with the embryo of Pet'ipatus imtfmrmi Sclat., figurcd by Sclater ') 

 on his PI. XXIV, fig. 3, much less with the analogous stages of 

 P. capensis and Balfoiwi, described by Sedgwick ^). The diameter 

 of these yoiing embryos generally is somewhat less than that of 

 the iinfertilized eggs. 



Of the next stage, the oldest one which is situated in the 

 ovary, I saw only two specimens, lying close to each other. It 

 is a blastula with a thin, one cell thick wall ; the egg-membrane 

 has disappeared (fig. 10). The diameter of the blastula is 85 y. 

 and therefore not larger than that of some of the young eggs; 

 its wall, however, is somewhat folded and perhaps a little shrunk. 

 This stage agrees much with fig. 6 of Sclater. 



Embryos are found in both ovaries, although the left ovary 

 not only has less perforations in its wall, but also contains only 

 a little quantity of ripe sperma and bears fewer egg-stalks. 



Only in the uterus occur older embryos, which however are 

 very much more developed than the oldest ones in the ovary. 

 They are all at about the same stage of development and thus 

 in this point there is no agreement with P. Sedgivicki^ in which, 

 according to Bouvier, the uterine embryos of one female are different 

 in development. Another difference from P. Sedgwicki seems to 

 be, that the compartments of the uterus, each of which contains 

 but one egg, are strongly separated from each other by narrow 

 tubular divisions; this condition, however, perhaps varies with 

 the age of the embryos. 



The right uterus of my specimen contains nine eggs, the left one 

 probably a few more, but this number cannot be ascertained exactly, 

 in consequence of a damage of the forwardly directed convolution 

 of this uterus. 



The uterine embryos about agree in their stage of development 

 with fig. 36 of Balfour ^). As the longitudinal axis of all embryos 



1) On the Early Stages of the Development of a South American Species of Peri- 

 patus. Quart. Jrn. of Mier. Sc., Vol. 28, 1888. 



2) 1. c., p. 456 and PI. XXXI. 



3) The Anatomy and Development of Peripatus capensis. Quart. Jrn. of Mier. Sc, 

 Vol. 23. 1883 



