[53] DECAPODA FROM ALBATROSS DREDGINGS. 397 



aud mud, temperature 384°, represents a species closely allied to the 

 last though generically distinct from it, and perhaps belonging to Bate's 

 genus, as indicated above. The generic affinities of this species are so 

 interesting that I describe it, although the specimen is in bad condition 

 and wants the endopods of the second gnathopods and of all the pe- 

 rseopods. 



The form and areolation of the carapax are nearly as in the last 

 species, but the crest upon the rostrum is higher and apparently un- 

 armed. The eyes, antennulte, and antenna? are apparently nearly as in 

 the last species, though the badly mutilated antenna! scales appear to 

 be broader and the anterior margin ovate and not oblique. The man- 

 dibles and masillse are essentially as in the last species, although the 

 distal lobe of the protognath of the second maxilla is proportionately 

 broader. The maxilliped also agrees verj' closely with that of the last 

 species, except the penultimate segment of the endopod (Plate 10, Fig. 6) 

 is a little broader distally and the ultimate segment very short, scarcely 

 a tenth as long as the penultimate, and broader than long. 



The endopod of the first gnathopod (Fig. 7) is almost exactly as in 

 Amalopenceus elegans, the merus being expanded into a broad lamellar 

 plate, half as broad as long, and projecting distally in a thin and broadly 

 rounded lobe beyond the articulation of the carpus, so that when the 

 three short distal segments are flexed they are concealed by it. 



The number and arrangement of the branchise and epipods are exactly 

 as in the last species, but there are small rudimentary exopods at the 

 bases of all the peraeopods. 



The pleon is very nearly as in the last species in general form, but 

 there is a crest-like dorsal carina on the third and fourth somites, aud a 

 sharp carina on the fifth and sixth. The telson is about as long as the 

 sixth somite, of nearly the same form as in the last species, but more 

 distinctly sulcated above and armed at the tip with a short median 

 spiniform tooth and a spine either side at its base, and just above the 

 tip with two or three spines along each side. The pleopods are nearly 

 as in the female of the last species, but there is no conspicuous process 

 on the sternum of the first somite. 



Measurements in milUm^ters. 



Length from tip of rostrum to tip of telsou 74 



Length of carapax including rostrum 28 



Length of rostrum 5.0 



Length of autennal scale 14.7 



Breadth of antennal scale 5. 8 



Length of sixth somite of pleon 11-0 



Hight of sixth somite of pleon 5-4 



Length of telson 11-0 



Benthesicymus ? sp. indet. 



(Plate X, Figs. 3,4, 5.) 



A single mutilated specimen (7117), wanting the whole of the pleon 

 and the endopods of the fourth and fifth peraeopods represents still an- 



