AMPHIDEOMUS. 191 



163. Amphidroinus intermedius, Pfeiffer. 



Buliinus intermedius, Pfeiffer, P. Z. S. 1854, p. 291 ; ibid., Novit. 



Conch, ser. 1, i, 185o, p. 30, pi. 8, iigs. 10, 11 ; Hanley & Theobald, 



Conch. Ind. 1870, pi. 19, tigs. 6, 8. 

 Helix ( Geotrochus) mesogena (nom. mut.), von Martens, Die Heliceen, 



ed. 2, 1860, p. 168. 

 Bulimm [Amphidromits) intertnediuSf Pfeiffer, Malak. Blatt. ii, 



18o6, p. 147. 

 Amphidroinus ( Beddomea) intermedius, Nevill, Hand List, i, 1878, 



p. 127 ; PiLsbry, Proc. Malac. See. London, iv, 1901, p. 158, pi. 16, 



tigs. 2, 4, 6, 7 (an^ttoray). 

 Cochlosfyla {Phemjus) intermedia, Pfeiffer & Clessin, Nomencl. Helic. 



Viv. 1881, p. 210. 

 Buliminus {Beddomea) intermedius, Kobelt, Conch.-Cab., Fani. Buli- 



minidae, 1900, p. 079, pi. 103, tigs. 2, 3. 

 Amphidromus (Beddomea) cet/lanicus, var. intermedius, Pilsbrv, Man. 



Conch, ser. 2, xiv, 1901, p. G, pi. 1, tigs. 10-12. 



Orir/inal description : — " T. perforata, elongato-couica, solidula, 

 -oblique striatula et punctiirata, nitida, alba ; spira conica, 

 obtusiila; sutura levis, simplex; anfr. 6 planiusculi, ultinius |- 

 longitudinis subae(iuans, iufra medium subangulatus, basi turgidus ; 

 columella leviter plicata, subrecedens ; apertura obliqua, truucato- 

 ovalis ; perist. sublate expansum, reflexiuscukim, marginibus callo 

 tenui juuctis, columellari piano, dilatato, triangular!. 



" Long. 34, diam. 10 mill., ap. c. perist. 17 mill, longa, intus 8 

 lata." (Pfeiffer.) 



Hob. Ceylon (Thwaites, Xevill). 



A. intermedius is more angulate at tbe peripbery than 

 A. ceylanicus, the apex is more obtuse and the columellar margin 

 more triangularly dilated and flattened. 



164. Amphidromus ceylanicus, Pfeiffer. 



Buliinus ceylanicus, Pfeiffer, Symb. Hist. Helic. iii, 1846, p. 83 ; 



ibid., Mon. Helic. Viv. ii, 1848, p. 59 ; Reeve, Conch. Icon, v, 



Bulimus, 1848, pi. 43, fig. 274 ; Deshayes in Ferussac, Hist. 



Nat. Moll, ii, part 2, 1851, p. 7G, pi. 145, figs. 5, 6 ; Lavard, 



A. M. N. 11. ser. 2, xi, 1853, p. 226; llanley & Theobald, Conch. 



lud. 1870, pi. 21, fig. 2. 

 Bulimus {Amphidromus) ceylanicus, Albers, Die Heliceen, 1850, 



p. 139. 

 Helix { Geotrochus) ceylanica, von Martens, Die Heliceen, ed. 2, 1860, 



p. 168. 

 Amphidromus {Beddomea) ceylanicus, Nevill, Hand List, i, 1878, 



p. 127; Pilsbrv, Man. Conch, ser. 2, xiv, 1901, p. 6, pi. 1, 



tig. 7. 

 Cochlostyla {Phengus) ceylanica, Pfeiffer & Clessin, Nomencl. Helic. 



Viv. 1881, p. 210. 

 Buliminus {Beddomea) ceylanicus, Kobelt, Conch.-Cab., Fani. Biili- 



miuidae, 1900, p. 080 (excl. figures). 



Original description : — " T. aperte perforata, ovato-conica, solida, 

 -oblique striatula, nitidula, alba; spira conica, acutiuscula; anfr. 6 



