Museums of Natural History 



197 



Fig. 190. The author is finishing the cast of the same shark in the museum 



laboratory. 



cut them from the body with scissors or hack saw. ( Do not cut 

 so close as to remove a piece of body skin; otherwise, fluids will 

 ooze out and prevent the plaster from setting in the area around 

 it.) Then, I spread and tack the fins on pieces of wood and 

 place them in a pan of 10 per cent Formalin so that they float, 

 fins down. After the fins have been preserved in position, a 



