2 4 



CHHVLEROID FISHES AND THEIR DEVELOPMENT. 



according to corresponding numbers, that these were caused by the frontal organ, 

 for each shows a number of small punctures, usually 8 to 12, corresponding in 

 arrangement to the cusps of the frontal spine, as one may demonstrate by experi- 



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Figs. 7 to 1 1 . Region of dorsal fin in (emale specimens of Chimaera colliei, showing marks of frontal clasping organ of male. The 

 smaller numbers, i to 14, and (at the left) enlargements with corresponding numbers, show positions and details of scars made by frontal 

 clasping organ. 



ments with the spine itself. The majority of these scars occur, moreover, in the 

 position where they would be expected if the male assumed in cofrdo the same 

 position as the shark. With few exceptions they are situated in the region of the 



