OPE AS. 357 



to tlie Old World form, retaining 0. suhnla for the American 

 shells. 



The British Museum possesses specimens receiv'ed from Button 

 who collected them at Mirza])ore; these measure 13-5 x 3'5 mm. 

 My own collection contains specimens composed of nine whorls 

 and measuring 13 mm. in length. One of these contained four 

 spherical calcareous eggs 0-75 in diameter. Major Peile has 

 collected the species at Eassein and Bombay Island, some of the 

 latter having the periostracum in a beautiful fresh state, a rather 

 rare occurrence. 



Yar. panayensis, Pfeiffa-. 



BuUmiis paudi/oisis, Pfeifter, P. Z. S. 1846, p. 3."> ; ibid., Mon. 

 Helic. Viv. ii, 1848, p. 1.50. 



S'fenof/i/ra panayensiti, von Martens, Preuss. Exp. Ost-Asien. Zool. 

 Th'eil, ii, 1867, pp. 83, 376, pi. 22, fis-. 8; Tapparone Canefri, 

 Ann. Mils. Civ. Genova, xix, 1883, p. 87 ; ib., xx, 1884, p. 144 ; 

 Semper, Reisen Arch. Philipp. -2^^ Teil, iii, 188r,, p. 137, pi. 8, 

 fig. 15 (shell), pi. 11, tig-. 17 (anat.), fig-. 21 (dentition) : Wester- 

 lund, Vega Exped. Vetensk. Jakt. iv, 1887, p. 187: Hidalgo^ 

 Jouru. Conclivl. xxxvi, 1888, p. 34 ; Fischer & Dautzenberg, 

 Mission Pavie" iii, 1904, p. 411. 



Stenof/yra (Opea.s) jxnica/ensis, Pfeiffer i^t Clessin, Xomencl. Helic. 

 Viv. 1881, p. 321 ; von Martens in Max AVeber, Zool. Ergebn. 

 Reise Niederl. Ost-Indien, ii, 1891, p. 243. 



Opens (/racile, var. panayensis, Pilsbiv, Man. Conch, ser. 2, xviii, 

 1906, p. 131, pi. 18, figs. 1, 2. 



Original descnpHon : — " Bui. testa imperforatn, subulata, tenui, 

 laevigata, pehucida, cereo-hyaliua; spira elongata, apice obtuso ; 

 anfractibus 8, latis, vix convexiusculis, ultimo | longitudinis vix 

 wquante, columella brevi, strictiuscula ; apertura ovali-oblonga, 

 basi subangulata ; peristomate simplice, recto, margine columellari 

 breviter redexo. appresso. 



" Long. 11, diam. 2| mill." {Pfeiffer.) 



Hah. Ceylon : Point de Galle ( Westerland). 



Said to have a general distribution from Indo-China to the 

 Moluccas and Aru Islands. Collected in Ceylon by the Vega 

 Expedition. 



A'ar. cereus, Reeve. 



Bulinius cereus, Peeve, Conch. Icon, v, Bultmus, 1849, .=:p. oOl, 



Achat ina, pi. 17, fig. 81. 

 Bulimus (/racilis, var. 'r' cereiis, Pfeiffer, Alon. Iltjlic. \\\ . 1853, 



p. 399. ■ 

 Stexoip/ra (Opens) gracilis, var. cereus, Pfeifter Jt Clessiii, Xomencl. 



Helic. Viv. 1881, p. 321. 

 Opens gracile, var. cereus, Pilsbrv, Man. Concli. ser. 2, xviii, 1906, 



pp. 127, 128, pi. 18, lig. 7. 



Original description : — " Shell subulate, umbilicated, thin, whorls 



