56 



developed, presents a somewhat other form than in the fig. 7^ of Professor Alcock's quoted 

 paper. These three males from Stat. 47 are 85 — 90 mm. long. Their petasma, as is obvious 

 by comparing the figure, pretty well agrees with that published by the japanese author, (1. c. 

 PI. VII, Fig. 6), while the petasma presents a different form, as figured by Alcock. I suppose, 

 however, this difference may prove to be due to the young age of our specimens. For the 

 rest they fully agree with the detailed description given by that author. 



The adult female from Stat. 2 is 150 mm. long. The rostrum that reaches almost to 

 the tip of the antennular peduncle and that is directed somewhat obliquely upward, is armed 

 with 9 teeth, of which the i*' or epigastric tooth is more than twice as far distant from the 2""^ 

 as the 2"'^ from the 3''', which is situated above the orbital margin. Post-rostral crest continued 

 to the posterior margin of the carapace. Tomentum of carapace and abdomen well developed, 

 except on the smooth ridges etc. First to third abdominal somites bluntly carinate, the following 

 sharply. Sixth somite twice as long as the fifth, measured along the upper margin ; telson longer 

 than sixth somite, barely shorter than the inner uropod. 



The outer antennular flagellum, i mm. longer than the inner, measures 15,5 mm., i. e. 

 two-thirds the length (22 mm.) of the peduncle; it is one and a half as long as the two last joints 

 of the peduncle taken together. Antennal flagellum 300 mm. long, twice as long as the body. 



The external maxillipeds reach to the end of the antennal peduncle. 



The three anterior pereiopods carry a strong spine at the base and one observes moreover 

 a small acute tooth at the distal extremity of the ischium of the i^' pair; this tooth, described 

 by KiSHiNOUYE, was not observed by Alcock. The i^^ pair of legs reach to the end of the 

 antennal peduncle, those of the 3''^ extend with the fingers beyond the apex of the scales, 

 but those of the 5''^ pair do not yet quite reach it. 



Thelycum fully developed, the prominent and upstanding margins of the ear-like lobes 

 are conspicuously curved inward. 



The rostrum of the male specimens from Stat. 47 just reaches beyond the distal end 

 of the 2°<i antennular article and carries 8 or 9 teeth besides the epigastric tooth ; the post- 

 rostral carina already reaches to the posterior edge of the carapace and the blunt carinae on 

 the i^' — 3''^ somites are already traceable. The outer antennular flagellum measures two-thirds 

 the peduncle as in the adult. In one male, 90 mm. long, the 5"^ legs project with half the 

 dactyli beyond the apex of the scales, in another they reach as far as the terminal spine; the 

 subterminal lobule on the posterior margin of the ischium is distinctly developed, like also the 

 retrorse and introrse spine in front of the notch at the posterior end of the merus and the 

 10 — 12 fine denticulations in front of the tooth are quite conspicuous; they reach beyond the 

 middle of the merus. 



The female is 105 mm. long, the rostrum, just reaching beyond the 2°*^ antennular 

 article, is 9 -f- i dentate and the post-rostral crest reaches almost to the hinder edge of the 

 carapace. The i^' — 3"^ abdominal somites are, however, still smooth and rounded, presenting 

 no tracé at all of the blunt carinae. The outer flagellum (10 mm.) measures not yet two-thirds 

 the length (16,5 mm.) of the antennular peduncle. The lateral margins of the thelycum are 

 not yet upstanding and curved inward, different from the adult female from Stat. 2. 



S6 



