288 THE VOYAGE OF H.M.S. CHALLENGER. 



Haliporus curvirostris, Spence Bate (PI. XLII. fig. 1). 

 Haliporus curvirostris, Sp. B., loc. cit. 



Carapace subrnembranous, long-ovate, covered witb fine, short, hair-like spines, more 

 abundant near the cervical fissure. Rostrum one-sixth the length of the carapace, 

 anteriorly depressed and curved downwards, armed with ten or eleven small teeth on 

 the crest, five of which are on the rostrum and the rest anterior to the cervical 

 groove ; a small carina exists in the median line, which culminates in two or three small 

 teeth as it approaches the posterior margin. 



Pleon smooth. The first somite is long, broad, and has the coxal plate large and 

 well developed, slightly overriding the posterior margin of the carapace. Second somite 

 rather longer than the first ; the others subequal. Fifth and sixth terminating posteriorly 

 in a small, sharp, dorsal tooth. 



Ehipidura long, lateral plates narrow. 



Telson long, narrow, dorsally grooved, laterally depressed, fringed with hairs, and 

 armed with three small sharp teeth on the lateral margin. 



Ophthalmopoda small, about half the length of the rostrum ; ophthalmus not larger 

 than the diameter of the ophthalmopod. 



First pair of antennae with the peduncle more than twice the length of the rostrum. 



Second pair of gnathopoda extending considerably beyond the extremity of the 

 scaphocerite. 



Pereiopoda long, particularly the posterior pair. 



Length (female), 88 mm. (3"5 in.). 



Habitat.— Station 281, October 6, 1875; lat, 22° 21' S., long. 150° 17' W.; Pacific 

 Ocean, south of the Low Archipelago; depth, 2385 fathoms; bottom, red clay; bottom 

 temperature, 34° - 9. One specimen (damaged). Trawled. 



Station 285, October 14, 1875; lat. 32° 36' S., long. 137° 43' W. ; South Pacific 

 Ocean ; depth, 2375 fathoms ; bottom, red clay ; bottom temperature, 35°'0. One 

 specimen ; female. Trawled. 



This species may readily be distinguished from any of the others by the numerous 

 small points that cover the carapace, by the marked curvature of the rostrum, the apex 

 of which points downwards, and by the length and robustness of the posterior pair of 

 pereiopoda. 



The ophthalmi are not larger than the diameter of the stalk which supports them, which 

 is scarcely half the length of the first joint of the peduncle of the first pair of antennae, 

 and the ophthalmic tubercle is small but prominent. 



The peduncle of the first pair of antennae is considerably longer than the rostrum, 

 which equals the first joint, and carries a prosartema of a nodular and almost rudi- 

 mentary form supporting a tuft of hairs. In the more perfect specimen the flagella are 



