110 Annals of the South African Museiim. 



l)ostgen%tal segment are each provided with a pair of accessory glands, 

 tvhich open externally by means of 4 separate openings on the 

 ventral surface of the body. Several pairs of the legs in the middle 

 of the body provided in the male ivith enlarged criifal glands, lohich 

 open at the apex of a large retractile papilla on the ventral surface. 

 Spermatophor large, elongate. Feet with a posterior, a superior, 

 and an anterior papilla. Legs of the genital segment used for 

 walking. Small crural glands not known to occur. Genital 

 opening of $ formed mainly of a large transverse orifice ; embryos 

 in the uterus in very different stages of development. Spinous pads 

 of legs and the jaws as in Peripatopsis. South African. 



III. Peripatus. — Genital opening situated betioeen the legs of the 

 penultimate jjair, lohich are well developed. A postgenital pair of legs 

 provided loith nephridia is also present. Most of the legs ivith a well- 

 developed coxal organ. Genital organs of ? complex, ivith complicated 

 receptacula seminis and ovorum.'''- [In thefetu males tohich have been 

 examined there are no accessory glands in the genital segment, but a 

 pair is p)resent behind opening on each side of the anus, luhile crural 

 glands opening on large {retractile ?) papillce occur on one or more 

 pairs of the legs immediately preceding the genital segment, one or tivo 

 such papill(B occurring on each of these legs. The spermatophor 

 is large and elongate.~\ Legs with 3 to 5 spinous pads, those of 

 the 4th and 5th pair with the nephridial opening in the 3rd, 

 or between the 3rd and the 4th pads (Bouvier). Feet with 1 

 to 2 posterior and 2 (in P. sumatranus only 1) anterior papillae 

 (Bouvier). Embroys in the uterus in very different stages of 

 development. Outer jaw with small accessory tooth or teeth at 

 base of main tooth ; inner jaw with the series of smaller teeth 

 separated by an interval from the group formed by the large main 

 tooth and the small tooth or teeth immediately next to it. American, 

 African, and possibly East Indian, 



8. Synopsis of the hnoion African forms. 



A. Genital opening between last pair of legs, which are, however, sometimes 

 obsolete. 



A^ Legs without distinct coxal organs. (Feet with 1 posterior and 2 anterior 

 distal papillffi) Gen. Peripatopsis. 



a. Legs of the genital segment without paired claws (occasionally with 

 1 claw). 



* Bouvier mentions the occurrence of receptacula seminis in P. thoUoni, but 

 says nothing of receptacula ovoruni. 



