68 PERCY SLADEN TRUST EXPEDITION 
The fifth pareeopods reach about to the apex of the scale; the dactylus is exceedingly 
small and is hidden in a dense tuft of setze. 
There are sharp carinz on all the abdominal somites, those of the last four 
terminating in long spines. The telson is about twice the length of the sixth somite 
and extends beyond the apices of the inner uropods. Dorsally it bears two carinze which 
are connected anteriorly and join again shortly before reaching the very narrow apex. 
There appear to have been two pairs of dorso-lateral spimules on the telson in its 
posterior third. 
The identity of this specimen with that described by Spence Bate from 2150 fms. in 
the neighbourhood of Celebes is, I believe, certain. J. brevirostris from the Atlantic 
coast of 8. America is synonymous with N. perlatus if it really differs from that form 
only in the trivial distinctions mentioned by Bate. 
EXPLANATION OF PLATE 7. 
Fig. 1. Sergestes challengeri, Hansen, anterior part in lateral view. 
Vig. 2. Sergestes gardineri, sp. nov., anterior part in lateral view. 
Hig. 3 F 7 ss anterior part im dorsal view. 
Fig. 4 - 5 ne petasma. 
Fig. 5 a A fe outer uropod. 
Fig. 6. Gennadas parvus, Bate, lobes of petasma seen from beneath. 
Fig. 7 ss 5 » thelycum. 
Fig. 8. Gennadas alcocki, Kemp, thelycum. 
Fig. 9. Gennadas sp., thelycum. 
Fig. 10. WNotostomus perlatus, Bate, lateral view. 
