498 
W. T. CALMAN. 
six segments present in Anaspides cannot be determined. 
From tlie fact that the exopodite is attached to the distal end 
of the second segment of the protopodite it may be inferred 
that this segment represents the basipodite alone, and not 
the coalesced basipodite and ischiopodite as it does in 
Koonunga and in the posterior legs of Anaspides. 
The appendages of the last thoracic somite are greatly 
Text-fig. 10. 
Text-fig. 9. 
Fig. 9— Bathynella natans, ? . Thoracic appendage of third pair. 
en. Endopodite. ep. Epipodites. ex. Exopodite. 
Fig. 10. — Bathynella natans, £ . Thoracic appendage of sixth pair. 
References as in Text-fig. 9. 
reduced in size, and differ considerably in structure in the 
two sexes. In the female the exopodite and endopodite are 
short, unsegmented stumps, and a single epipodite is present. 
In the male (Text-fig. 1) the exopodite is reduced to a papilla, 
there is no epipodite, and the coxopodite is produced in- 
ternally as a rounded prominence on which, or at any rate 
very near it, is the opening of the vas deferens, 
