LETTERmG ADOPTED IN ALL THE EIGUEES. 



EXPLANATION OF PLATE LII. 

 Eigs. 46 to 52. 



[The pigment, except when otherwise specijied, is shown as by reflected light.'\ 



Figure. 



46. Newly-hatclied larva of Species II. Solea liitea. (?) Ventral view. 



47. Larva of the same, about one day old. Profile view. 



48. Larva of the same, two days old. 



49. Larva of the same, four days old (by transmitted light). 



50. Larva of the same, about six or seven days old (by transmitted light). 



51. Anterior region of larva about six days old, more highly magnified. 



52. Early post larval stage of the same, eight or nine days old. 



[12] 



