146 Annals of the South African Museum. 



The very short telson serves to distinguish this species from all the 

 others, not only in the genus but also in the family. 



GEN. PELTOCOXA Catta. 



1875. Peltocoxa Catta, Rev. Sci. Nat. vol. 4, p. 161. 



1893. (part) Delia Valle, F. u. Fl. Neapel. vol. 20, p. 647. 



1906. Stebbing, Das Tierreich, 21, pp. 159, 723. 



PELTOCOXA AUSTKALIS n. sp. 

 (Plate XXVI. Fig. 13.) 



Body smooth, firm and rather strongly indurated. Rostrum very 

 small. Antero-lateral angles of head rounded. Eves round oval. 



o 



Side-plates 1 and 2 very small, concealed by 3, 3 and 4 very large, 

 adjacent margins closely fitting, inferior margin of 5 concave, 6 and 

 7 small, ovoid, not hidden. First and second peraeon segments short, 

 together equal to 3rd, 2nd a trifle shorter than 1st. 



Pleon smooth, 4th segment longest, with a rather high dorsal crest 

 extending whole length of segment and rounded at fore and hind ends, 

 postero-iiiferior angles of segments 1-3 rounded. 



Telson boat-shaped, short, reaching only as far as apex of peduncle 

 of 3rd uropod. 



First antenna short, very stout, 1st a little longer than broad, equal 

 to 2nd and 3rd together, 2nd and 3rd broader than long, flagellum as 

 long as 2nd joint, 4-jointed, 1st joint very stout, with long sensory 

 filaments, 2nd-4th minute, with fine setules, accessory flagellum not 

 recognised with certainty. 



Second antenna a little longer than 1st, ultimate joint a little 

 shorter than penultimate, flagellum shorter than peduncle, 4-jointed, 

 tapering, 4th joint ending in a long fine seta. 



Upper lip subtriaugular with a large apical notch. 



Lower lip, lobes tapering to subacute apex, inner margin not 

 notched. 



Mandibles, cutting-edge and secondary cutting-edge finely denticu- 

 late, molar very large and well developed, palp apparently absent. 



First maxilla, inner plate with 1 setule in an apical indent, outer 

 plate with 10 (?) spines, palp 2-jointed, the joints subequal, apex with 

 4 setae. 



Second maxilla, both plates narrow and subequal, apex with 3 spine- 

 setae. 



Maxilliped, inner plate reaching to end of 1st joint of palp, apex 



