TERRESTRIAL ISOPODA 01'' NATAL. 231 



setaceous lobe on the inner side. Maxillipedcs (fig. 6) with 

 broad basal plate ; terminal joint of the outer palp multi- 

 spinous, with single spine on the middle joint and two stout 

 ones on the inner border of the first joint ; the inner palp is 

 rounded terminally, and has three prominent spines. The 

 segments of the mesosome (fig. 7) are strongly arched, and 

 have two transverse rows of spines. The coxopodite of the 

 first segment forms a deep groove beneath the pleural plate 

 (fig. 8), into which the coxopodite of the second segment fits. 

 Mesosomatic appendages 2 to 8 (fig. 10) feebly developed, 

 sparsely setose. Metasomatic segments similar to those of 

 the mesosome, but smaller. Uropoda (fig. 12) short and 

 small, not extending beyond the telson ; basal plate with 

 prominent diagonal ridge, setose, thick, strongly raised, and 

 convex ; posterior margin obtusely rounded ; antero-dorsal 

 surface expanded and concave ; exopodite short, and situated 

 in a groove on the lower inner margin of the basal plate ; 

 endopodite small, setose, with terminal spine, articulating on 

 the anterior and inner border of the basal plate. Telson 

 (fig. 11) ovally expanded anteriorly, with posterior portion 

 with straight sides ; there are two short, broad, obtusely- 

 pointed spines at the posterior of the expanded region ; 

 terminal margin truncate, broader than long. 



Length (of lai'gest specimen) 4'5 mm. 



Colour (in alcohol) creamy-white, with numerous irregular, 

 dark sepia-brown markings. 



Habitat. — Umhlali, Winkle Spruit, Natal. (C. Akerman.) 



Type. — In the Natal Museum. 



The external spines, setse, and scales in this species are of 

 considerable interest, and would well repay further investi- 

 gation. In view of the small number of perfect specimens 

 so far obtained, I have not felt justified in making this 

 investigation beyond utilising the specimen dissected for the 

 appendages, etc. 



The spines on the cephalon are represented by thi*ee 

 distinct types (fig. 9, a-c), probably stages in the develop- 

 ment, a being the perfect spine, h the worn-out spine Avith 



