239 
to the spiral lirations, visible to the unaided eye, there are many closely spaced, 
more or less interrupted, very fine, wavy lines which can be seen under tbe micros- 
cope. Base well rounded and narrowly umbilicated. 
Aufenthalt im Fluss Baganga bei Surigao auf Mindanao. 
126. Vivipara buluanensis Bartsch. 
Taf. 49 Fig. 11. 
Testa late conica, subturrita, tenuiuscula, nitida, viridi-fusca. Anfractus 6'/ 2 intiati, 
infra suturam valde impressam distincte planato-huinerosi , ultimus ad peripheriam obsolete 
angulatus, striis incrementi lineolisque contertis undulatis spiralibus obsolete decussatus, late 
et sat aperte umbilicatus. Apertura modice magna, ovata, intus fuscescenti alba; peristoma 
callo tenui semipellucido brevi continuum, basi leviter expansum et reflexum. Operculum 
rufo-aurantiacum, nucleo parum depresso excentrico. 
Alt. 30,8, diam. maj. 22,3, min. 28,8 mm. 
Vivipara buluanensis Bartsch, in: Pr. U. St. National Museum 1907 vol. 32 
no. 1518 p. 140 t. 11 fig. 15. 
„Shell thin, subturreted, broadly conic, light brown, shining. All the whorls 
inflated and well rounded, with a broad rounded shoulder at the summit. Sutures 
strongly impressed. Periphery of the last whorl with a mere indication of an angu- 
lation. Base short , well rounded , rather broadly openly umbilicated. The entire 
surface, both on the spire and on the base, marked by many moderately strong lines 
of growth, and many fine equally developed and subequally spaced wavy spiral lira- 
tions. The Crossing of these two elements lend the shell a finely reticulated sculp- 
ture. Aperture moderately large, oval, white with a brownish tinge within; outer 
lip thin; columella very slender, somewhat expanded at base and sligthly reflected; 
parietal wall covered whith a short, thin, semitransparent callus. Operculum reddish 
orange, with but slightly depressed eccentric nucleus and many lines of growth.“ — 
Aufenthalt im See von Buluan auf Mindanao. 
127. Vivipara buluanensis boholensis n. 
Taf. 49. Fig. 12. 13. 
Testa late et sat aperte umbilicata, late conica, subturrita, solidula, virescenti-fusca 
summo saturatiore, fusco-coerulescente. Spira conico turrita apice acutissimo, integro; sutura 
