356 ZOOLOGY. 



as seen in the soft clawed feet and short wrinkled segments. 

 It is certainly not a worm, but, on the whole, connects the 

 worms with the sucking Myriopods, and suggests that the 

 insects may have descended from forms somewhat like Peri- 

 patus. Peripatus iuliformis inhabits the West Indies, and 

 either P. Ediuardsii Blanchard, or an undescribed species 

 about four centimetres in length (with twenty-seven pairs 

 of legs), inhabits the Isthmus of Panama. The name 

 Malacopoda was proposed by De Blainville, who suggested 

 that Peripatus connected the Myriopods with the Annelids. 

 There is but a single genus, Peripatus. 



Sub-class 2 . Myriopoda. — The centipedes an d millepedes 

 are distinguished by their cylindrical body, the abdominal 

 segments being numerou.s and similar to the thoracic seg- 

 ments, all provided with a pair of feet. The head is free, 

 with a pair of antennse, mandibles, and usually two pairs of 

 maxillaa. The internal organization is simple, like that of 

 the larvEe of insects. Some Scolopendrw are said to be 

 viviparous. 



Order 1. CMlognatha. — To this grouji belong the mille- 

 pedes, Julus, etc. (Figs. 304-307). The first maxillee are 

 absent. The segments are round or flattened, and the feet 

 are inserted near together, the sternum being undeveloped. 

 In some forms (Fig. 304, Spirostrephon Copei Pack., from 

 Mammoth Cave) the body is hairy. They are all harmless. 

 The eggs are laid in large numbers an inch or two beneath 

 the surface of the earth. They undergo total segmentation, 

 and in a few days the larva (Fig. 305) hatches. At this time 

 it bears a resemblance to a Podura, having but three pairs 

 of feet, the third pair attached to the fourth thoracic seg- 

 ment. After a series of moults, new segments and new feet 

 appear, and thus these Myriopods undergo a distinct meta- 

 morphosis. The species feed on dead, sometimes fresh 

 leaves, and on fallen fruit. 



Order 2. Pauropoda.— The two orders of Myriopods are 

 connected by Pauropus, which by Lubbock is regarded as 

 the type of a distinct order {Pauropoda). Our only species, 

 Pauropus Lubbockii Pack. (Fig. 309), consists of six seg- 

 ments besides the head, and the young Pauropus has but 



