The Classification of Animals. igg 



Class 4. Pedipalpi. — These are large Arachnids (Fig. 92), 

 in form intermediate between a spider and a scorpion. They 

 have clawed chelicerse, like the last two groups, and breathe by 

 means of lung-sacs. 



Class 5. Solifuga. — The head in these animals is distinct 

 from the thorax, and the latter from the abdomen. They 

 breathe by trachese. The tropical Galeodes (Fig. 93) is an 

 example of this class. 



Fig. g-!,.— Galeodes aruuioides. (From same source.) 



Class 6. Araneina.—T\\is. class is that of the true spiders ; 

 they have an entirely unsegmented abdomen. The first pair 

 of appendages, the chelicerse, are clawed, and bear a poison- 

 gland ; they breathe by pulmonary sacs. 



Class 7. Phalangida.— i:\As class, that of the " Shepherd 

 Spiders," differs from the last in breathing by trachea, and that 

 the abdomen is not separated off from the thorax. 



Class 8. Acarina.—The mites, all of small size, have no 



