LIMULUS AN ARACHNID. 525 
Fic. 6.—The seventh, eighth, and ninth pairs of appendages of Scorpio 
(left) and Limulus (right). The posterior face of the appendages is 
shown. gp. Genital pore. s¢g. Parabranchial muscular stigmata 
(tendons of the thoraco-branchial muscles) of Limulus. eps. Epistig- 
matic sclerites of same. Drawn from specimens. 
