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The Electric Organ of the Skate, [Apr. 27, 



figures. Fig. 1 represents a cell from the electric centre of the Skate 

 (a R. batis two feet in length) ; fig. 2 a cell from the electric centre 

 of a well- grown Gymnotus ; and fig. 3 a cell from the electric lobe of a 

 large Torpedo. All three cells are camera drawings, and the same 

 lenses were used in each case — objective D and ocular 2, Zeiss. It will 

 be noted that, though the cell from the Skate is much smaller than 

 the Torpedo cell, it is decidedly larger than the one from Gymnotus. 



In sections of the Skate's cord on a level with the electric organ, 

 small, as well as large, cells are usually visible in the anterior horn. 

 The small cells are in connexion with the fibres which supply the un- 

 transformed caudal muscles. They agree exactly with the cells in 

 the anterior horn throughout the entire length of the spinal cord 

 lying in front of the electric organ region. One of these unenlarged 



