layer of the ovarian wall and is in connection with the cpithelial 

 layei', which surrounds the cavity of the ovary. This string is 

 already present under the young, still unstalked eggs, which occur 

 in the wall of the ovary (fig. 3). 



It is important to note that there are a few egg stalks arising 

 from the inner wall of the ovary and protruding into its cavity. 

 I have found however only two examples of this phenomenon 

 (figg. 4 and 5). These stalks are very short and the eggs borne 

 by them still young. These eggs therefore are „endogenous". 



The stalked eggs vary rather much in size. They are elliptical 

 in form ; the appftrently ripe ones have a very thin membrane and 

 their largest diameter varies from 55 to 90 /-*. Thus they are 

 somewhat larger than the endogenous eggs of the American Peri- 

 imtus^ which have a diameter of 40 — 50 /^, but smaller than 

 the ova of the other species of Peripatopsis, of which the diameter 

 according to Bouvier reaches at least 125 [/,. Bouvier, however, does 

 not mention the size of the ovarian eggs of P. Sedgwichi., the 

 uterine eggs of which are rather small (125 //. at least), so that 

 it is quite possible that in this point there is no diflference be- 

 tween this species and P. Dewaali. Of exogenous produced eggs of Ony- 

 chophores only those of Paraperipatus ceramensis Muir and Ker- 

 shaw are said to be smaller (+50 y.) ^), whereas those of Para- 

 'peripatus novae-hritanniae Willey again are a little larger (±110 y.) ^). 



It is not known with certainty, in which manner the exogenous 

 formed eggs of the Onychophores reach the interior of the oviducts. 

 Sheldon suggests, that in P. capensis it takes place through the 

 interior of the stalk, which for that purpose should obtain a 

 cavity. „The only indication", she however adds, „of such a 

 process which I have observed is that in some cases the stalk 

 has a vacuolate structure, and is irregularly two cells thick. In 

 fact I have never found an ovum either in process of passing 

 into or in the ovary, but the next stages of ova are in the 



1) Mum andKEBSHAW, Pcripatas ceramensis, n. sp. Quart. Jrn. Mier. Sc, Vol. 53, 1909. 



2) Willey, The Aiiatomy and Development of Pcripatiis Novae-Britanuiae. Cani- 

 bridge, 189S. 



