1010 MR. R. J. ORTLEPP ON THE 



the other along such stages as Ph. ohtusissima (text-fig. 1 h), 

 Ph. abbreviata (text-fig. 1 c), Ph. paradoxa (text-fig. 1 d) to 

 Ph. cape7isis (text-fig. 1 e). 



Text-figure 1. 



/A 



' 'Am 



i Is 



Scliematic representation of the probable methods of Uterine evolution from the 

 didelphoid to the polydelphoid conditions. 



A = P/i. cl.mi.sa type; B = P/z. 'prtsputialis type ; C = Fh. tumefaciens type ; 



D = Fh. turgida type; h = I'll, ohtusissima type; c = Fh. abbreviata type ; 



cl = FJi. paradoxa type; e = Fh. capensis type. 



For the specific determination of the material examined, the 

 following characters were especially noted : — 



1. Number of uteri and their mode of origin. 



2. Number and arrangement of the male caudal papillse. 



3. Relative lengths and shape of the spicules. 



4. Number, shape, and size of the labial teeth. 



5. Outicular markings on the ventral surface of the male 



bursa. 



6. Position of the vulva. 



