170 



DISCOVERY REPORTS 



Peraeon and pleon without any carinae or processes. Side-plate i widened below, feebly 

 serrulate ; side-plates 5 and 6 more evenly bilobed than in cuspidatus or Stenopleustes 

 nodifer. Postero-inferior angle of pleon segment 3 quadrate, the hind margin nearly 

 straight, and obscurely crenulate. Telson not so strongly boat-shaped as in cuspidatus, 

 apex more deeply incised, each lobe with 3-4 denticles, with fine setules in the notches. 



Mouth-parts as in S. malmgreni (Sars, pi. cxxv, fig. 1) except that the molar agrees 

 with that of cuspidatus (supra) in being rather feeble and conical. 



Gnathopods 1 and 2 in general like those of cuspidatus, but 5th and 6th joints not so 

 elongate. Peraeopods 1-5 all have the denticle on the dactyl. Hind margin of 2nd 

 joints of peraeopods 3-5 serrate. 



Fig. 103. Austropleustes simplex, n.sp. a. Head. b. Side-plate 1 and gnathopod 1. c. Side-plate 4. 

 d. Pleon segment 3. e. Telson. /. Maxilliped, with 3rd and 4th palpal joints further enlarged. 



Uropod 3, peduncle apically produced as in cuspidatus, inner ramus twice as long as 

 outer, triquetral in cross-section, margins spinulose. 



Remarks. Although so unlike the preceding species in having no dorsal armature, 

 this species agrees with the former in the mouth-parts, uropod 3, and the dactyls of 

 peraeopods 3-5. 



Family PARAMPHITHOIDAE 



Stebhing, 1906, p. 320. 

 Barnard, 1930, p. 372. 



Genus Epimeria, Costa 

 Stebbing, 1906, p. 321. 

 Barnard, 191 6, p. 170; 1930, p. 372. 



