REPORT ON THE AMPHIPODA. 1145 



Locality. — Station 135c, off Nightingale Island, Tristan da Cunha, October 17, 1873; 

 depth, 110 fathoms. Two specimens. 



Remarks. — The specific name refers to the place of capture. 



Genus Dryopoides, n. gen. 



Mandibles with dentate cutting edge and secondary plate, spine-row of several spines, 

 the third joint of the palp longer than the second. 



Lower Lip with the mandibular processes long and pointed. 



First Maxillze with the inner plate small, carrying a single seta. 



Second Maxillie having a fringe of setae near the inner margin of the inner plate. 



Upper Antennae. — The first two joints of the peduncle long, the third short ; a very 

 small secondary flagellum. 



Lower Antennse not longer than the upper; the fourth and fifth joints of the peduncle 

 elongate. 



Gnathopods subchelate, the First larger than the Second. 



The First and Second pairs of Peraeopods having the first and third joints a little 

 widened for gland-cells, and having an opening in the apex of the finger. 



The Third, Fourth, and Fifth pairs of Peraeopods with the first joint little dilated ; the 

 third pair very short, the fourth pair longer than the third, and the fifth than the fourth. 



Uropods with the rami equal in each pair ; the third pair with minute rami and 

 short broad peduncles that reach beyond the telson. 



Telson simple, almost circular. 



Side-plates not deep. 



Sixth segment of the Pleon dorsally evanescent. 



This genus is nearly related to Dryope, Spence Bate ; in that genus as in this the 

 upper antennse have a small secondary appendage ; the first gnathopod is larger than the 

 second ; the first joint in the last three pairs of peraeopods is not broadly expanded ; the 

 rami of the third uropods are minute ; the telson is undivided, approaching a circular 

 form ; on the other hand in Dryope the first and third joints of the first and second 

 peraeopods do not appear to be expanded for gland-cells as in Dryopoides, in all three 

 pairs the rami of the uropods are unequal, and the dorsal arch of the sixth pleon- 

 segment though very short is present. The genus Dryope was founded by Spence Bate 

 in 1862 (Brit. Mus. Catal. Amph. Crust., p. 276) to receive a species which Gosse had 

 described and figured in 1855 (Marine Zoology, p. 141, fig. 256) as Unciola irrorata, 

 Say ; to this Spence Bate added a supposed new species, Dryope crenatipalma. For the 

 original definition of Dryope, see Note on Spence Bate, 1862 (p. 336). The genus is also 

 defined in the British Sessile-eyed Crustacea, vol. i. p. 487, and by Gerstaecker, in Bronn's 



(ZOOL. CHALL. EXP. PART LXVIL 1888.) XxX 144 



