The regions of the carapace are defined by very regular grooves; the hexagonal cardiac 

 area is separated by a deep cervical groove from the mesogastric region ; the bulging gastric 

 region is divided into tvvo parts by a longitudinal line, and the anterior part is marked by 

 numerous small but sharp granules. The branchial regions are crossed by several furrows, as 

 shown in the figure ; these regions are somevvhat concave. 



The short antennae arise from the" outer wall of the open orbit, at the base of the 

 superior fork of the external orbital angle; the basal joint is short and thick, immovable and 

 fused with its surroundings, the second joint is free, slender, and about one and a half times 

 the length of the next joint; the flagellum consists of three joints, diminishing rapidly in size, 

 it does not reach as far forvvard as the antennulae, that are about 3 times the length of the 

 rostrum. The peduncle of these antennulae consists of three joints of about equal length; the 

 basal joint is by far the broadest, and the rostrum reaches to the middle of the second joint; 

 the flagellum is short and thick (cf. Stebbing, 1. c, 1 91 4, pi. 25, A. f. ai., as.). 



The external maxillipeds (like also the anterior part of the sternum, between the bases 

 of the chelipeds) are densely hairy, which renders it difhcult, to make out their exact shape. 

 They are somewhat converging anteriorly, leaving a triangular gap posteriorly; ischium and 

 merus are of equal length, but both are somewhat broader in my specimen than is shown in 

 Stebbing's figure (pi. 25 A. f. w.r/>. 3): the antero-internal angle of the ischium is more strongly 

 bulging Y ) and the base of the merus more narrowed than in the figure quoted ; the merus 

 itself is about as lonsf as broad at the distal end, which shows 110 tracé of an auricle, and the 

 carpus, that is broader than the next two joints, is inserted near the external angle of the 

 merus. I have not examined the other maxillipeds in my single specimen ; they are however 

 figured by Stebbing (f. mx.p. 2, mxp. 1). 



The abdomen of the cf does not occupy all the space between the bases of the pósterior 

 legs; it is bottle-shaped ; only the last 4 joints are free and not fused with the sternum and 

 of these the penultimate segment is the shortest, the other being of about equal length. The 

 tip of the abdomen occupies nearly the centre of the circular sternum and is separated by a 

 wide, hairy space from the pósterior margin of the buccal cavern. 



Stebbing (19 14, 1. c. p. 270) describes the chelipeds of the cf as much more swollen 

 than those of the Q; I have not had an opportunity to study these legs in the latter sex, 

 but in my cf specimen they are rather short and weak, about as long as the carapace; the 

 meropodite is granular on outer surface, fringed with long hairs along the edges and without 

 subdistal tooth at the upper border; the carpopodite and the palm are likewise granular at 

 upper and outer surface; the internal angle of the former is not at all prominent; the palm is 

 low, about as long as the fingers, fringed with long hairs along upper and lower border, smooth 

 but pitted at inner surface; the fingers are straight, not particularly compressed, longitudinally 

 grooved and of about the same height till quite near the curved and acute tip, the cutting 

 margins are scarcely serrated in my specimen, but, according to Stebbing, the movable finger 



1) In the figure of H. Milne-Edwards (1. c.) this angle is vepresented as acutely pronounced, which does not agree with 

 Stebbing's finds and mine. De Haan (Faun. Jap. pi. H) figures a very long merus, twice as long as the ischium: his specimen 

 unfortunately is not extant. 



7 



