f37] DECAPODA FROM ALBATROSS DREDGINGS. 381 



Length of second peraeopod 26. 5 



Length of chela 6.2 



Breadth of chela 0.7 



Length of dactylue 1.3 



Length of third peraeopod 36 



Length of merus 10.8 



Length of carpus 4.3 



Length of propodus 11.0 



Length of dactylns 3.4 



Length of fourth peraeopod 37 



Length of propodus 12. 



Length of dactylus 3.3 



Length of fifth peraeopod 31 



Length of propodus 10.0 



Length of dactylus 0. 2 



Length of sixth somite of pleon 7.2 



Hight of sixth somite of pleon 4. 



Length of telsou 10+ 



Length of inner lamella of uropod 10.5 



Breadth of inner lamella of uropod 2. 6 



Length of outer lamella of uropod 12. 



Breadth of outer lamella of uropod 3. 9 



PASIPHAID-aJ. 



Pasiphae peinceps, sp. nov. 



(PlateV, Fig. 2.) 



This species, which is far larger than any of the genus heretofore 

 known, is unfortunately represented by a single specimen (5473) only. 



Female. — The dorsum of the carapax is rounded except for about a 

 third of the length anteriorly, where it rises into a carina, terminating 

 in a short, mucronate and obliquely upturned rostrum overhanging, but 

 projecting scarcely as far forward as the front itself, which is prominent 

 though rounded in outline as seen from above. The lower angle of the 

 orbit projects in a prominent but obtuse angle, about as far as the 

 front, and below this the anterior margin is armed with a small spine 

 directed obliquely outward over the base of the antenna. The eye-stalks 

 are short and stout, and bear the large swollen black eyes facing only 

 very slightly outward. The eyes as seen in front are nearly circular, but 

 slightly larger in the transverse diameter, which is about three-fourths 

 the length of the eye-stalk and eye. The antennal scale is about two- 

 fifths as long as the carapax, scarcely a third as broad as long, and 

 the outer edge arcuate and terminating in an acutely triangular lamel- 

 lar tooth. There is an acute spine on the peduncle of the antenna be- 

 neath the articulation of the scale as in P. tarda, with which species the 

 antennae, antennulae, and oral appendages agree in all essential par- 

 ticulars, except the tip of the antennal scale just described. 



The perseopods are very nearly as in P. tarda. The first pair are 

 smooth, naked, and unarmed, except on the prehensile edges of the digits, 

 which are about three-fourths as long as the body of the chela. Tlie 

 second pair are armed with a few small spines along the lower edge of 



