10 AUSTRALASIAN ANTARCTIC EXPEDITION. 
EXPLANATION OF PLATES. 
Plate XIX. 
Rig. 1.—Diastylis Mawsoni, spn. Immature female, from the side. 
Fig. 2.—Diastylis Mawsoni, sp.n. Anterior portion of body from above. 
Fig. 3.—Diastylis Mawsoni, spn. Posterior somites of abdomen, with telson and 
uropod. 
Plate XX. 
Fig. 4.—Diastylis Helleri, Zimmer. Anterior portion of body from the side. A. Syntype 
from South Georgia. B. Specimen from Cape Royds. C. Specimen obtained by 
Australasian Expedition (the outline of the carapace slightly restored). 
NaTIONAL MUSEUM MELBOURNE 
