60 



The 0th abdominal tergum, which is only about half as long again as the 

 5th, ends in a sharp median spine. Telson not forked, a good deal shorter than 

 the narrow endopodite of the caudal swimmeret, which again is shorter than the 

 exopodite. 



Eyes hardly wider than their stalks, decidedly oblique. 



The antennular peduncle reaches about two-thirds of the way along the 

 antennal scale, the basal joint is the longest, the middle joint the shortest : the 

 antennular scale does not quite reach the end of the basal joint : the outer 

 tfagellum, which is a good deal longer than the inner, is longer than the entire 

 body. The antennal scale is not quite half as long as the carapace, its outer 

 edge is thickened and ends acutely. 



The external maxillipeds are hardly stouter than the 3rd pair of legs, they 

 reach beyond the antennal scale by about half their terminal joint. 



The first two pairs of legs have a single spine at the far end of the posterior 

 border of the basipodite, and a series of spines along the same border of the 

 meropodite, and a large spine at the far end of the same border of the very short 

 carpus. The 1st pair reach beyond the antennal scale by half the length of the 

 hand, the hand forms nearly two-fifths of their total length, and the fingers are 

 shorter than the palm. The 2nd pair, which are the longest, are a little over 

 half the length of the body without the telson; their hand, in which the fingers 

 are quite as long as the palm, is also about two-fifths of their total length. 



The 3rd and 5th pair of legs are nearly as long as the carapace, but the 4th 

 pair are only half that length. In the 3rd pair the terminal joints are filiform : 

 in the 5th pair the terminal joint is short, oval, and furnished with very long 

 Betas. 



In an egg-laden female the length of the carapace, measured in the middle 

 line is 14 millim., of the abdomen 34 millim. 



Andaman Sea 200 fathoms : Bay of Bengal 200-350 fathoms. 



,, 1 AT 509-510 9278 



Resrd. Nos. — = — : -r-. 



o 7 9 



29. JPasiphcea unispinosa, Wood-Mason. 



Pasiph&a uniipinosa, Wood-Mason, Ann. ling. Nat. Hist., Feb. 1893, p. 163. 

 Illustrations of the Zoology of the Investigator, Crustacea, Plate III. Fig. 7. 



Differs from P. sivado in the following characters : — 



The post-frontal spine is stronger and is continued backwards, almost to the 

 posterior border of the carapace, as a distinct carina. The eyes are much 

 larger. 



A ridge, which is oblique and sinuous in the anterior and straight in the 

 posterior part of its course, runs from the orbital sinus nearly to the posterior 



