A Monograph on the Species and Distribution 

 of the Genus Peripatus (G-uilding). 



By 



Adam Sedgwick, M. 4., F.R.S., 



Fellow of Trinity College, Cambridge. 



With Plates XXXIV to XL. 



Introduction. 



The editors of the posthumous memoir of Professor F. M. 

 Balfour on the anatomy and development of Peripatus 

 capensis stated, in a note at the end of the memoir, their inten- 

 tion of preparing a complete monograph of the known species 

 of Peripatus. This intention has at length been carried out, 

 and the present monograph is the result of a laborious exami- 

 nation of all the specimens of Peripatus to which it has been 

 possible to get access. 



To my great regret Professor Moseley has been obliged, by 

 his most unfortunate illness, to withdraw from active participa- 

 tion in the work ; and the whole responsibility for the state- 

 ments and descriptions falls upon me alone. But he has given 

 me much valuable assistance, and has made some substantial 

 contributions to the monograph. The most important of the 

 latter relate to Peripatus ?iovce-zealatidice. He examined this 

 species with great care, and the drawings from which figs. 16, 

 17 — 20, and 30 were copied, were executed under his 

 supervision. 



The material at my disposal has been as follows : 



VOL. XXVIII, PART 4. NEW SER. G G 



