ACANTHONOTOZOMATIDAE 



127 



Pariphimedia integricauda, Chevr. (Fig. 70). 



Chevreux, 1906, p. 39, figs. 21-23. 

 Chilton, 1912, p. 487. 



Occurrence: St. 179. Palmer Archipelago. 1^11-5 mm., 2 $$ 15 mm., 1 juv. 6-5 mm. 



Remarks. The lower margin of the rostrum is continued as a low median keel on to 

 the base of the epistome, rising at its upper end into a triangular pointed tooth. The 

 dorsal tooth on the 3rd pleon segment rises from a low keel. Side-plate 4 fits into a 

 groove near the lower margin of side-plate 5, its acute postero-inferior angle projects 

 somewhat laterally ; side-plate 6 is also grooved near the lower margin for the reception 

 of the base of the 4th peraeopod when this limb is pushed backwards. The telson is 

 apically notched. Mandibles without a trace of a secondary cutting-plate. Palp of 



Fig. 70. Pariphimedia integricauda, Chevr. a. General view. b. 2nd, 3rd and 

 rudimentary 4th joints of palp of maxilliped. c. Telson. 



maxilliped with a minute unguiform rudiment of a 4th joint, not extending to the apex 

 of the 3rd joint, and bearing a single long seta. 

 The colour as preserved is brownish-orange. 



Distribution. Palmer Archipelago, littoral; South Orkneys, littoral to 4 fathoms. 



Pariphimedia normani (Cunn.) (Fig. 71). 



Cunningham, 1871, p. 498, pi. lix, fig. 7. 

 Stebbing, 1906, p. 217; 1914, p. 359, pis. iv, v. 

 Schellenberg, 1931, p. 119. 



Occurrence: St. 53. Falklands. 2 $? 9-10 mm. from kelp 

 root. 



Remarks. Easily distinguished from the previous 

 species by the absence of the paired processes on pleon 

 segment 2 and the toothed keel on segment 3. 



The median keel from the base of the rostrum to Fig . ?I . p an p himedia normani (Cun n.). 

 the epistome is the same as in integricauda. Side- Side-plates 4-6. 



