61 



border of the carapace, giving .off, on the hepatic region, a branch that runs 

 obliquely towards the lowe r border of the carapace. 



The sixth abdominal somite is deeper, its tergum is more convex and is not 

 produced to a spine posteriorly. 



In the first pair of legs the meropodite is unarmed, and in the 2nd pair 

 there is only one spine on the posterior border of the meropodite. 



The 5th pair of legs though of the same form as those of P. sivado, and 

 though not reduced in length, are yet considerably shorter and stouter than the 

 3rd pair. 



It is a larger species, the carapace of an egg-laden female, measured in the 

 middle line, being 39 millim., and the abdomen 82 millim. 



Andaman Sea 265 and 405 fathoms: Bay of Bengal, 200-350 fathoms: 

 Arabian Sea 360 and 609-620 fathoms. 



-r, , -VT I960 ,m e ,-, • \ 3114 1168 1723 



• Ee g d - No - — ( T yP e of the species) : — : — : — . 



Subgenus Phyk, Wood-Mason. 



Phye, Wood-Masou, Ann. Mag. Nat. Hist., Feb. 1893, p. 164. 



Differs from Pasiphsea in having the tip of the telson forked. In all other 

 respects, including the number and arrangement of the gills, it agrees -with 

 Pasiphsea. 



30. Pasiphcea (Phi/C) alcocki, Wood-Mason. 



Parapasiphs-a alcocki, Wood-Mason, Ann. Mag. Nat. Hist., Feb. 1891, p. 196. 

 Phye alcocki, Wood-Masou, Ann. Mag. Nat. Hist., Feb. 1893, p. 16-1. 



Illustrations of the Zoology of the Investigator, Crustacea. Plate III. Fir,. 5, 4Nn Plite LZI 

 Fig. 6. 



Resembles P. unisjoinosa in the form of the carapace, and P. sivado in the 

 armature of the meropodites of the first two pairs of legs, but differs from the 

 latter species in the following characters : — 



The rostrum is not a spine, but a high compressed tooth the anterior edge 

 of which is vertical and sinuous : it is continued backwards, almost to the 

 posterior border of the carapace, as a sharp carina. 



As in P. lniispinosa a ridge, which is sinuous and oblique in its anterior and 

 straight and nearly horizontal in its posterior part, runs from the orbital sinus 

 nearly to the posterior border of the carapace, giving off an obliquely descending 

 branch on the hepatic region. 



