ORDER CHILOGNATHA. 153 



1. Glomeridee W. (Onisciformes Latr.), having the body of 

 a crustaceous texture and of an oval-oblong form, without 



pencil-shaped appendages, and capable of being 

 contracted into a ball; the under side of the 

 body being concave. The number of legs is 

 thirty-two in the males, and thirty-four in the 

 females. This family comprises but a single ge- 

 nus, Glomeris Latreille, the species of which 

 are found under stones, especially in mountain- 

 ous and woody districts. This group is highly 

 interesting to the naturalist, from the remarkable 

 analogy which it presents to certain crusta- 

 ceous animals, to which the name of wood-lice has been 

 given. Indeed, so strong is the relationship, not only 

 in form, size, and general appearance, but also in habits, 

 that it is no wonder that, by the majority of British natu- 

 ralists, who have in general cared too little for more than 

 the outward appearance of things, the Glomeris marginatus, 

 belonging to the ametabolous order Chilognatha, should have 

 been regarded as a mere variety of the Armadillo vulgaris, 

 belonging to the crustaceous order Isopoda. I trust that 

 better times are dawning on natural history, as a science, in 

 its legitimate sense, in this country. For the purpose of 

 comparison I have represented the two animals above men- 

 tioned, from which it will be seen how close is the apparent 

 proximity between the two groups. (See p. 111.) 



2. lulidce W. (Anguiformes of Latreille), having the body 

 of a crustaceous texture, but of a long and narrow form, and 

 unprovided with pencil-shaped appendages. Here belong 

 the genera lulus and Craspedosoma, having the eyes distinct, 

 and Polydesmus, in which they are obsolete. (See PI. 1, lulus 

 terrestris.) 



3. Polyxenidce W. (Penicillata of Latreille), having the 

 body soft, oblong, and furnished behind with small pencil- 



