CHAPTER VI. 



CLASS II. ONYCHOPHORA.* 



Tracheates with a dermomuscular body-wall, paired segmental 

 nephridia, and with numerous and similar pedigerous segments. 

 The head is not marked off from the body and bears one pair of 

 antennae, one pair of jaws and one pair of oral papillae. The 

 tracheal stigmata are diffusely scattered and there are no malpighian 

 tubes. Muscular fibres (excepting those of the jaws) unstriated. 



* Balfour, F. M., The Anatomy and Development of P. capensis, 

 Posthumous Memoir, edited by H. N. Moseley and A. Sedgwick, Quart. 

 J. Mic. Sci. xxiii, 1883. Bouvier, E. L., Monographic des Onychophores, 

 Paris, 1907 (Ann. des Sci. Nat. (9), 2 and 5). Dendy, A., On the Oviparous 

 Species of Onychophora, Q.J.M.S. xlv, 1902, p. 362. Evans, R., On 

 Onychophora from the Siamese Malay States, Q.J.M.S. xliv, 1901, 

 p. 473, and On the Development of Eoperipatus, ibid, xlv, 1901, p. 1. 

 Fletcher, J. J., On the Specific Identity of the Australian Peripatus, 

 usually supposed to be P. Leuckarti, Saenger, Proc. Linn. Soc. New South 

 Wales, x, 1895, p. 172. Gaffron, E., Beitrage z. Anat. u. Physiol. v. 

 Peripatus, Th. 1 and 2, Zool. Beitrage (Schneider), 1, pp. 33, 145. Guilding, 

 L., Mollusca caribbceana : an account of a new genus of Mollusca, Zool. 

 Journal, ii, 1826, p. 443, pi. 14 ; reprinted in Isis, xxi, 1828, p. 158, pi. ii. 

 Moseley, H. N., On the Structure and Development of Peripatus capensis, 

 Phil. Trans., 1874. Pocock, R. J., Contributions to our knowledge of the 

 Arthropod Fauna of the West Indies, Pt. 2, Malacopoda, &c., Journ. Linn. 

 Soc. xxiv. p. 518. Purcell, W. F., On the South African Species of Peri- 

 patus, etc., Annals of the South African Museum, i, 1898-99, p. 331, and 

 Anatomy of Opisthopatus cinctipes, ibid, ii, ]900. Sclater, W. L., On the 

 early Stages of the Development of a South American Species of Peripatus, 

 Quart. J. of Mic. Sci. xxviii, 1888, pp. 343-361. Sedgwick, A., A Mono- 

 graph of the Development of Peripatus capensis (originally published in 

 various papers in the Quart. J. Mic. Sci. 1885-88) ; Studies from the 

 Morphological Lab. of the University of Cambridge, iv, 1889, pp. 1-146 ; 

 A Monograph of the Species and Distribution of the Genus Peripatus, 

 Guilding, Quart. J. Mic. Sci. xxviii. 1888, pp. 431-494. Sheldon, L., 

 On the Development of Peripatus novce zealandia;, Pts. 1 and 2, Quart. 

 J. Mic. Sci. xxviii and xxix, 1888 and 1889. The memoirs quoted by 

 Sclater, Sedgwick and Sheldon, are all reprinted in vol. iv of the Studies 

 from the Morphological Lab. of the University of Cambridge, vol. iv, 1889. 

 Cambridge University Press. Steel, T., Observations on Peripatus, Proc. 

 Linn. Soc. New South Wales, 1896, p. 94. Willey. A., The Anatomy and 

 Development of P. novce britanniw, Zoological Results, Pt. 1, 1898, pp. 1-52, 

 Cambridge. Sedgwick, On the Distribution and Classification of the 

 Onychophora, Q.J.M.S. 1908. 



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