222 



Hinterindien und vielleicht Japan ; — die der costata auf Nord-Celebes, Borneo, den 

 Molukken und Philippinen, — und die der javanica auf Java, Süd-Celebes und 

 Saleyer. — Die geographische Scheidung ist eine sehr scharfe ; nur an ganz vrenigen 

 Gränzpunkten schieben sich die Verbreitungsgebiete in einander. 



112. Vivipara mearnsi Bartsch. 



Taf. 45. Fig. 4. 



Testa major anguste perforata, conica, acute carinata, tenuis, polita, lutescenti-viridis, 

 hie illic anguste fusco strigata; subtiliter striata lineolisque subtilissimis spiralibus sab vitro 

 decussata. Spira acute conica, plerunique erosa; sutura carinae vestigia exhibens. Anfractus 

 superstites convexi, carina in sutura ipsa appressa, inferi 2 infra carinam suprasuturalem 

 subexcavati; ultimus carina distincta exserta ad peripheriam cinctus, basi plano-convexus. 

 Apertura sat magna, ovata, extus acute angulata; marginibus callo crasso super parietem 

 aperturalem junctis, labro externo tenui, acuto, columellari gracili, concavo. — Bartsch angl. 



Alt. 43,8 diam. 36,3, dim. apert. 21,5; 17,2 inm. 



Vivipara Mearnsi Bartsch, in: Pr. ü. St. National Museum vol. 32 p. 143 

 t. 10 fig. 3. 



„Shell thin, polished, conic, strongly keeled at periphery, greenish-yellow, with 

 irregularly disposed, narrow, dark longitudinal bands , which appeer to mark resting 

 stages. The entire shell on the spire and base is marked by fine incremental lines 

 and very fine, closely spaced, spiral striations, which lend the surface a finely reti- 

 culated aspect vsrhen viewed under high magnification. (Nuclear whorls decoUated.) 

 Succeeding turns well but not evenly rounded , the posterior half between the sum- 

 mit and the periphery being decidedly more convex than the anterior. Periphery of 

 the whorls bearing a streng narrow compressed keel, which is apparent above the 

 suture in all the volutions. On the earlier ones it is appressed quite closely to the 

 summit of the succeeding turn, while in the last two volutions the summit falls- 

 somewhat below the keel and makes this appear all the more prominent. Base 

 Short, evenly and strongly arched, with a narrow perforate umbilicus. Aperture 

 ovate, rather large, thn outer lip thin, rendered {-shaped by the keel in the middle ;. 

 columella slender,' concavely curved; parietal wall covered by a thick callus which 

 joins the columella and the posterior angle of the aperture, rendering the peristome 

 c-omplete. — Operculum thin, translucent, reddish brown, with depressed eccentric 



