340 ZOOLOGY. 
Order 3. Linguatulina.—This group comprises remark- 
able worm-like forms, which are parasites. The young are 
mnite-like, the body spherical, with boring jaws, and two 
Fig. 308.—Milnesi tardigradum, X Fig. 309.—Pentastoma teenioides. 
120 times. J, mouth-parts; b, alimentary Natural size.—From Verrill. 
canal; ov, ovary.—After Doyere. 
Fig. 310.—Ivodes albipictustrom a partly 
domesticated moose. The tick natural 
size, gorged with blood, and its six-legged 
young, much enlarged. a, beak or man- 
dibles armed with teeth; 6, maxilla, and 
e, maxillary palpus; d, a foot with sucker Fig. 311.—Ixodes bovis. Natural size 
and claws, enlarged. and enlarged. 
