AMPHIDROMUS. 191 



163. Amphidromus intermedius, Pfeiffer. 



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



Conch, ser. 1, i, 1855, p. 30, pi. 8, figs. 10, 11 ; Haniey & Theobald, 



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

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



ed. 2, 1860, p. 168. 

 Bulimus (Amphidromus) intermedius, Pfeiffer, Malak. Blatt. ii, 



1856, p. 147. 

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



p. 127 ; Pilsbiy, Proc. Malac. Soc. London, iv, 1901, p. 158, pi. 16, 



figs. 2, 4, 6, 7 (anatomy). 

 Cochlostyla (Phengus) intermedia, Pf eiffer & Clessin, Nomencl. Helic. 



Viv. 1881, p. 210. 

 Buliminus (Beddomea) intermedius, Kobelt, Conch.-Cab., Fam. Buli- 



minidae, 1900, p. 679, pi. 103, figs. 2, 3. ^ 

 Amphidromus ( Beddomea) ceylanicus, var. intermedius, Pilsbry, Man. 



Conch, ser. 2, xiv, 1901, p. 6, pi. 1, tigs. 10-12. 



Original description : " T. perforata, elongato-conica, solidula, 

 oblique striatula et puncturata, nitida, alba; spira conica, 

 obtusula; sutura levis, simplex; anfr. 6 planiusculi, ultimus |- 

 longitudinis subaequans, infra medium subangulatus, basi turgidus ; 

 columella leviter plicata, subrecedens ; apertura obliqua, truncato- 

 ovalis ; perist. sublate expansum, reflexiusculum, marginibus callo 

 tenui junctis, columellari plario, dilatato, triangulari. 



41 Long;. 34, cliam. 16 mill., ap. c. perist. 17 mill, longa, intus 8 

 lata." (Pfeiffer.) 



Hob. Ceylon (Thwaites, Nevill). 



A. intermedius is more angulate at the periphery than 

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

 more triangularly dilated and flattened. 



164. Amphidromus ceylanicus, Pfeiffer. 



Bulimus ceylanicus, Pfeiffer, Synib. 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. 70, pi. 145, figs. 5, 6 ; Layard, 



A. M. N. H. ser. 2, xi, 1853, p. 226 ; Haniey & Theobald, Conch. 



lud. 1870, pi. 21, tig. 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 ; Pilsbry, Man. Conch, ser. 2, xiv, 1901, p. 5, pi. 1, 



tig. 7. 

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



Viv. 1881, p. 210. 

 Buliminus (Beddomea) ceylanicus, Kobelt, Conch.-Cab., Fam. Buli- 



minidae, 1900, p. 680 (excl. figures). 



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

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



