outer side (fig. 3c), with its distal half occupied aliove by a 

 high keel, highest at the mitldle and, if well ]3reserved, with the distal upjx'r 

 angle rectangular and acute, the terminal margin a little conca\-e and oblique. — 

 The antennal scjuama is somewhat broad, less than three times as long as broad, 

 tapering considerabl\- towards tlie end so that the terminal transverse margin is 

 short antl there is no tooth from the outer angle; the spine-.shaped process 

 from the outer angle of the pedimcle nearly one third as long as the sfjuama. 



First and second abdominal segments slightly jiroduced al)o\'e at the middle 

 of the posterior margin, Init this produced i)art is rounded, scarcely angular. 

 Third segment posteriorly produce(l in a s])iniforni, compressed process, from 

 one third to nearly half as long as the following segment. P'oiu'th and Hfth 

 segments without any ti'ace of a dorsal tooth. Sixth segment long, twice as long 

 as deep. Preanal spine simple in both sexes. — Endopod of the ui-oi)ods slightly 

 longer than the exopod and as long as, or even a little longer than, the telson. 



The copulatory oi-gans (figs. 3e-3f) show some peculiar features. The 

 terminal process has a rather long foot and a very long, curved Ik'cI; the portion 

 beyonil the foot is moil('ratel\' shoi't, thick at the base, tapering considei'ablv 

 to beyond the miildle where it is curved somewhat inwards, while its distal part 

 is slender with the end scarcely acute. The proximal process (fig. 3f, \r'.) has 

 somewhat less than the proximal half stout and almost straight, then it bends 

 abruptlj' considerably inwards and becomes rapidly thinner, being at the midille 

 much narrower or even only half as broad as its proximal part: a little beyond 

 the niiiklle the inner side is almost abruplly considi'rably expanded, and this 



