674 



THE VOYAGE OF H.M.S. CHALLENGER. 



First pair of antennae biflagellate, short, and furnished with a sharp-pointed 

 stylocerite. 



Second pair of antennae long and slender, and furnished with a sharp-pointed 

 scaphocerite. 



Mandibles having the psalistoma distinct from the molar process, and furnished with 

 a biarticulate synaphipod. 



Second pair of gnathopoda long, slender, pediform, and furnished with a long 

 basecphysis. 



First pair of pereiopoda six-jointed and simple. Second pair feebly chelate, and 

 having the carpos biarticulate. 



Geographical Distribution. — Professor A. Milne-Edwards took his specimen of 

 Chlorotocus gracilipes during the expedition of the " Travailleur " on July 27, 1881, at a 

 depth of 332 to 370 metres, in the Gulf of Gascony. 



Its length was about 50 mm. 



Chlorotocus incertus, n. sp. (PI. CXVI. figs. 1, 2). 



Animal smooth. Carapace anteriorly produced to a slender rostrum, armed with 

 teeth above, extending as far posteriorly as the dorsal crest, and also on the under 

 surface. 



The ophthalmopoda are short and pyriform. 



The first pair of antennas is short. 



The second pair of antennae is long and slender. 



The mandible carries a psalistoma and a two-jointed synaphipod besides the molar 

 process. 



The first pair of pereiopoda is simple. The second is slender, chelate, and has the 

 carpos biarticulate. The three posterior pairs of pereiopoda are slender, and terminate in 

 a long dactylos. 



The telson is broad at the base and tapering. 



Length, entire, 



,, of carapace, 



„ of rostrum, 



,, of pleon, . 



„ of third somite of pleon, 



,, of sixth somite of pleon, 



„ of telson, . 



Habitat. — Station 142, December 18, 1873; lat 

 Bank, off the Cape of Good Hope; depth, 150 fat 

 temperature, 47°. One specimen. Dredged. 



39 mm. (L5 in.). 



13 „ 



19 „ 



26 „ 



5 „ 



3 „ 



5 „ 



35° 4' S., long. 18° 37' E.; Agulhas 

 ioms ; bottom, green sand ; bottom 



