322 NORMAN E. M'lXDOO. 



EXPLANATION OF MAP. 



Upper Dalton Cave. Sec. II., No. 37. 



"Cross bedding" in limestone. Sec. II., Nos. 46-47. 



"Old passages." Sec. II., Nos. 56-57. 



Obstruction past which boat cannot be taken. Sec. II., No. 63. 



End of exploration. Sec. II., No. 64. 



