elevating the posterior end when digging thrusts the bottom. When turned over on back the tail is of great The head and abdomen act as two rudder pieces and the angle of the head in respect to the abdomen gives the required angle for easy entrance into the sand. Then it is pushed and digs away of the sand by the feet. Of course in water sand comes easily. When on the back it is wonderful to see how readily one has for the fiddler can be steering around and when in the sand the amount of power. Fiddler Crabs. Very slow, old, crawl side ways on tips toes. Some are misters the enlarged chelae, the smaller or female hands? animals are usually right handed but there are many left handed. In digging their holes the big chelae seems always to go down and may be for starting the hole, the other just roll the sand in balls and push it to the surface. After a while the inhabitant sifts at the top of the hole air clears by sifting the sand away from the feet. They crawl over one another without in the least demonstrating jealousy. Just now the body of the animals is a shiny black.