[45] DECAPODA FROM ALBATROSS DREDGINGS. 389 



Kiglit of sixth somite of pleou 4.9 



Length of telson 12. 



Length of inner lamella of uropod 10. 7 



Breadth of inner lamella of uropod 2. 5 



Length of outer lamella of uropod .■ 11. 6 



Breadth of outer lamella of uropod 3. 3 



Parapasiphae compta, sp. nov. 



Female. — This species, like the last, represented by a single specimen, 

 agrees essentially with the two foregoing species in the form of all the 

 appendages and in the number and position of the branchiae, but is at 

 once distinguished by the form of the dorsal crest and rostrum, the 

 non-carinated pleon, and the form and armament of the extremity of 

 the telson. 



The carapax is more compressed than in either of the other species, 

 and on the posterior two-thirds is armed with a sharp, J3ut not high, 

 dorsal carina, which rises on the anterior j^art of the gastric region into 

 a high and very thin crest projecting forward in a laterally thin lamel- 

 lar rostrum with a broad and obtuse tip reaching considerably beyond 

 the middle of the eye-stalks. The eyes and eye-stalks are very nearly 

 as in P. sulcatifrons, except that the former are api^arently black in the 

 alcoholic specimen, and perhaps slightly more compressed vertically. 

 The antennal scale is about three-eighths as long as the carapax, nearly 

 four times as long as broad, and terminates in a triangwlar tooth in- 

 stead of a spine. 



The second gnathoi)ods, though only about as long as the carai)ax, 

 reach considerably by the tips of the antennal scales. The first perseo- 

 pods are a little longer, and their chelse more slender than in either of 

 the other species : the merus is a little longer than the antennal scale, 

 and armed with a few teeth along the lower edge ; the distal angle of 

 the upper edge of the carpus is somewhat produced and acute; and the 

 chela is more than half as long as the carapax, nearly three-eighths 

 longer than the antennal scale, with the digits nearly as long as the 

 body of the chela. The second perseopods are about a sixth longer 

 than the first; the basis, ischium, and merus are armed witha very few 

 spines along their lower edges, and the merus is about as long as the 

 merus and carpus in the first pair ; the chela is about a fourth longer 

 than in the first pair, and the digits about as long as the base of the 

 chela. 



None of the somites of the pleon are dorsally carinated or have the 

 posterior margins produced. The sixth somite is scarcely three-fourths 

 as long as the antennal scale and proportionately a little higher than in 

 P. sulcatifrons. The telson is half as long as the carapax, fully three- 

 fourths longer than the sixth somite, dorsally sulcated, tapers regu- 

 larly to where it is very narrow near the tip, and then suddenly expands 

 laterally, and terminates in an ovately rounded extremity, armed with 

 about eighteen slender spines, of which the sublateral and median are 



