NEOTROPICAL SPECIES. 195 



der of this monograph will be devoted to a statement of all that 

 is known with regard to the specimens found in other localities. 



1. The original species found by Guilding (No. 1) in the 

 forests of the Island of St. Vincent in the Antilles, and called 

 by him P.juliformis, possessed thirty-three pairs of legs, and a 

 dark line down the centre of the back. The generative opening is 

 apparently immediately in front of the penultimate legs. The 

 animal was of a fair size, being three inches in length by three 

 lines in breadth. It is apparently similar in all essential 

 respects to other neotropical Peripatus, and I am inclined to 

 maintain for the present the species, and to define it as 

 follows : 



Peripatus juliformis (Guilding). 



Neotropical Peripatus from St. Vincent, with thirty-three 

 pairs of ambulatory legs. — This definition is exceedingly un- 

 satisfactory because it is based on the number of legs, which, 

 as I have stated, varies in all the species which have been 

 closely examined. 



2. The species described by Audouin and Milne-Edwards 

 (No. 2) possessed thirty pairs of ambulatory legs, and came 

 from Cayenne (on the banks of the River Approuague, three 

 leagues from its mouth). The specimens were found " unter 

 faulem, im Schlamme versunkenem Holze, an den Ufern des 

 Approuage im Brackwasser." 



The description is very imperfect, as may be judged from 

 the fact that the generative aperture is not even mentioned. 



The species was regarded by the authors as identical with 

 Guilding's P. juliformis, but subsequently Blanchard (No. 8) 

 gave it the name of P. Edwardsii. I propose to retain the 

 latter name and to regard it as belonging to the same species 

 which I have fully described above from Caracas. 



It must, however, be remembered that the characters of P. 

 Edwardsii, as given in this monograph (p. 184) are based on 

 the Caracas specimens ; and it may quite well happen that the 



P 



