AUSTEALIAN MALACOSTKACA. 279 



Sub-Family Aemadillin^:. 



Caudal appendages partly visible between the two last seg- 

 ments of the abdomen. 



G-enus Aemadillidium, Brandt. 

 Base of the caudal appendages short, the external ramus broad, 

 terminal, the inner ramus small. 



482. Armadillidium subdentatum. A.M. 



AnnadilUdium subdentatum, Haswell, M S. 



First segment of the pereion with its postero-lateral angle 

 produced and almost tooth-like. Postero-lateral angles of the 

 remaining segments very slightly produced. Terminal segment 

 of the abdomen as broad as long, the lateral borders converging 

 posteriorly ; the posterior border slightly convex. Basal joint 

 of the caudal appendages broad proximally, narrowing distally, 

 distal border concave, inclined obliquely backwards and inwards. 

 Outer ramus broader distally than proximally, the terminal 

 border straight, the inner and distal angle rounded. Inner 

 ramus becoming slightly enlarged towards the extremity, not 

 reaching quite to the extremity of the terminal segment. Colour 

 lead-colour. Length K in. 



Sydney ; Tasmania. 



Family ONISCID^. 



Body moderately convex and usually loosely articulated. 

 Segments of the abdomen distinct, terminal segment small. 

 Caudal appendages exserted, styliform. Mandibles not palpi- 

 gerous. Internal antenna? very small. [-3/".] 



Sub-Family ONisciNiE. 

 External antennae geniculate at the fifth joint. Base of the 

 caudal appendages very short, with two very unequal rami, of 

 which the longer is exserted externally, the other internal and 

 placed beneath the abdomen. 



Genus Poecellio, Latr. 

 Body oblong-oval, loosely articulated. External antenna? with 

 their base partly concealed by the front of the head, seven-jointed, 

 the two terminal joints constituting the flagellum. 



