THE ANATOMY AND DEVELOPMENT OF PERIPATUS NOVAE-BRITANNIAE. 39 



example illustrates the fatuity of adopting ordinal names simply on the ground of 

 priority rather than on that of efficiency. 



De Blainville's name was little more than a nomen nudum. It was H. Milne- 

 Edwards who discovered the divarication of the nerve-cords in 1842 1 . But Grube's 

 memoir on Peripatus, besides being the best work which had appeared on the subject 

 prior to Moseley's discovery of the tracheae, is intrinsically a work of abiding merit. 



Therefore, in my opinion, Grube's name, Onychophora, should take precedence of 

 all existing names for the Class to which Peripatus is regarded as belonging. 



In conclusion I have to acknowledge with gratitude the uniform kindness of Mr 

 Adam Sedgwick, F.R.S., in lending me specimens of P. novae-zealandiae, capensis, and 

 balfouri for comparison, and in giving me the benefit of his experience of Peripatus. 

 My thanks are also due to Mr J. P. Hill, B.Sc, for specimens of P. leuckarti. 



Cambridge, 



May 17, 1898. 



BIBLIOGRAPHY. 



1. Balfour, F. M. 1. On certain points in the anatomy of Peripatus capensis. Proc. 



Camb. Phil. Soc, vol. in., part 6. 



2. Balfour, F. M. 2. The anatomy and development of Peripatus capensis. Posthumous 



memoir, edited by H. N. Moseley and A. Sedgwick. Q. J. M. S., vol. 23, 1883. 



3. Dendy, A. 1. Description of Peripatus oviparus. Proc. Linn. Soc. N.S.W., vol. x., 1895, 



p. 195. This supersedes Dendy's previous papers in Proc. Roy. Soc. Victoria, and 

 elsewhere in 1892. 



4 Dendy, A. 2. Observations on a variety of P. novae-zealandiae with sixteen pairs of 

 legs. Ann. Mag. Nat. Hist. (6), vol. xiv., 1894, p. 401. 



5. Fletcher, J. J. On the specific identity of the Australian Peripatus, usually supposed 



to be P. leuckarti Saenger. Proc. Linn. Soc. N.S.W., vol. x., 1895, p. 172. 



6. Gaffron, Ed. Beitrage zur Anatomie und Histologie von Peripatus. Parts i. and ii. in 



Schneider's Zoologische Beitrage, vol. I., 1885, pp. 33 and 145. 



7. Grube, Ed. TJntersuchungen iiber den Bau von Peripatus edwardsii. Midler's Archiv 



f. Anat. u. Phys., 1853, p. 322. 



8. Horst, R. On a specimen of Peripatus Guild, from Sumatra. Notes from the Leyden 



Museum, vm., 1886, p. 37. 



9. Hubrecht, A. A. W. Die Phylogenese des Amnions und die Bedeutung des Tropho- 



blastes. Verh. Kon. Akad. van Wetenschappen, Amsterdam, Part iv., 1894. 



10. Hutton, F. W. On Peripatus novae-zealandiae. Ann. Mag. Nat. Hist. (4), vol. xvm., 



1876, p. 361. 



11. Kennel, J. Entwicklungsgeschichte von Peripatus edwardsii Blanch, und Peripatus tor- 



quatus n. sp. Theil I., Arbeiten a. d. zool.-zoot. Inst. Wurzburg, vn., p. 95, 1885. 

 Theil ii., Ibid., vm., 1888, p. 1. 



1 Milne-Edwards (quoted by Grube) suggested the name Pleuroneura. Guilding had suggested Polypoda. 



