NO. 1518. PHILIPPINE SNAILS OF GENUS VIVIPARA—BARTSCH. 139 



flo.sely 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 umbilicated. 



The type. Cat. No. lOSOYf), was collected by Maj. E. A. Mearns at 

 Davao. Mindiinao, Philippine Islands. It has five and seven-eighths 

 whorls and nrieasures: Altitude,^! mm.; greater diameter, 17.6 mm.; 

 lesser diameter, 11.1 mm. ; aperture, altitude (from th|^Dosterior angle 

 to the middle of the base), 12 mm.; diameter (at right angles to the 

 last, from the middle of the outer lip), 9.5 nmi. 



VIVIPARA ZAMBOANGENSIS SURIGENSIS, new subspecies. 

 Plate XI, lig. IS. 



Shell resembling V. z. davaaenxlx in outline, but polislied, periphery 

 obsoleteiy angulated. The shell is of light olive green color, with a 

 few narrow longitudinal brown bands at irregular intervals. Base 

 well rounded, narrowly umbilicated. Under high magnification the 

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

 wav}" lirations, Avhich are scarcely perceptible to the naked eye. 



The type, Cat. No. 192977, U.S.N.M., was collected by Maj. Edgar 

 A. Mearns in Baganga River, Surigao, Mindanao, Philippine Islands. 

 It has five whorls and measures: Altitude, 16.1: mm.; major diameter, 

 1.5.3 nun.; lesser diameter, 13.1 mm.; aperture, altitude (from the pos- 

 terior angle to the middle of the l)a.se), 10.1 mm.; diameter (at right 

 angles to the last, at the middle of the outer lip), S.5 mm. 



VIVIPARA MINDANENSIS, new species. 



Plate XI, tig. 11. 



Shell subturreted, light olive green. The early whorls of the type 

 are eroded, l)ut it contained nine nepionic shells, one of which will 

 serve for the description of the early turns. The largest nepionic 

 shell has three and one-halt" volutions, the first two of which are more 

 loosely coiled and more rounded than those that follow. They are all 

 marked by exceedingly fine spiral striations. The periphery of the 

 last whorl of the nepionic shell is strongly angulated, while the base 

 is rounded like the spaces between the sutures and narrowly umbili- 

 cated. The adult whorls are inflated, evenly rounded at the side, but 

 abruptly so near the summit, which renders this roundly tabulated. 

 The periphery of the last whorl is marked b}^ a moderately strong 

 keel, while the space between it and the summit is crossed by six 

 slender threads, which are not regularly spaced. In addition to these 

 threads there are man}- exceedingly fine interrupted wavy spiral lira- 

 tions between them. The summit of the whorls falls considerabh^ 

 below the peripheral keels and exposes this above the suture in all the 



