68 
OPISTHOSTOMA. 
XVIII, ? Opisthostoma W. & H. Blanford, 
Pfr. Mon. Pneum. III. p. 55. — 0. Semper in Journ. 
Conch. XIII. p. 294 et Blanford ibid. XV. 1867. p. 98 cum 
dubio Diplommatinaceis adnumerant. Conf. H. Adams in Proc. 
Zool. Soc. 1866. p. 445. — Blanford in Proc. Zool. Soc. 1866. 
p. 447 ; Ann. and Mag. nat. hist. 3d. ser. XIX. 1867. p. 
305. — Stoliczka in Journ. As. Soc. XL. 1871. p. 157: genus 
Diplommatininarum. — Patel Catal. 1873. p. 17, 119: genus 
Cycloteorum. — Pledostoma H. Adams in Ann. and Mag. n. 
h. 3d. ser. XY. 1865. Nr. 87. p. 177. (Pfr. Mon. Helic. V. ^ 
p. 436.) — Scoliostoma sp. Crespigny Nat. hist, review 1864. 
p. 599. 
Species : 
1. Nilgirica Blanford. f III. 55. — Opisthostoma nilgiricum W. T. 
Blanford in Proc. Zool. Soc. 1866. t. 38. f. 13. — Pykara montium 
Nilgiri. 
2. 0. Fairbanki Blanford. t 
„Testa irregulariter ovata, albida, confertim costulata, 
lineis impressis spiralibus minutis, vix sub lente conspicuis, 
saepe obsoletis, inter costulas signata. Spira breviter subcy- 
lindrica, apice perobtuso, sutura profunda. Anfr. 5, rotundati, 
duo apicales parum exserti, ex axi deviantes, tertius multo 
major, quartus maximus, quintus brevissime constrictus, ad 
stricturam angulo acuto versus umbilicum deflexus, in figuram 
literae S curvatus, umbilicum omnino tegens, denique sinistror- 
sum ascendens, anfractus penultimus undique junctus. Apertura 
postica, verticalis, subtrigonali-rotundata; peristoma simplex, 
undique expansum. — Operculum normale. — Liam, inch 
perist. 1, 5, perist. non incl. 1; alt. 1, 5; aperturae diam. 
circa 0,5 mill. 44 (B.) 
Opisthostoma Fairbanki W. T. Blanf. in Proc. Zool. Soc. 1866. p. 448. 
t. 38. f. 14; Journ. As. Soc. Beng. XXXVIII. Pt. 
2. p. 140. t. 16. f. 6. 
Habitat prope Khandalla inter Bombay et Poona Indiae 
orientalis (S. Fairbank). 
* 
3. Crespignyi (Plectostoma) H. Adams. (Coll. 1.) Pledostoma Be 
Crespignii H. Adams in Ann. and Mag. n. h. 3d. ser. XV. p. 
177. {Pfr. Mon. Helic. V. 437.) — Issel Moll. Born. p. 76. t. 
6. f. 13 — 15. — Opisthostoma Decrepignyi Patel Cat. p. 119. — 
Labuan, Borneo. 
