IOO 



MARKFTAr.LE BRITISH MARINE FISHES CHAP. 



FIG. 50. 



Fir. 51. 



FIG 52. 



/'.I/ 



50-54. The development of a buoyant marine fish-egg. 50. The fertilised 

 51. The same when the germ-skin has spread over half the yolk. 52. 

 The same when the germ-skin has nearly enveloped the yolk. 53. The same 

 when the embryo is advanced in development, and the tail has l>egun to grow 

 out. 54, The newly hatched larva. Yk, yolk; Ge, germ ; G.S, germ-skin : 

 N, nostril; Hd. head; Ht. heart; A, organ of bearing; E. eye; I, end 

 of intestine ; F M, fm-numbrane. 



