REPORT ON THE CRUSTACEA MACRURA. 



717 



The second pair of antennae has the flagellum broken off subequal with the peduncle 

 of the first pair, and carries a scaphocerite that is subequal with the same. 



The oral appendages have not been examined. 



All the pereiopoda are broken off excepting the posterior pair, which is short and 

 robust, and carries a long and slender basecphysis, which is also preserved attached to 

 the third pair. 



The pleopoda are biramose ; the sixth pair is longer than the telson, and has the outer 

 branch armed with a small tooth at the outer distal anode. 



Carieyphus turgidus, n. sp. (PI. CXXI. fig. 5). 



Carapace one-fourth the length of the animal, dorsally produced anteriorly to a short, 

 sharp, smooth rostrum. Third somite of the pleon posteriorly produced to a small hunch ; 

 sixth somite subequal with the two preceding. 



Telson half the length of the sixth somite. 



Ophthalmopod clavate, half the length of the carapace. 



Habitat. — January 9, 1875, China Sea, off Luzon ; surface. 



The carapace is scarcely one- fourth the length of the animal, and anteriorly projects 

 to a sharp-pointed rostrum that is scarcely one-third the length of the ophthalmopod ; it 

 is slightly elevated on the frontal crest, but not adorned with teeth, and over the cardiac 

 region there is a small papilla in the median line. 



The pleon has the anterior two somites subequal in length on the dorsal surface, but 

 laterally the second is much longer than the first. The third somite is dorsally as long 

 as the preceding two, and posteriorly projects to a small and angular hunch ; the lateral 

 margins are subequal in length with the dorsal but not parallel to it, the anterior portion 

 being deep and convex, and the posterior narrow, concave, and parallel with the dorsal 

 surface. The fourth somite articulates with the third at right angles, and is subequal in 

 length ; the fifth is shorter and narrower, and the sixth is long, slender, and subequal 

 with the preceding two. 



