Manchester Memoirs, Vol. I. (1905), No. 1. 7 



Summary. — It has been shown that the so-called 

 buccal tracheal pits of Ooperipatus oviparus, described by 

 Prof. Dendy, are really hollow chitinous jaw-levers ; the 

 striated muscle fibres which make up the muscles con- 

 trolling them, having been mistaken for tracheal tubes. 



In conclusion, I wish to thank Prof Dendy for his 

 kind assistance, and for supplying me with specimens of 

 P. balfoiiri. 



LITERATURE REFERRED TO. 



1. Balfour, F. M. "The Anatomy and Development of 



Peripatus capensis." Q./.M.S., n.s., vol. 23, pp. 213- 

 259> pl- 13-20, 1883. 



2. MosELEY, H. N. " The Structure and Development of 



Peripatus capensis." Phil. Trans.., vol. 164, pp. 757- 

 782, pi. 72-75, 1874. 



3. Dendy, A. " On the Oviparous Species of Onychophora." 



Q.J. M.S., N.S., vol. 45, pp. 363-416, pi. ig-22, 1902. 



4. HiCKSON, S. J. "Staining with Brazilin." Q.J. M.S., 



N.s., vol. 44, pp. 469-471, 190T. 



5. PuRCELL, F. "Note on the Development of the Lungs, 



Entapophyses, Tracheae, and Genital Ducts of Spiders." 

 Zool. Anz., vol. 18, pp. 396-400, 2 figs., 1895. 



6. KoRSCHELT, E., and K. Heider. " Embryology of Inverte- 



brates." Vol. 3. London, 1899. 



7. Simmons, O. L. " Development of the Lungs in Spiders." 



Amer. Joiirn. Sci. (3), vol. 48, pp. 1 19-129, pi. 8, 1894. 



8. Packard, A. S. "Text book of Entomology." London, 



1903. 



9. Sedgwick, A. "Monograph on the Species and Distribu- 



tion of the genus Peripattis." Q./.M.S., N.s., vol. 28, 

 PP- 431-493' Pl- 34- -10, 1888. 



