Two NEW SPECIES OF ONYCHOPHOEA. 479 



the results of a thoi'ough and complete study of a great 

 number of species, and embodied the classificatory results at 

 the close of his paper in a tabular form, from which the 

 following is taken (5). 



II. 



I. Peripatus . . • (1) Genus. 



Peripatoides . . (2) „ 



Opisthopatus . . (3) „ 



III. Peripatopsis . . (4) „ 



IV. Paraperipatus . . (5) ,, 



In the above classification the genus Peripatus includes 

 the species Tholloni and Sumatranus. In the present 

 paper the former of these two species is placed in a genus 

 by itself, and is called by the generic name Mesoperi- 

 patus; the latter, together with the Malayan species, con- 

 stitutes a new genus, to which the name Eoperipatus will 

 be given. Bouvier has shown that M. Tholloni is inter- 

 mediate in character between the Neotropical and the 

 African species, and that it is more closely related to the 

 former than to the latter. From the description given in the 

 present paper it will be seen that the Malay forms are more 

 nearly akin to the Neotropical genus than to any other, and 

 that the genus Mesoperipatus is intermediate between the 

 Malay and African species. By dividing the genus Peri- 

 patus, as constituted by Bouvier, into three genera, the 

 differences between the Malayan, African, and Neotropical 

 forms contained in it will be emphasised. Bouvier has 

 already united together the genera Peripatoides and 

 Opisthopatus, this indicating the belief that they are 

 closely related. In the same way the close relationship 

 existing between the genera Peripatus, Mesoperipatus, 

 and Eoperipatus may be indicated by placing them to- 

 gether in one sub-family. 



The following classification seems to be a fair expression 

 of our present knowledge both of the anatomy and develop- 

 ment of the Onychophora. It will undoubtedly be improved 

 upon as our knowledge of the class advances. 



