SPECIES OF PERIPATTJS. 575 



in longest diameter). (10) Uterine embryos of all ages. (11) Unpaired 

 part of vas deferens long. (12) Spermatophore elongated, without a 

 horny coat, but with a horny cap at one end. (13) Skin pigment brownish, 

 not stated to be affected by alcohol. (14) Legs with well -developed coxal 

 organs. (15) Crural glands in the male in the two pairs of legs preceding 

 the genital opening, without papillae. (16) Accessory glands of the male 

 open between the legs of the last pair by a common opening. In addition, 

 the ovaries are completely fused and contain one spacious cavity, a charac- 

 ter found in no other group of species. This group of species is specially 

 interesting in possessing a large yolked ovum, a most important character 

 and found elsewhere only in Austro-Peripatus. It is more clearly marked 

 off from other species than any of the groups. The species are P. Weldoni. 

 P. Horsti, P. Butleri, and P. sumatranus. 



Melano-Peripatus. New Britain (1 species, P. novae-britanniae). The 

 characters are : (1) Number of legs (22-24 pairs) is variable in the species. 

 (2) The outer jaw is without a minor tooth, and the inner jaw has no 

 diastema or saw. (3) Legs with 3 spinous pads. (4) Nephridial openings 

 of legs 4 and 5 on the proximal pad. (5) Feet with 3 distal papillae, one 

 of which is anterior, one dorsal, and one anterior. (6)* Genital opening 

 subterminal, behind the legs of the last pair. (7) Oviduct with a recep- 

 taculum seminis with 2 ducts, without a receptaculum ovorum. (8) Ovary 

 exogenous. (9)* Ova of medium size ('1 mm. in longest diameter) (with 

 little yolk). (10) Embryos of all ages in the same uterus. (11) Unpaired 

 part of vas deferens very short, almost obsolete. (12)* Spermatophores 

 absent. (13) Skin -pigment black, apparently not affected by spirit. 

 (14) Legs without well developed coxal organs. (15) Crural glands, 

 absent. (16)* Accessory glands of the male open medianly and dorsally 

 near the hind end. The interesting point about this species is that though 

 occurring so near to Australia, it differs absolutely from Austro-Peripatus 

 in the character of its ovum. 



Capo-Peripatus. Natal and Cape Colony. Seven species are known. 

 The characters are : (1) Number of legs (16-25 pairs) is variable when the 

 number of pregenital legs exceeds 19 pairs. (2) Outer jaw with one minor 

 tooth, inner jaw without diastema or saw. (3) Legs with 3 spinous pads. 

 (4) Xephridial openings of legs 4 and 5 on the proximal pad. (5) Feet 

 with 3 distal papillae, two anterior and one posterior, except in cinctipes 

 in which the anterior papilla is dorsal ; and except in cinctipes there are 

 2 papillae at the base of the feet (Fig. 336). (6) Genital opening between the 

 legs of the last pair, which show a tendency to reduction and are some- 

 times obsolete (P. capensis). (7)* Receptacula seminis and ovorum 

 absent except in cinctipes in which there is said to be a minute trace of 

 receptacula seminis. (8) Ovary exogenous. (9)* Ova comparatively 

 large and with but little yolk (-56 in greatest diameter in capensis, '4 mm. 

 in Balfouri, probably about '2 mm. in cinctipes). (10)* Uterine embryos 

 of nearly the same age ; they differ most in cinctipes, in which however 

 the difference is not very great. (11) Unpaired part of vas deferens short. 

 (12) Spermatophores small, oval, with a thin coat. (13) Skin-pigment 

 mainly blue, green, or black, not affected by spirit. (14) Coxal organs 

 variable ; usually not well developed ; in P. Sedgwicki and Moseleyi they are 

 moderately and in P. cinctipes well developed. (15) Crural glands pre- 

 sent in most legs of both sexes, except possibly in P. cinctipes. (16) The 

 accessory glands of the male open into the terminal part of the vas deferens, 

 except in P. cinctipes in which they open separately between the anus 



