46 CRUSTACEA 



4. Now disjoint the abdomen from the cephalothorax and 

 with a scalpel clean out the soft parts from the interior of both. 

 Put them together again with the median line above the line 

 drawn in the center of the board, placing a bridge of cork or 

 paper under the junction of the cephalothorax and the abdo- 

 men, to raise the crayfish to its natural curvature, and glue 

 them in place. 



