606 " THETIS " SCIENTIFIC RESULTS. 



Some slight differences between the male specimen obtained by 

 the " Thetis" and that taken in Bass Strait by the "Challenger" 

 require notice. The upper lip has a more strongly rounded mar- 

 gin. The spine-row of the mandible has only seven spines. The 

 second gnathopods have the sixth joint not at all widened distally 

 as represented in my figure of the " Challenger " specimen, 

 although that widening is not mentioned in the text. In the 

 third uropods the rami are as nearly as possible equal in length, 

 and the telson shows only two instead of five setiform spines at 

 each subapical corner. 



In the female the first gnathopods, though larger than the 

 second, are not very bulky. The sixth joint, a little longer than 

 the fifth but not broader, is narrowly oval, having the palm 

 defined from the hind margin by a palmar spine. In the second 

 gnathopods the sixth joint is slightly longer than the fifth, the 

 palm a little oblique, but much shorter than the hind margin, 

 with which it forms an angle. The specimen examined carried 

 nine large eggs in the marsupium. 



Localities. — Off Port Hacking, and off Wata Mooli, 54-59 

 fathoms. 



Genus PARAOROIDES, genMOv. 



First antennae with accessory flagellum minute, rudimentary. 

 Border of upper lip rounded, not emarginate. Principal lobes of 

 lower lip wide apart. Mandibular palp, third joint the longest, 

 slender, setose only at distal end. Gnathopods as in Lembos, but 

 only moderately setose. Third, fourth and fifth peraeopods with 

 second joint broadly expanded, finger short, curved, reverted. 

 Third uropods short, and, unlike other members of the family, 

 with only one ramus. 



The generic name refers to some points of agreement which 

 this genus shows with Aoroides, A. O. Walker. That genus, 

 however, is described as entirely devoid of an accessory flagellum, 

 and has biramous third uropods. The latter character belongs 

 likewise to Lembos, which in addition has the accessory flagellum 

 well developed. 



PARAOROIDES UNISTILUS, sp.nov. 

 (Plate liii.) 

 Station 28. 



The first segment of the peraeon is longer than the second, with 

 side-plates produced forward, but not acute. 



The eyes are small. In the first antennae the first joint is 

 longer and much stouter than the second, the third in the^^adult 



