EXPLANATION OF PLATH XXVIE 
Ophtocephalus punctatus, Bloch. 
Fic. 17.—Egg floating in water. 
,, 18.—Enlarged view of an egg. 
,, 19.—Lateral view of embryo inside the egg-membrane. 
,, 20.—Dorsal view of embryo inside the egg-membrane. 
,, 21.—Larva just hatched from the egg. 
,, 22.—Larva5 mm.long. Note the first appearance of the 
mid-dorsal streak (0) with its two spindle-shaped en- 
largements. 
Ophiocephalus gachua, H. B. 
Fic. 23.—Larva 7 mm. long. 
B. = mid-dorsal band; B. V.=blood vessel ; C.= chromatophores ; Cir. = 
circulation in the yolk-sac; D.=ear: D.F.=dorsal fin; Bae ve ald. ieabe 
O.G.= oil globule; V. = egg-membrane; W.= water; Y. = yolk. 
