476 ADAM SEDGWICK. 



papillae on the skin. In the Caracas species, as already men- 

 tioned, these have comparatively narrow cylindrical bases, 

 and the diameter of the tops is often almost as great as that 

 of the basal portion. In the Demeraran specimens, on the other 

 hand, the lower portion of the papillae have the form of trun- 

 cated cones with very broad bases, while the tops are relatively, 

 and I think absolutely, much slenderer than in the Caracas 

 specimens. The papillae figured by Gaffron (No. 34, PI. VII, 

 and here reproduced fig. 27) resemble those of the Demerara 

 specimens, and will serve for comparison with the papillae of 

 the Caracas specimens shown on PI. XXXVIII, fig. 12. I 

 propose provisionally to regard these specimens as belonging 

 to a distinct species, and to call it P. demeraranus 1 with the 

 following characters. Neotropical P erip atus with twenty-seven 

 to thirty-one pairs of ambulatory legs and cylindrical primary 

 papilla. Locality Maccasseema, Demerara. 



Peripatus from Trinidad. 



Dr. J. v. Kennel (No. 31) found two distinct species of 

 Peripatus in Trinidad; one of these he calls P. Edwardsii 

 and the other P. torquatus. His description of both is unfor- 

 tunately extremely meagre. 



The species which he calls Edwardsii possesses twenty- 

 eight to thirty pairs of legs (No. 32). The generative opening 

 is between the legs of the penultimate pair, and the generative 

 organs present the characters of the Neotropical species. 



Dr. Kennel was kind enough to send me two of this species 

 in spirit, and I am able to supplement his description. 



1 Sclater (No. 46) gives the name im Thurmi to the specimens with thirty 

 pairs of legs, which he has observed. It is of course quite possible that the 

 specimens with thirty pairs may be specifically distinct from those with 

 twenty-seven and thirty-one pairs. This, however, as stated above, I do not 

 regard as probable. On account of this uncertainty, and also because of the 

 further uncertainty as to whether the Demeraran specimens are specifically 

 distinct from species already determined and named, I propose the provisional 

 name of Demeraranus to include all specimens from Demerara, whether the 

 number of legs be twenty-seven, thirty, or thirty -one pairs. 



