EXPLANATION OF PLATE XXXIII. 
All the figures on this plate are from untouched photographs of natural size. 
Fics. 1, 1a, 2.—Tvrionyx sulctfrons, sp. nov. 
1.—Skull of type-specimen as seen from above: la.—lLower 
jaw of the same specimen. 
2.—Young specimen preserved in spirit. 
Fics, 3, 34.—Gonatodes bireticulatus, sp. nov. 
3.—Type-specimen from above: 3a.—Same specimen from 
below. 
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