44 ASTERIAS VULGARIS. 



sun to dry. It may be well to fasten them down in some way so that 

 they will not warp too much in the process of drying. Specimens 

 that are wanted for a study of the internal anatomy should be preserved 

 in two to four per cent formaldehyde. The fluid may be brought into 

 immediate contact with the internal organs by injecting it through a 

 slit in one of the arms. 



