ATTSTBAIIAN MALAOOSTEACA. 279 



i&ib-Eamily Aemadillin-E. 

 Caudal appendages jinartly visible between the two last seg- 

 ments of the abdomen. \ 



Q-enus Aemad^thiditim, Brandt. 

 Base of the caudal appendages\hort, the external ramus broad, 

 terminal, the inner ramus small. 



482. Armadillidium subdentatum. *\ A.M. 



Armadillidiim subdentatum, Haswell, M E 



Eirst segment of the pereion with its pos^jero-lateral angle 

 produced and almost tooth-like. Postero-latefal^ngles of the 

 remaining segments very slightly produced. Termlaial segment 

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

 posteriorly; the posterior border slightly convex. Basa 

 of the caudal appendages broad proximally, narrowing 

 distal border concave, inclined obliquely backwards and inward 

 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 W in. 



Sydney; Tasmania. 



Family ONISOIB^l. 

 Body moderately convex and usually loosely articulated. 

 Segments of the abdomen distinct, terminal segment small. 

 Caudal appendages exserted, styliform. Mandibles not palpi- 

 gerous. Internal antennae very small. [Jf.] 



Sub-Family OurscTNiE. 

 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 antennas with 

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

 the two terminal joints constituting the flagellum. 



