Length of the male 8i mm., of the female 91 mm. This species in its outer appearance 

 closely resembles Halip. acqitalis. Integument thin, smooth, glabrous, and shining. Carapace, 

 rostrum included, about one-third the total length. Rostrum obliquely ascending both in the male 

 and in the female, straight, half as long or almost half as long as the rest of the carapace, reaching 

 to the far end of 2"'^ antennular article; in addition to the two epigastric teeth, the anterior 

 of which appears, as in Halip. aeqiialis^ a little larger than the posterior, the upper margin of 

 the rostrum bears in the largest male 6, in the other younger males 5 or 4 teeth, in the 

 females are also 4 or 5, in one single specimen of medium size 6 teeth; the 1**' tooth is situated 

 on the carapace immediately behind the frontal margin or just above it and the distances between 

 the rostral teeth become smaller towards the tip which is acute. The straight lower margin is 

 fringed with long hairs. Rostral crest not interrupted by the cervical groove, produced as a 

 distinct carina, which is, however, not at all prominent, to near a small tubercle, existing, as 

 in Halip. acqualis, just near the posterior margin of the carapace. As regards the grooves and 

 the position of the four spines on the sides the two species agree with one another. 



In its general form the abdomen fully resembles that of Halip. aeqiialis, but the terga 

 are carinate in a different manner. In the adult male from .Stat. 316, long 81 mm., the i"' 

 abdominal tergum shows a trace of a short carina in the middle, the 2"'^ and 3'<^ terga are 

 distinctly carinate tVom the transverse furrow near the anterior margin to the posterior, though 

 their carinae are not so sharp as those of the 4"' — 6'^ somites; in the largest female from the 

 same Station the carinae on the \^^ and 2"^^ terga are rather inconspicuous, but the carina of 

 the 3"' is well developed and also in younger individuals the carinae of the two first terga are 

 sometimes indistinct. It is only the crest of the 6''^ somite that ends in a small tooth. Si.xth 

 abdominal somite one and a half as long as the 5"' and a little more than one and a half as 

 long as high; in the female long 91 mm. from Stat. 316 the 6''^ somite is 10,6 mm. long 

 and 6,5 mm. high, whereas the 3"^ is 7,3 mm. long; in the largest male these numbers are, 

 in the same succession, 9,3 mm., 5,4 mm. and 6,3 mm. The telson which resembles that of 

 Halip. aequalis, reaches about as far backward as the inner uropod, usually a little shorter, 

 sometimes extending just beyond it; the outer uropod reaches with one-fifth of its length 

 beyond the apex of the inner. The telson is a little longer than the 6''^ somite and acuminate; 

 its upper surface is carinate in the median line from the pointed tip nearly to the middle. 



Eyes as in Halip. aeqjialis, hemispherical, black, their major diameter just twice as long- 

 as the width of the peduncle; a small, conical tubercle on the inner side of the peduncle. 



The two pairs of antennae seemingly not differ from those of Halip. aeqnalis. In adult 

 specimens the tapering, lower, antennular flagellum is not yet one and a half as long, but in 

 younger specimens a trifle more than one and' a half as long as the carapace without the 

 rostrum : so e. g. in the largest male the lower flagellum is 24 mm. long, the carapace without 

 the rostrum 17,5 mm., in younger males these numbers are respectively: 22, 13,75 o'' -i^ '3; 

 in the largest female, long 91 mm., they are 30 and 22; in younger females 28 and 20, 27 

 and 16,5, 23 and 13,25, 21 and 11,75. These numbers seem to show that this flagellum is 

 somewhat longer in the female than in the male, at least in the younger specimens. Ujiper 

 flagellum about 3-times as long as the lower, nearly as long as the whole body. 



34 



