Philadelphia, April 24, 1917. No. 42 



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ABSTRACT OF THE PROCEEDINGS OF THE 

 SECOND ANNUAL MEETING OF THE AMERI- 

 CAN SOCIETY OF ICHTHYOLOGISTS AND 

 HERPETOLOGISTS, held in the Lecture Hall of the 

 Academy of Natural Sciences of Philadelphia, March 

 8, 1917. 



THE FISHES OF THE LANG-CHAPIN CONGO 

 EXPEDITION. John T. Nichols. (No abstract.) 

 These results will be incorporated in Mr. Nichol's forth- 

 coming report to be published by the American Museum 

 of Natural History, New York. 



A RESTORATION OF THE CARBONIFEROUS 

 AMPHIBIAN ERYOPS. Dwight Franklin. (No 

 abstract.) 



SOME EXPERIENCES WITH SNAKES AND 

 TURTLES. J. Fletcher Street. (No abstract.) 



NOTES ON THE TAXONOMIC VALUE OF 

 DERMAL DENTICLES AND TEETH IN IDENTI- 

 FYING SHARKS. Lewis Radcliffe. 



Sharks represent one of the most interesting 

 groups in the field of ichthyology, but a very difficult 

 one for the average worker. For many of the species 

 it is almost impossible to find satisfactory descriptions, 

 or was so until very recently. One reason for this is 

 that we cannot transport a shark 10 to 50 feet in 

 length, weighing from 300 to 10,000 pounds or more, 

 with ease to our laboratories, and very often our field 

 notes do not suffice for identification purposes. Even 

 when it is possible to bring large specimens to the 

 laboratory, identification must be made at once and 

 the remains cast adrift, the element of large size pro- 

 hibiting the preserving of large numbers for compara- 



