359 



Original description : " Shell acuminately oblong, compressly 

 umbilicated, whorls six in number, somewhat rounded, smooth, or 

 concentrically striated; transparent straw-colour, polished. A 

 very delicately coloured, transparent species." (Reeve.) 



ilab. India : Landour, Western Himalayas (Benson) ; Darjeeling 

 (Blanford, Stoliczka, Maimvaring) ; Khasi and Dafla Hills (Godwin- 

 Austen). 



The above cursory description is supplemented by Pfeiffer as 

 follows : 



" T. subperforata, turrito-oblonga, tenuicula, striatula, vix 

 nitidula, diaphana, albido-straminea ; spira turrita, apice obtusius- 

 cula ; anfr. 6-6| vix convexi, ultimus ^ longitudinis paulo superans, 

 basi rotundatus ; columella substricta, verticalis, oblonga ; perist. 

 simplex, rectum, marginibus subparallelis, columellari anguste 

 reflexo. 



"Long. 7^, diam. 3 mill. Ap. 2f mill, longa, If lata." 

 (Pfeiffer.) 



The British Museum possesses five specimens from Landour, 

 received from the Indian Museum, which are smooth and polished, 

 and very finely striated, while the columella has a slight, revolving 

 plait, to which neither Reeve nor Pfeiffer makes any reference. 

 These specimens only measure 5*5 mm. in length, whereas the 

 shell figured by Reeve has an indicated length of 7 mm. Prof. 

 Pilsbry considers the species related to 0. layardi, but the latter 

 has the outer margin of the peristome inflected, a feature lacking 

 in 0. latebricola. 



321. Opeas mariae, Jousseaume. 



Opeas maria, Jousseaume, Mem. Soc. Zool. France, vii, 1894, 

 p. 290, pi. 4. fig. 9 ; Pilsbry, Man. Conch, ser. 2, xviii, 1906, 

 p. 159, pi. 4, fig. 9. 



Original description : " Testa subperforata, elongato-turrita, 

 solidula, opaca, arcuatim striata, alba, epiteste flavido-alba, vix 

 nitens, spira elongata, apice obtusa, sutura immersa, crenulata; 

 anfr. 8, convexiusculi, ultimus -J longitudinem sequans ; apertura 

 oblongo-ovalis, superne oblique truncata; perist. simplex acutum ; 

 margine dextro superne depresso, fere recto, columellari ad 

 suturam late dilatato-reflexo, perforationis partem formante. 



" Long. 9 mill. ; diam. 2 mill." (Jousseaume.) 



Hab. Ceylon : Kandy (Simon). 



Mr. Sykes suggests (Proc. Malac. Soc. London, iii, 1898, p. 73) 

 that it is "suspiciously near" to 0. gracile^ but Jousseaume's 

 figures do not bear out this contention, as the whorls are much 

 more flattened and proportionately higher, while the outer lip of 

 the peristome is considerably more straightened. 



