51 (50) Extreme edge of frontal margin with shallow transverse groove (under magnification) 



Rhithropanopeus harrisii 



Figure 94. — Rhithropanopeus harrisii, frontal view of 

 body showing transversely grooved front. 



51 (50) Extreme edge of frontal margin not transversely grooved, each half presenting single 

 edge (under magnification) 



52 



52 (51) Major chela with a more or less conspicuous tooth at base of dactyl, tooth often of 



contrasting color 53 



Figure 95. — Xanthid major chela with 

 large basal tooth on dactyl. 



52 (51 ) Major chela with no tooth at base of dactyl, or with obsolescent tooth little if any 

 larger than adjacent teeth 



55 



53 (52) Third and fourth teeth of anterolateral border definitely pointed forward with outer 



borders curved 54 



53 (52) Third and fourth teeth of anterolateral border triangular and pointing outward or 



slightly forward, outer borders not conspicuously curved Hexapanopeus angustifrons 



Figure 96. — Hexapanopeus angustifrons, 

 carapace and eyes. 



33 



