288 



one another than their terminal spines. The 4''' carina, which is unarmed, runs quite straight, 

 nearly midway between the y^ and the lower border of the carapace, from the posterior 

 margin forward, just below and a little beyond the posterior extremity of the antennal 

 carina, without reaching, however, the lower border. According to Doflein this 4'"^ carina should 

 bifurcate anteriorly, one part should run to the antennal spine, the other to the lower margin 

 of the carapace, but in Professor Zimmer's sketch these carinae run like in the present specimens. 

 The lower margin of the carapace is marginate, between it and the 4"' carina the carapace 

 is quite smooth. 



Abdomen 2Yo-times as long as the carapace, rostrum included. The i^' and the 2"^ 

 terga are not carinated in the middle line, the posterior part is slightly elevated above the 

 anterior, the boundary-line runs nearly parallel with the posterior margin of the somite, though 

 it slightly approaches it downward. On the i" somite one observes a slightly curved longitudinal 

 carina that forms the demarcation between tergum and pleuron; this carina, though not reaching 

 to the anterior margin of the somite, may be regarded as a continuation of the 2'^<* carapacial 

 carina and a little below it a second .shorter carina, continuous with the 3'''^ carapacial, e.xtends to 

 the middle of the pleuron. The demarcation between the tergum and the pleuron oftiie 2'"' somite 

 is also formed by a longitudinal curved carina, the convex side of which is turned towards the 

 pleuron. The 3"' and the 4''' somite are carinated in the mid-dorsal line, these carinae are 

 flattened and while the carina of the 3'''' slightly widens from before backward, that of the 4''' 

 slightly narrows in the same direction. The 5''' somite has two dorsal carinae that diverge a 

 little from before backward and the 6"' bears a pair of more widely separated and parallel 

 crests along its whole length. The terga of the 3'''^, 4''^ and 5"'^ somites are also partly separated 

 from their pleura by a longitudinal ridge or crest, but for the rest they are smooth, the posterior 

 elevation of the surface being little pronounced. The pleura of the i^' to 5"^ somite are smooth 

 and unarmed, the anterior and posterior margins rounded or obtuse. The outer angles 

 of the posterior margin of the 6''' somite are spiniform, sharp, and the lower margins of this 

 .somite show also an acute posterior extremity. Telson strongly tapering, with two pairs of 

 rather stout dorso-lateral spinules, long 0,11 mm., Y-i the length of the telson, the anterior 

 pair a little before the middle, the posterior about at the posterior third ; at either side of the 

 acute tip are three spines, those at the outer angle as long as the dorso-lateral, the two 

 others 3-times as long and no doubt of equal length. Inner uropod very narrow, a little longer 

 than the telson, the terminal spines excluded, outer uropod a little shorter than the telson, 

 without diaeresis. 



Eyes large, their greatest diameter in the male one-fourth, in the female almost one- 

 fifth the length of the carapace, rostrum excluded, armed above on the emargination of the 

 cornea with a conical tubercle ; cornea distinctly faceted, facets rather large, of a gray colour, while 

 in both specimens the left eye is marked on the outer side in the middle with a large black spot. 



The antennular peduncle reaches nearly along the proximal fourth of the scaphocerite, 

 2"'' and 3''<' joint very short, together shorter than 1^', lateral process lamelliform, rounded, 

 setiferous, a little shorter than basal article; upper (outer) flagellum in the male very broad, 

 0,35 mm., just half as broad as the anterior margin of the rostrum. 



