226 



appears at the periphery and the other between it aud the summit. The space bet- 

 ween the peripheral keel and tlie next one is a little narrower than the space bet- 

 ween the median and posterior keel, while the space between the summit and the 

 posterior keel is considerably wider still. The space between the summit and the 

 posterior keel is moderately rounded and forms the Shoulder of the whorl. The 

 Spaces between the other keels are flattened. The greatest convexity of the whorls 

 is marked by the median keel. Periphery of the last whorl angulated. Base mo- 

 derately long, strongly arched. The entire surface of the spire and base is marked 

 by rather strongly expressed incremental lines and many closely placed microscopic 

 Spiral lirations. Aperture large, subcircular, reddish brown within; outer lip thin, 

 rendered slightly angular by the keels; columella slender, concave, somewhat reflec- 

 ted over the umbilical area; parietal wall covered with a moderately thick dark 

 colored callus. Operculum thin, yellowish, with decidedly eccentric nucleus, marked 

 by many Hnes of growth." — Bartsch. 



Aufenthalt im See von Lanao auf der Philippineninsel Mindanao. — Abbildung 

 und Beschreibung nach Bartsch. — Offenbar eine Seeform der Vivipara costata 

 Quoy. 



116. Vivipara raainitensis Bartsch. 



Tat. 45. Fig. 7—9. 



Testa exurabilicata, ovato-conica, solida sed haud crassa, haud nitens, irregulariter 

 grosseque oblique striata et costis spiralibus rudibus planis sulcisque angustis undique sculpta, uni- 

 color saturate fusca. Spira conica, apice vel eroso vel incrassato; suiura impressa. Anfractus 

 6 (?) convexi, inferi infra suturara tabulati et angulati, ultimus magnus, convexus, nisi prope 

 umbilicuni undique costis rudibus, peripherica saepe multo latiore, cinctus, antice haud vel 

 vix descendens. Apertura sat obliqua, ovata, faucibus fuscescentibus et fasciolis, sulcis ex- 

 ternis nee costis respondentibus ornatis; peristoma tenue, callo tenui subcontinuum, margine 

 externe ad sulcos crenulato, columellari arcuato, albo-calloso, appresso, supra intrante. 

 Alt. 38, diam. 30, alt. apert. 20, diam. 16 mm. 



Vivipara mainitensis Bartsch, in: Pr. ü. St. Nat. Mus. 1907, vol. 32 p. 148 



t. 10 f. 9—11. 

 Vivipara raultisulcata Moellendorff in sched. — Sarasin, Celebes p. 61. 



Schale völlig entnabelt, eikegelförmig, fest, aber nicht besonders dickwandig, 

 glanzlos, unregelmassig und grob schräg gestreift, bis auf einen kleinen Raum um 



