REPORT ON THE CRUSTACEA MACRURA. 



817 



Length, entire (male), 

 of carapace, 

 of rostrum, 

 of pleon, . 



of third somite of pleon, 

 of sixth somite of pleon, 

 of telson, 



100 mm. (3-9 in.). 

 25 

 6 

 75 

 11 

 15 

 15 



Habitat.— Station 174c, August 3, 1874; lat. 19° 7' 50" S., long. 178° 19' 35" E.; 

 off Kandavu, Fiji Islands; depth, 610 fathoms; bottom, coral mud; bottom temperature, 

 39°. One specimen, damaged. Trawled. 



The only specimen of this species is unfortunately mutilated, being deprived of all the 

 appendages excepting the smaller ones in relation to the mouth. 



The rostrum is horizontal on the upper surface, and armed with nine small articulating 

 spines, while the lower margin is furnished with a tooth near the apex, and a fringe of 

 hairs reaching from it to the base ; behind the armature on the dorsal surface the rostral 

 crest continues as a smooth carina to the cervical fossa, at the posterior margin of the 

 gastric region, on each side of which a lengthened oblique lateral protuberance is directed 

 towards the fronto-lateral anode. 



The ophthalmopoda extend to about half the length of the rostrum, and support an 

 ophthalmus that is tolerably large and round. 



The first pair of antennae has the s|ylocerite short, with a terminal sharp tooth ; the 

 third joint of the peduncle reaches to a level with the apex of the rostrum. 



The second pair of antennae has the scaphocerite reaching considerably beyond the 

 extremity of the rostrum, and terminating in a squarish extremity. 



The pleopoda are long and apparently strong, and exhibit the petasma and stylam- 

 blydes common to the males in this genus, without any specific feature. 



The telson is damaged. 



N ematocarcinus tenuirostris, n. sp. (PI. CXXXII. fig. 10). 



Rostrum one half the length of the carapace, projecting horizontally forwards, slender, 

 styliform, armed on the upper surface with seven points and on the under margin near 

 the apex with one small tooth. 



First pair of antennae having the peduncle one-third shorter than the rostrum, and 

 the flagella two or three times as long as the animal. Second pair of antennae having the 

 scaphocerite reaching considerably beyond the extremity of the rostrum, and four times 

 the length of the animal. 



O 



Second pair of gnathopoda reaching as far as the extremity of the rostrum. 

 All the other exposed appendages are wanting. 



(ZOOL. CHALL. ESP. —PART LIT. 1887.) 



Fff 103 



