RAJU: THE GENUS MONOGNATHUS 



Figure 1.— A-C, metamorphic stages ofMonognathus sp.: A, 42 mm TL; B, 48 mm TL and G, its head; C, 42.2 mm TL and H, its head. D. 

 M. isaacsi and I, its head; E, M. ahlstromi; F, M.jesse. Am, adductor mandibulae; Dp, depressor; Et, ethmoid tooth; Eg, ethmoid gland; 

 Ey, eye; Gl, gills; Go, gill opening; Gn, gonad; In, intestine; Lr, liver; Of, olfactory organ; Pf, pectoral fin; Sp, suspensorium; St, stomach. 



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