Plate VIII. 



Fig. 56. The same. A few sections farther caudad through the caudal 

 portion of the fenestral plate. 



Fig. 57. Necturus maculosus. larva. The ligamentum squamoso-columel- 

 lare is just attaching to the ventral edge of the squamosum. 



Fig. 58. The same, a few sections farther caudad. The ramus jugularis 

 VII is shown passing over the ligament. 



Fig. 59. The same, still farther caudad through the base of the stilus 

 columellfe. Note the relations of artery, vein and nerve in this and the two 

 preceding figures. 



