5, HYDRASPIS. 
Fig. 60. 
221 
ROMINA pence AERO Ig 
Shell of Hydraspis hilarii. 
Synopsis of the Species. 
I. Skin of upper surface of head divided into 
A. Mental barbels large, widening dis- 
tally, club-shaped; plastron yellow 
several small shields. 
with large black spots .......... 1. hilari, p. 222. 
B. Mental barbels narrow. 
1. Carapace with three tuberculate 
ridges in the halfgrown ; plastron 
with symmetrical black markings. 2. tuberosa, p. 223. 
2. Carapace with a single keel. 
Mental barbels as long as the diameter of 
the eye, black at the base; head and neck 
with symmetrical black bands ; carapace 
pale brownish, vermiculated with black. . 
Mental barbels shorter than the diameter 
of the eye ; intergular shield shorter than 
its distance from the abdominals ...... 
3. geoffroyana, p. 223. 
4, gubba, p. 224. 
