Indian Deep-sea Dredging. 163 



in the collection of the Indian Museum in their slenderer form, 

 in the minuteness of tlie postfrontul spine, which is only about 

 as large as the apical half of that of the female, and in their 

 shorter abdominal pleura. In the female these are longer 

 and squarer, and those of opposite sides are abruptly bent 

 inwards near the lateral margins so as to overlap one another 

 ventrally, completely closing the subabdominal cavity at all 

 events when the abdomen is partially flexed, and entirely con- 

 cealing from view the four intermediate pairs of appendages, 

 which are laid forwards upon the sternal region, thus forming, 

 there is little doubt, an incubatory cavity for the eggs. In 

 our specimens of the male, which are preserved with the 

 abdomen and its appendages fully extended, the pleura are 

 not bent inwards, being kept straight by the extended limbs, 

 but at each end of some of them a short longitudinal crease 

 is distinctly to be made out, indicating that the male, in 

 common with the female, possesses the power of closing the 

 subabdominal cavity. 



The appendix masculina is armed at the extremity with 

 two curvilinear rows of slender and moderately curved spine- 

 like seta3, one row slightly in front of the other ; the front 

 row, consisting of six spines, commences about the middle of 

 the inner margin and extends to the inner apex of the part ; 

 the hinder row, consisting of four, commences opposite to the 

 interval between the third and fourth spines of the front row, 

 extending to the Sftme level. 



Total length, from anterior end of carapace to tip of telson, 

 48 miilim. ; of carapace, from middle of anterior to middle of 

 posterior margin, 15 miilim. ; of antennal scale 6"25 miilim. ; 

 of abdomen, from base to tip of telson, 32 miilim. ; of its 

 sixth tergum 7*75 miilim. ; of telson 5 miilim. ; breadth of 

 thorax across branchial regions 3*5 miilim. ; of abdomen 

 across hump 3 miilim. 



53. Pasiphae unisjiinosoj sp. n. 



rasiphai' unispinosa, W.-M., 111. Zool. ' Investigator," pt. i., 189i', C'liist. 

 pi. iii. fig. 7, $. 



Differs from P. sivado in the following points : — The body 

 is not quite so strongly compressed. The carapace is longi- 

 tudinally convex in the mid-dorsal line and is furnished on 

 each side with a blunt lateral carina, which commences just 

 behind the eye and extends downwards and backwards to the 

 hepatic region, whence, after giving off a branch obliquely 

 downwards and backwards towards the inferior margin, it is 



