2-29 

 Bartsch unterscheidet drei Unterarten : 



a. Vivipara zamboangensis subsp. tubayensis n., 1. c. 138 t. 11 fig. 16 

 (cfr. t. 46 fig. 11). 



„Shell similar to V. zamboangensis, but subglobose, with the whorls more inflated and 

 with the secondary sculpture rauch more strongly developed. The six slender keels above 

 the stronger peripheral one are of raost equal strength and the Spaces between 

 them are occupied by spiral liratious, as in V. zamboangensis. The base also is more 

 indated than in V. zamboangensis and the umbilicus is completely closed. In color it is also 

 entirely diiferent, being light brown or yellowish browu. The sculpture of the present form 

 bears the same relations to V. zamboangensis, that V. burroughiana bears to V. angu- 

 laris (= costata). 



Alt. 22,7, diam. 20,1 mm. 



Aufenthalt im Fluss Tubay bei Santiago auf Mindanao. 



b. Vivipara zamboangensis subsp. davaöensis n., 1. c. p. 138 t. 11 



fig. 17 (cfr. t. 45 fig. 12). 



This form resembles V. zamboangensis tubayensis in coatour, but is much more 

 dehcate. It is fiesh coloured. The periphery is marked by a weak liration, while the rest 

 of the surface is marked by many ill defined closely spaced fine wavy spiral lirations on the 

 spire and the base. A few of these lirations are a little stronger and visible to the unaided 

 €ye. The sutures are strongly impressed and the well rounded base is openly narrowly um- 

 bilicated. — Anfr. ö'/g. 



Alt. 21, diam 17,6 mm. 



Aufenthalt bei Davao auf Mindanao 



c. Vivipara zamboangensis subsp. surigensis n., 1. c. p. 139 t. 11 

 fig. 18 (cfr. t. 45 fig. 13). 



Shell resembling the subsp. davaöensis in outline, but polished, periphery obsoletely 

 angulated. The shell is of light olive green color, with a few narrow longitudinal bands at 

 irregulär intervals. Base well rounded, narrowly umbilicated. Under high magnification the 

 surface of the spire and base show many very fine, quite closely spaced, wavy lirations, 

 which are scarcely perceptible to the uaked eye. Anfr. 5. 



Alt. 16,4, diam. 15,3 mm. 



Aufenthalt im Fluss Banganga bei Surigao auf Mindanao. 



