THE GEOLOGY OE OIBEALTAR. 541 



Prof. Ramsay, in reply, said that frost was a most exceptional 

 thing in Gibraltar, and that snow was absolutely unknown. He in- 

 dicated that some agent was necessary for transporting the blocks 

 from the foot of the steep slopes along the gentle slopes at angles of 

 2° or 3°. The caverns were like all other limestone caverns, and 

 had no necessary connexion with the faults. All the faults were 

 noted in the paper. Mr. Smith's supposed fault had no existence. 

 The TerebratulcB mentioned by Prof. Jones came from the Spanish 

 side, not from Gibraltar. With regard to the identification of the 

 ffliynchonella, he said that, having submitted it to Mr. Davidson, he 

 was content to accept that gentleman's determination. In reply to 

 Mr. Evans he said that he had no opportunity of examining the 

 soundings. 



