228 
117. Vivipara zamboangensis Bartsch. 
Tat. 45. Fig. 10—13. 
Testa aoguste umbilicata, coniea, tenuis, saturate olivaceo-viridis; apex laevis, anfrac- 
tibus 1 l l 2 convexis. Anfractus sequentes leviter inliati, carinis tribus subaequidistantibus, 
infera majore suturali, cincti, inter carinas fere plani et lineolis spiralibus subundulatis nu- 
merosis cincti; ultiinus antice descendens, infra carinam periphericam lineis subtilibus spira- 
libus tantum sculptus, carinis nullis. Apertura parva, subcircularis, supra leviter angulata, 
faucibus coeruleo-albidis ; peristoma nigrum, continuum, acutum, margine externo ad carinas 
leviter angulato, columellari tenui, valde arcuato, leviter super Perforationen! rimaeformem 
reüexo; calio parietali crasso. — Operculum rufo-fuscum, lineis iucrementi numerosis, nucleo 
excentrico, depresso. — Bartsch angl. 
Alt 25,9, diam. 20,2, diain. apert. 13,1 : 11,5 mm. 
Vivipara zamboangensis Bartsch, in: Proc. U. St. Nat. Museum vol. 32 
no. 1518 p. 137 t. 11 fig. 19. 
„Shell conic, thin, dark olive green. Nepionic whorls l 1 /, well rounded, smootli. 
Succeeding turns somewhat inflated, marked between the sutures by three spiral 
keels, of which the basal one, which is a little stronger than the other two, marks 
the periphery. The two post-peripheral keels divide the space between the summit 
and the periphery of the whorls into three equal, almost flattened areas, which are 
marked by many very fine and somewhat wavy spiral lines, that lend the surface 
a silky luster. The summit of the whorls falls immediately below the peripheral 
keel in all but in the last turn ; in this it is deflected toward the base and a nar- 
row band becomes apparent between it and the peripheral keel. Base rather short, 
well arched, narrowly umbilicated, marked by numerous fine, wavy, spiral striations 
as on the spire. Aperture small, subcircular, black edged, bluish white within; 
outer lip thin, faintly angled at the keels, columella thin, strongly concave and so- 
mewhat reflec.ted over the slitlike umbilicus, parietal wall covered with a thick cal- 
lus, which renders the peristome practically continuous.“ — Bartsch. 
Aufenthalt bei Zamboanga auf Mindanao. Abbildung und Beschreibung nach 
Bartsch. 
Weder Möllendorff noch Jagor haben diese anscheinend für einen Teil von Min- 
danao charakteristische Form erhalten. Sie scheint ebenso zu variiren, wie die an- 
deren Lokalformen der Y. costata. 
