THE TEKRESTKIAL ISOPODA OF NATAL. 571 



Anteniiulfe short and robust, S-jointed, with few lateral 

 setae on terminal joint. Antennae (figs. 13 and 14) short and 

 slender, setaceoiis ; flagellnm 2-jointed, distal joint more than 

 twice the length of the proximal one, style conical with ter- 

 minal sette. First maxillse (fig*. ]5), outer lobe terminating 

 in four short curved spines and five smaller pointed ones; 

 inner lobe with a single setose spine. Second maxillae (fig. 16) 

 thin and plate-like, with inner setose lobe. The segments of 

 the mesosome are convex, the 1st Avith expanded pleural plates, 

 and anterior and posterior angles acutely pointed, remainder 

 almost truncate ; notch on the underside of the inner margin 

 of segment 1 very small, margin of the 2nd segment not 

 grooved (fig. 18). Maxillipedes (fig. 17) -with outer lobe 

 terminating in a multispinous process and three small spines; 

 the inner lobe has three curved tooth-like spines. Uropoda 

 (figs. 19 and 20) not extending beyond the telson, basal plate 

 thick, strongly raised and convex, posterior margin rounded, 

 antero-dorsal surface expanded and produced laterally as a 

 spine, setaceous ; exopodite long, extending almost to the 

 posterior margin of the basal plate, endopodite rather longer 

 and bi'oader, keeled dorsally and ventrally, setaceous. Telson 

 (fig. 21) rather more than twice as long as wide, lateral margins 

 almost parallel, expanded anterioi'ly, depressed and almost 

 smooth. 



Length 7 '5 mm. 



Colour (in alcohol) yellowish-brown, with two broken darker 

 lines in the mid-dorsal line, and similar lateral ones above the 

 pleural plates, remaining portions with irregular yellowish 

 markings. 



Habitat. — Pentrich, near Pietermaritzbnrg, Natal, Sep- 

 tember 14th, 1915. (C. Akerman.) 



Type, — In the Natal Museum. 



This handsome species stands out very conspicuously from 

 any others I know of. The feeble development of the notch 

 and groove on the inner margin of the underside of segments 

 1 and 2 of the mesosome is interesting ; in all other species I 



