OPEA.S. 359 



Original description : — " Shell acuminately oblong, compressly 

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

 concentriealh' sti-iated; transparent straw-colour, polished. A 

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



Hab. India : Landour, Western Himalayas {Benson) ^ Dai'jeeliug 

 {Blanford, StoliczJca, Mainwaring) ; ivhasi and Dafla Hills {Godivin- 

 Austen). 



The above cursory description is supplemented by Pfeiffer as 

 follows : — 



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

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

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

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

 simplex, rectum, margiuibus subparallelis, columellari anguste 

 reflexo. 



"Long. 7g, diam. 3 mill. Ap. 2| mill, longa, 1| 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 Eeeve 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. Jatebricola. 



321. Opeas mariae, Jousseaume, 



Opens iiiarice, Jousseaume, Mem. Soc. Zool. France, vii, 1894, 

 p. 290, pi. 4. fig. 9 ; Pilsbrv, Mao. Conch, ser. 2, xviii, 1906, 

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



Original descri^ytion : — " Testa subperforata, elongato-turrita, 

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

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

 anfr. 8, convexiusculi, ultimus A longitudinem sequans ; apertura 

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

 margiue dextro superne depresso, fere recto, columellari ad 

 suturam late dilatato-reflexo, perforationis partem formante. 



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



Hah. Ceylon : Kandy {Simon). 



Mr. Sykes suggests (Proc. Malac. 8oc. London, iii, 1898, p. 73) 

 that it is "suspiciously near" to 0. graciJe, 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. 



