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 wenigen 
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, 
hic illic anguste f'usco strigata; subtiliter striata lineolisque subtilissimis spiralibus sub vitro 
decussata. Spira acute conica, plerumque 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 mm. 
Vivipara Mearnsi Bartsch, in: Pr. U. 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 when viewed under high magnifi cation. (Nuclear whorls decollated.) 
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 strong 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 (-sliaped 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 
complete. — Operculum thin, translucent, reddish brown, with depressed eccentric 
