AMPHIDEOMTJS. 1°' 



a. Periphery rounded ceylanicm. 



b. Periphery angular. . ,. 



b' Shell elongate-conoid, whorU convex .... intennedim. 



b\ Shell pyramidal, whorls flattened phi/salis. 



c. Periphery strongly cariuate. -^^^^u,. 



cM)e.xtral ; Ceylon albtzonafus 



c\ Sinistral; Southern India . calcadenns. 



159. Ampliidronius trifasciatus, Gmelin. 



Helix trifasciatus tranquebarica, Chemnitz, Conch.-Cab. ix, part 2, 



178G, p. 155, pi. 134, figs. 1215 , . -..on x, '\(M^ 



Helix trifasciata, Gmelm, Syst. Nat i, part 6, J'^O p. 364 

 Bulimustrificsciatus, Bruguiere, Encycl. ^ |th )ers, i 1789, 



p. 317; Reeve, Conch. Icon, v, J5w/»nws, 1848 pi. 39, fag 237. 



kiffei', Conch.-Cab., Bidinucs l8o3, p. 50, pi 10 fa|- 6, 7 var. 



pi 41 fi.'-s 16, 17 ; Layard, A. M. N. H. ser. 2, xi, 18o3, p. 22b, 



kanleyl Theobald, Conch. Ind. 1870, pi. 21 fig. 3 , 



Bnlimus(Amphidro77ius) i.z7«.«cm««s, Pteitier, Malak. Blatt. a, 18o6, 



Buiilims (Cerastus) trifasciatus, von Martens, Die Ileliceen, ed. 2, 



1860, p. 232 ; Nevill, Hand Li^t, i, 18/8, p. 132. 

 Amphidromus trifasciatus, Jousseaume,M6m. Soc. Zool. France, vu, 



BuUminus ffe'ddo^nea) trifasciatus, Kobelt, Conch.-Cab., Fam. BuU- 



minidae, 1900, p. 677, pi. 102, fig. 22. , ., ^ „ , ^^^ „ 



Amphidromus {Beddomea) trifasciatus, Pilsbry, Man. Conch, eer. 2, 



B^Zk^'r^f£<!attklSi^^^^^ 



B}abnLl'cei,ianims,n^^M & Theobald, Conch. Ind. 1870, p. 11, 



Bflimimtf(Bed}hl^^^^^^ Kobeltj Conch.-Cab., Fam. Buli- 



minidae, 1900, pi. 103, tigs 5, 6. ^., , ^ m.Up Snr- 



Amphidromus {Beddomea) ceylamcus, Pilsbry, Proc, Malac. Soc. 



London,iv,1901,p. 159,pl. 16,fig.3(,iaw). 



^m//,««6- fuscoventris, Benson, A. M. N. II. ser. 2, xvui, 18o6, p. 96 



(=juv:). 



"T unibllicata, ovato-oblonga, solidula, minutissiraa striatula, 



nitida albida, fulvido-nebulosa, fasciis plunbus (plerumque S) 



castaneis ornata; spira conica, acutiuscula; anfr. 6 planiusculi, 



ultimus 4 longitudinis jcquans ; columella subrecta ; apertura 



ovalis; perist. album, late expansum, margme columellan dilatato, 



patente." {Pfeifer.) ,-,•„, - i„f„ " 



" Lono- 27 diam. 13 mill. Ap. intus 11 mill, longa, / lata. 

 Hah India: Tranquebar {Chemnitz) \:^. Ceylon: Tamanka 

 (Layard) ; Matella, Colombo, Uda Pussellawa {Collett). 



The species varies in size. I possess specimens 30 mm long, 

 16 mm in diameter. One has the upper two bauds confluent, 

 forming a broad zone which ascends the whole spire ; another 

 shows one distinct narrow band, with two indistinct ones on 

 either side on the upper portion of the latter part of the last whorl. 



