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the abdomen appears finely punctate when examined under a magnifying-glass. Immediately 

 behind the subacute, supra-orbital teeth stands a much smaller, though more acute tooth and 

 another, of the same size, occurs somewhat more outward and a little farther backward. The 

 two last named teeth are just as far distant from one another as the corneae of the eye-stalks 

 when the eyes are directed laterally outward. The antero-lateral angles of the carapace are 

 very sharp, acuminate and slightly directed outward. Like in Piicrtihis angtdatus (Sp. Bate), 

 the lateral sides of the carapace are perpendicular and make distinct though obtuse ridges with 

 the upper surface; at the anterior extremity of these ridges, at the level of the limit between 

 the o-astric and the cardiac regions, one observes an acute tooth as large as those that stand 

 near the supra-orbital teeth. In front of the cervical groove the lateral borders of the carapace 

 are rounded ; the cervical groove is shallow. The gastric region carries a pair of two very 

 small, subacute or obtuse tubercles, which Ortmann does not mention and which are situated a 

 little nearer together than the supra-orbital teeth ; in front of them two still smaller, obtuse 

 prominences are often discernible. The cardiac region is distinctly carinate in the middle line, 

 the carina subacute; the intestinal region, however, is rounded. A shallow groove separates 

 the median regions of the carapace from the lateral. 



Abdominal terga rounded, making no distinct ridges with the pleura. On either side the 

 2°'^ — 5'^^ terga show a trace of a shallow, transverse groove, when examined under a magnifying- 

 glass ; the pleura of the i^'^ — 6* somites end in a sharp tooth that is directed backward, but 

 the much smaller pleura of the \^^ somite are obtuse. The straight, posterior margin of the 

 5th tergum bears a sharp spine at the angles. The elongate telson measures one-third the length 

 of the abdomen ; the calcified part, which is one and a half as broad as long, carries two pairs 

 of small spinules on its upper surface ; the spinules of the anterior pair are a little smaller and 

 a little more approximate than those of the posterior. The lateral margins end posteriorly in 

 a spine, a smaller one occurs somewhat more inward and a third still smaller spine is found 

 between both at the base of the outer. The outer margins of the calcified part of the uropods 

 terminate also in a spine that carries 2 or 3 spinules on its inner margin. 



The eye-peduncles extend laterally as far outward as the acute antero-lateral angles of 

 the carapace. Antennular tergum smooth, unarmed, though one observes anteriorly, just behind 

 the anterior margin, traces of 2 very small, acute tubercles, that are rather far 

 distant from one another; the antennular tergum is rather broad, a little broader than long 

 and appears sometimes slightly carinate in the middle line. The inner antennae are nearly as 

 long as the carapace and their flagella that are nearly of equal length, but the outer of w'hich 

 is thicker than the other, are as long as the peduncle; of the latter the 2"^ and the 3''^ joint 

 taken together are nearly as long as the i^'. 



External antennae 3-times as long as the body. The peduncle that reaches to the middle 

 of the antennular flagella, is smooth and armed with rather few spines. The i*' joint carries 

 only one spine at the distal end of its outer margin ; the 2"'-^ carries on the upper surface two 

 spines near the inner and two near the outer border, one also near the proximal articulation ; 

 the lower face is unarmed, except a small spine on the distal margin which articulates with 

 the 3''' joint. This joint, a little longer than the 2"^^, but less broad, bears 3 spines on the 



