514 



ONYCHOPHORA MYRIAPODA. 



[Segmental organs or neplmclia, resembling those of Annelids, 

 are found one pair in each segment. They open externally at the 

 base of the legs and internally into the body cavity. The body cavity 

 is divided into four parts by three septa (1) into a dorsal section 

 containing the dorsal vessel, (2) a main central division containing 

 the alimentary canal, slime glands and generative organs ; and (3) 

 two lateral compartments, which are continued into the legs and con- 

 tain the salivary glands, segmental organs and ventral nerve cords.] 

 The animals live in damp places beneath decaying wood. [They 



are viviparous ; in Peripatus Ca- 

 pensis the period of gestation is 

 eleven or twelve months, the young 

 being born in April and May.] 



Fam. Peripatidae. Pt'i-ij>ntns Edtrarfl- 

 xii Blanch., P. cujienxin Gr. 



Class IV. MYRIAPODA.* 



Tracheata with separated head 

 and numerous fairly similar seg- 

 ments. They have one pair of an- 

 tennte, three pairs of jaws, and 

 numerous pairs of legs. 



The Myriapoda of all the Arthro- 

 poda present the greatest resem- 

 blance to the Annelids, in the serial 

 similarity of the segments, in the 

 possession of an elongated, some- 

 times cylindrical, sometimes flat- 

 tened body, and in the mode of 

 locomotion. In fact, they bear 

 much the same relation to the An- 

 nelids that the Snakes do to the 

 vermiform fishes amongst the Vertebrata. 



* J. F. Brandt, " Kecueil des memoires relatifs a 1'ordrc des Insectes Myria- 

 podes," St. Petersbourg, 1841. G. Newport, "On the organs of reproduction 

 and the development of the Myriapoda," Phil. Trans., 1841. Koch. ' System 

 der Myriapoden, Regensburg, 1847. M. Fabre, ' Rechercbes sur I'anatomie des 

 organs reproducteurs et sur developpment des Myriapodes," Ann. dcx. Sc. .\t/f., 

 IV. Ser., Tom. III. Fr. Meinert, ' Daumarks Chilognather," Naturh. Tlds- 

 skrift, :-{ R., Tom, V. ; and ' Scolopendrer og Lithobier," Ibid., Tom. V. 1868. 

 Latzel, " Die Myriopoden der osterreichisch-ungarischen Monarchic" I.. " Die 

 Chilopoden," Wien. 1880. Erich Haase, " Schlesiens Chilopoden," Breslau, 

 1880, 1881. 





FIG. 417. Hind end of a male Peri- 

 I in (us (after Moseley). T, Testes ; 

 Pr, prostate gland ; I'd, yasa defer- 

 entia; DC, ductus ejaculatorius ; JD, 

 rectum ; Vc, ventral nerve trunks. 



