238 



by exceedingljf fine spiral striations. The periphery of the last whorl of the nepionic 

 Shell is strongly angulated, while the basis is rounded like the Spaces between the 

 sutures and narrowly umbilicated. 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 by 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 many exceedingly fine inter- 

 rupted wavy spiral lirations between them. The summit of the whorls falls con- 

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

 whorls. The summits of the whorls and the rounded Shoulders are marked in ad- 

 dition to the above mentioned sculpture with oblique wrinkles, which give this part, 

 of the whorl a quite strongly malleated appearance. Periphery of the last whorl 

 angulated. Base short, somewhat inflated, well arched, excavated about the narrow 

 open umbilicus, and marked by ten subequal and irregularly spaced slender spiral 

 lirations, between which there are many exceedingly fine interrupted papillose spiral 

 lines. Aperture oval, bluish white within, bordered by a very narrow black edge 

 ou the outside ; outer lip thin ; columella concave, slender, somewhat expanded at the 

 base, and slightly reflected over the umbilicus; parietal wall covered with a thin 

 callus. Operculum orange, with depressed eccentric nucleus, marked by many lines 

 of growth. 



Aufenthalt im See von Lanao auf Mindanao. Abbildung und Beschreibung 

 nach Bartsch. 



125. Vivipara mindanensis bagangensis Barisch. 



Taf. 49. Fig. 9. 



Differt a typo testa magis globosa, saturate olivaceo-fusca , faucibus rufo fuscis , liris 

 spiralibus siibtilibus, superficie rugis obliquis obsolete malleata. 

 Diam. maj. 19,3, min. 17. alt. 22,8 mm. 



Vivipara mindanensis bagangensis n. subsp., Bartsch, in: Pr. U. St, 

 National Museum, 1907 vol. 32 p. 140 t. 11 fig. 12. 



„Shell much more globose, than, V. mindanensis, dark olive green, with a red- 

 dish tinge. Inferior of aperture reddish brown. Spire and base marked by more 

 pr less equally spaced fine spiral lirations and weakly developed obliquely forward 

 slanting folds, which lend the last two turns a malleated appearance. In additio« 



