C AI.I.IOIMIDAK 



167 



large, pale. Pcraeon segments dorsally rounded; segment 7 with a very feeble medio- 

 dorsal denticle on posterior margin. All the side-plates serrulate on lower margin. Pleon 

 segments 1-3 carinate, the carina on segments 1 and 2 ending in a sharp tooth, on seg- 

 ment 3 rounded. Postero-inferior angle of pleon segment 3 rounded with a small tooth 



Fig. 100. Oradarca impnssicauda, n.sp. a. I'leon segments 1-3. 

 /;, c. Dorsal and lateral views of telson. 



and a notch above it. Telson triangular, laterally produced at base into a rounded lobe, 

 apex rounded, feebly notched, dorsal surface with two shallow impressions basally, and 

 a deeper concavity distally. 



Epistome and upper lip gibbous, subcarinate medially. 



Gnathopods i and 2 as in tridentata. 



Oradarea edentata, n.sp. (Figs. 96 d, 101). 



? Chevreux, 1913, p. 143 (part, Leptumphopus novae-zealandiae, mm Tlioms.). 

 Occurrence: St. 173. South Slictlands. Many inch ovig. 77 up to 6 mm. 



Description. Integument as in tridentata, but with the major sculpturing not 

 forming such prominent transverse lines on the pleon segments as in the preceding 

 species. Post-antennal angle of head quadrate, 

 slightly produced forwards. Eyes broadly 

 oval, reddish. Peraeon and pleon dorsally 

 rounded, without any teeth or carination. 

 Side-plate 1 scarcely widened distally. Lower 

 margins of side-plates very obscurely serru- 

 late. Postero-inferior angle of pleon segment 2 

 quadrate, with a very minute tooth, of seg- 

 ment 3 rounded with a small tooth or notch 

 at the junction of lower and hind margins. 

 Telson oblong, narrowing distally, apex- 

 truncate, with or without obscure crenula- 

 tions. It is narrower than in bidenlata, h - l ' l(: '> n segment 3. c. Telson. 

 and without the distinct triangular apex of 

 tridentata. 



Epistome and upper lip much less gibbous than in the other species. Antenna 1 with 

 i-jointed accessory flagellum. 



Fig. 101. Oradarea edentata, n.sp. a. Side-plate 1 

 with integumentary sculpture further enlarged. 



