87 
the two members closely fastened together at the centre, but 
the folds of the central portion allow the two limbs to be upon 
occasion drawn widely apart. Professor Smith has minutely 
described this apparatus. 
_ The retinaculum of the second pleopods has its apex sur- 
rounded by about 17 spinules of various sizes, and along the 
side lie three large spines. 
The inner ramus of the uropods is sub-equal in length to the 
telson, has its sides for the most part fringed with long plumose 
setee, and reaches beyond the apex of the telson, nearly to the 
spine on the outer margin of the other ramus. Beyond this 
tooth the outer ramus is produced for about two-sevenths of 
its total length, the fringing beginning at this point and con- 
tinuing round the not-very-broad apex far up the inner side. 
The red colour of this species fades away gradually in 
formalin, lasting longest on the setose or spinose armature of the 
mouth-organs. 
The specimen described measured 50mm. from apex of 
rostrum to apex of telson, the carapace being 15 mm. in length. 
Locality —The specimens were taken at a depth of 800 
fathoms, off Sandy Point. 
The specific name alludes to the vast number of luminous 
organs by which this species is in a manner glorified. 
Sergestes bisuleatus, Wood-Mason. 
Plate XXIVa. 
1891. Sergestes bisulcatus, Wood-Mason, Ann. Nat. Hist., Ser. 
6, Vol. VIL; pb. rgo:sorViala VULIs 253: 
1893. Sergestes phorcus, Faxon, Bull. Mus. Comp. Zodl., Vol. 
RXV = ps 2177, 
1893. Sergia (?) bisulcata, Ortmann, Decap. und Schizop. 
Plankton-Exp., p. 37. 
1895. Sergestes bisulcatus, Faxon, Mem. Mus. Comp. Zodl., Vol. 
XVIIL; p28, Pisses 
1896. Sergestes bisulcatus, Hansen, Proc. Zool. Soc., London, 
. 949. 
1898. Sergestes bisulcatus, Ortmann, in Bronn’s Thierreich, 
Vol. iV. Pl. mira tigee2: 
Faxon says, “I assign this species to S. bisulcatus, Wood- 
Mason, with some doubt, as the description of the latter species 
