150 THE GENUS PERIPATUS. 



the illustrations required and to assist in the puhlication of 

 the monograph^ the Government Grant Committee of the 

 Royal Society granted the sum of £50. Figs. 16, 17 — 20, and 

 30 were made at Oxford by Mr. "W. H. Hill, under Professor 

 Moseley's direction and supervision. The remainder of the 

 drawings, including that of the living animal of PI. XIV, 

 were made by Mr. E. Wilson, of the Cambridge Scientific 

 Instrument Company. My best thanks are due to these 

 gentlemen for the care and skill with which they have exe- 

 cuted their work. 



Finally, I have again to acknowledge my indebtedness to 

 Professor Jeffrey Bell for his assistance in preparing the 

 Bibliography. Several papers which had escaped my notice 

 were first pointed out to me by him. 



For an account of the general anatomy and characters of the 

 genus Peripatus, I must refer to the memoirs of Moseley 

 (No. 18), Balfour (No. 28), and GaflFron (Nos. 34, 35). In 

 this monograph only those features of a specific difi'erential 

 value are dwelt upon. I have, however, made a partial ex- 

 ception to this rule in the case of Capensis, the external 

 characters of which have been described at considerable 

 length. The reader will be able to gather from this descrip- 

 tion a sufficient knowledge of the general external features of 

 the genus to enable him to understand the short descriptions 

 of the other species. 



The chief result of my observations has been to establish a 

 definite series of characters which distinguish quite sharply all 

 the species found in one region of distribution from those found 

 in the others. Excluding the doubtful case of the Sumatran 

 species, Peripatus has been found in the Ethiopian region 

 (South Africa), the Australasian, and the Neotropical regions, 

 and in each of these regions the genus is represented by more 

 than one species. I have been able to establish a certain 

 number of new species, but on the whole I must confess to 

 failure in this respect. My failure chiefly relates to the species 

 from the Neotropical region, and is due to the insufficient 



