26 PERIPATUS 



jjapillae, and the nephridial openings of the 4th and 5th legs are on the 3rd 

 pad ; and (2) the Caribbean species, viz. the remaining Neotropical species, 

 in which there are 3 j^apillae on the foot and the nephridial openings of 

 the 4th and 5th legs are between the 3rd and 4th pads. The Andean species 

 are P. eisenii Wh., P. tuberculatus Bouvier, P. lankesteri Bouv., P. quitensis 

 Schm., P. corradi Cam., P. cameranoi Bouv., and P. halzani Cam. 



Of the remaining species, which are the majority, may be mentioned, P. 

 edwardsii Blanch., P. jamaicensis Gr. and Cock., P. trinidadensis Sedgw., 

 P. torquatus Ken., P. imthurmi Scl. 



New Britain Peripatus. With 22 to 24 pairs of claw-bearing legs, 

 with three spinous pads on the legs, and nephridial openings of legs 4 and 5 

 (sometimes of 6 also) on the proximal pad ; feet with one primary papilla on 

 the anterior, one on the posterior side, and one on the dorsal side (median 

 or submedian) ; outer jaw with a minor tooth, inner jaw without diastema ; 

 crural glands absent ; well-developed coxal organs absent. Genital opening 

 subterminal, behind the last pair of legs ; oviduct with receptaculum seminis, 

 without receptaculum ovorum ; unpaired part of vas deferens very short ; 

 accessory glands two, opening medianly and dorsally. Ova small, "1 mm. in 

 diameter, with little yolk ; the embryos are j)rovided with large trophic 

 vesicles (Willey). Embryos in the uterus of very different ages and probably 

 born all the year round. 



But one species known, P. novae-britanniae Willey. 



Sumatran ^ Peripatus. Peripatus with 24 pairs of ambulatory legs, and 

 4 spinous pads on the legs. The primary papillae of the Neotropical character, 

 with conical bases. Generative opening between the legs of the penultimate 

 pair. Feet with only two papillae. Single species. P. sumatranus Sedgw. 



Peripatus from the Malay Peninsula. ^ With 23 to 25 pairs of claw- 

 bearing legs, 4 spinous pads on the legs, and nephridial openings of legs 4 

 and 5 in the middle of the proximal pad or on its proximal side ; feet with 2 

 j^rimary papillae, one anterior and one posterior ; outer jaw with 2, inner jaw 

 with 2 or 3 minor teeth at base of main tooth separated by a diastema from 

 the row of small teeth ; crural glands present in male only, in the two pairs 

 of legs preceding the generative oj^ening ; coxal organs present. Genital 

 opening between the ]3enultimate legs ; oviduct with receptacula seminis and 

 ovorum ; unpaired part of vas deferens long ; male accessory glands two, 

 opening medianly between the legs of the last pair. Ova large with much 

 yolk and thick membrane, like those of Australasian species ; embryos with 

 slit-like blastopore, and of very different ages in the same uterus, probably 

 born all the year round. The species are P. iveldoni Evans, P. horsti Evans, 

 and P. hutleri Evans. It will thus be seen that the Malay species while 

 resembling tlie Neotropical species in the generative organs, differ from these 

 in many features of the legs and feet, in the important characters furnished 

 by the size and structure of the ovum, and by the early development. 



^ The existence of this species is doubtful. The description of it was taken 

 from a singe specimen. The evidence that this specimen was found in Sumatra is 

 not conclusive. 



^ I am indebted to Mr. R. Evans and the Editors of the Quart. J. Micr. 

 Sci. for permission to see proofs of Mr. Evans' papers in vol. xliv. of that 

 journal. 



