184 Rev. T. R. R. Stebbing on /n'w 



Fig. 3. PtUodidt/a Jlatjelhim, Nich., of tlic natural size. ?>ii. Transverao 

 st'ction of the same, enlarged. 3 h. I'ortion of the surface, 

 enhirped. 



Fig. 4. I^ilodicti/a (?) arctipora, Xich., a fmgiuent, of the natural size. 

 A a. rorlion of the same, enlarged. 4 i. A few cells of the 

 same, enlarged further. 



Fig. 5. Ptilodictya feiustrUifonnia, Xich., a fraguient near the base of 

 the frond, of the natural size. .T n. Transverse .section of the 

 same, enlarged. 5 b. Portion of the surface, showing one of 

 the non-ponferous areola;, enlarged. 



Fig. 0. Fenesielht nervata, Xii-h.^ a fragment, of the natural size. 

 a. Portion of the .«ame, enlarged. 



Fig. 7. Ceravmpora ohioemis, Nich., part of an incrnsting specimen, 

 greatly enlarged. 7 a. A few cells from a worn specimen of 

 the .<auie, greatly enlarged. 7 b. Portion of a young example 

 of the same, showing the radiating growth of the cells from a 

 central point, enlarged. 1 c k 7 d. Fragments of much-worn 

 specimens of the .same (?), showing numerous interstitial tuhuli, 

 enlarged. 



XXIIT. — On some neio exotic Sessile-eyed Crustaceans. 

 By the Rev. Thomas R. R. Stebbing, M.A. 



[Plate XV. A.] 



I. Of the Cnistaceans now to be described, tlie first is a 

 small Amphipod sent to me by H. J. Carter, E.sq., F.R.S., 

 who found three specimens of it in a sponge, a branched 

 Suberite, from the Antarctic sea, di-edged up by Sir J. Ross 

 in S. lat. about 77.^° and E. long. 175°, from a depth of 

 300 fathoms. 



Two of the specimens are about an eighth of an inch in 

 length, the third being very much smaller. Whether the 

 larger pair had attained their full size or not is open to 

 question. All are of a dark-brown colour — in that respect, 

 !&Ir. Carter tells me, resembling the sponge from which he 

 took them. All were closely coiled up, with the gnathopods 

 hidden and tail and antennae tucked under the body. This 

 j)0sture, coupled with the breadth of the pereion or thorax, 

 gave the creatures a subglobose a.spect, at the first glance not a 

 little resembling that of a folded Sphan-omid. In point of fact, 

 however, their affinities seem to be with the genus DexaminPy 

 Leach. The su])erior antenna have the first joint stout, the 

 second more slender and twice as long, the third not differing 

 from the following articulations of tlie fiagellum. In the 

 lower antenniB only two of the joints of the peduncle could 

 be made out di.stiiictly, bi.'ing probably the penultimate and 



