39 



them. The telson, that measures '/. the length of the abdomen, carries 2 sharp teeth on its 

 lateral margins, one at the end of the anterior calcareous part and one a little before it: 2 

 small acute teeth are placed abreast in the middle just behind the anterior margin and posterior 

 to them there is a row of 5 or 6 much smaller teeth on cither side. The lateral margin of 

 the calcareous part of the uropods ends also in a sharp spinulc and a few smaller ones exist on 

 the inner margin. On either side of the median carina the 2"'' — 5''^ terga bear a few^ acute 

 teeth, which are smaller than those in the middle and which are arranged as an inner oblique 

 row of 3 or 4 teeth and as an outer jjatch of some more, both groups separated by a shallow, 

 oblique groove. A few still smaller spinules exist on the posterior part of these terga near the 

 transverse groove and similar small teeth occur also on the 1"' tergum near the transverse 

 groove by which it is separated from the pleura. The pleura of the i-"' somite carry a few 

 small teeth just behind their rounded, anterior margin, one an their lateral margin and one at 

 the posterior angle. The pleura of the 2"'' — 6''' somites end in a pair of sharp spines, the 

 anterior of which is a little larger than the posterior; there are 2 small, acute teeth on the 

 anterior margin of the pleura of the 2"'' somite, but the anterior margin of the four following is 

 smooth and entire, while a very small, acute tooth exists on the posterior margin of the 

 2"'^ — 5"' pleura. There are on the outer surface of these pleura a few small teeth near the 

 anterior margin and one or two in the middle, of which the lower is larger than the other. 



The last 5 thoracic sterna bear an acute spine in the middle line, on the 5'"^ this spine 

 is slightly curved backward ; the raised lateral margins of these sterna are armed with an acute 

 spine posteriorly and in front of this spine one observes on the 2 posterior sterna still a much 

 smaller tooth; for the rest the sterna are smooth. 



The armature of the abdominal sterna fully agrees with Batk's description ; the 6''' has 

 2 spines in the middle of its anterior margin and 2 in the middle of the posterior, while one 

 observes moreover on either side a transverse row of 2 or 3 smaller spinules. 



The antennular peduncle is 15 mm. long, the longer flagellum 6 mm.; the i*" joint, 

 9 mm. long, is one and a half as long as the two following combined and the peduncle is 

 little shorter than the carapace, while peduncle and flagella, taken together, arc slightly longer 

 than it. The peduncle reaches by half its terminal joint beyond that of the outer antennae. 

 The llagella of the outer antennae are wanting; the joints of the peduncle are very spinose 

 both on the outer and the inner margin like also on the upper and the lower surface. Still 

 only the posterior half of the epistome is grooved in the middle line; there is an acute spine 

 directed forward and downward in the middle of its anterior margin and a much smaller spine 

 occurs near the lateral angles. 



The external maxillipeds extend by half their terminal joint beyond the anterior margin 

 of the epistome. 



The thoracic legs increase in length from the 1*' that are 18,5 mm. long, just as long 

 as the carapace, to those of the slender 5''' pair, which, measuring 41 mm., are a little more 

 than twice as long as the carapace and as long as the body without the telson. All the thoracic 

 legs are armed with a short spine at the distal end of the upper margin of their meropodites. 

 The last pair, though slightly longer and .slenderer than the 4''', resemble it as regards the 



