PLATE 26. 
Trionyx incrassatus. 
Fig. 
1. Inside view of the carapace, wanting the nuchal plate, half nat. size. 
s1—s7. The first to the seventh neural plates, with the connate neural spines and 
arches. 
plı—pls. The eight costal plates of the right side. 
c1. The place of attachment of the outer end of the first dorsal rib. 
c2—9. The portions of the consecutive dorsal ribs that become connate with the 
costal plates. 
2. Transverse contour of the upper surface of the carapace. 
