24 



Part first. 



Fig. 64. Thalassochelys corticatp, 

 1 /5 nat. size. p. 99. 



In front of tank 10 is a little open trough. Lying 

 on or half buried in the shingle is an Electric Ray (Torpedo, 

 fig. 65) from which shocks may be taken. The fingers 

 should be placed under the broad part of the body, the 

 thumb above, and the animal squeezed or otherwise ill- 

 treated. - - Frequently among the shingle are small white 

 pointed objects, about two inches long, looking not unlike 

 split sardines. These are Lancelots (Amphioxus , fig. 66), 

 the lowest Vertebrate. 



