229 
Bartsch unterscheidet drei Unterarten : 
a. Vivipara zam boangensis subsp. tubayensis n., 1. c. 138 t. 11 fig. 16 
(cfr. t. 46 fig. 11). 
„Shell similar to V. zamboangensis, but sabglobose, with the vvhorls more infiated and 
with the secondary sculpture much more strongly developed. The six slender keels above 
the stronger peripheral one are of most equal strength and the spaces between 
them are occupied by spiral lirations, as in V. zamboangensis. The base also is more 
infiated than in V. zamboangensis and the umbilicus is completely closed. In color it is also 
entirely different, 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 contour, but is much more 
delicate. 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 
eye. The sutures are strongly impressed and the well rounded base is openly narrowly um- 
bilicated. — Anfr. 5 7 / 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. 
