b AMPHIDROMUS, S.-G. BEDDOMEA. 



albizonatus will prove to be extreme varieties of a single species. 

 The former name is the earlier. The specimen dissected by me, 

 reported as ceylanicus (Proc. Mai. Soc. Lond.), is a streaked but 

 band less form of trifasciatus. 



** The animal is of a beautiful green color, and when alive shines 

 through the shell. I am told they feed much on coffee bushes. 

 Essentially a tree species " (Layard). 



Var. INTERMEDIUS (Pfeiffer). PI. 1, figs. 10, 11, 12. 



Shell perforate, elongate-conic, rather solid, obliquely striatulate 

 punctulate, glossy, white ; spire conic, rather obtuse ; suture lightly 

 impressed, simple, whorls 6, rather flattened, the last about three - 

 sevenths the length of shell, subangular below the middle, the base 

 swollen ; columella slightly folded, somewhat receding. Aperture 

 oblique, truncate-oval ; peristome rather broadly expanded, a little 

 reflexed, margins joined by a thin callus, the columellar margin 

 dilated, triangular and flat. Length 34, diam. 16 mill.; aperture 

 with peristome 17 mill, long, 8 wide inside (Pfr.). 



Ceylon (Thwaites, type in Cuming coll.); Watawala (O. Collett). 



Bulimus intermedius PFR., P. Z. S., 1854, p. 291 ; Novit. Conch., 

 i, p. 30, pi. 8, f. 10, 11 ; Monogr., iv, 386 HANL. & THEOB., 

 Conch. Indica, pi. 19, f. 6, 8 (perhaps are ceylanicus} Phengus 

 intermedius JOUSSEAUME, t. c., p. 295. Helix ( Geotrochus) mesogena 

 MARTENS, Die Hel., p. 168 (1860); a substitute for Pfeiffer's name. 

 Amphidromus (Beddomea) intermedius Pfr., PILSBRY, Proc. Malac. 

 S6c. Lond., iv, p. 158, pi. 16, f. 2, 2a, 4, 6, 7 (anatomy). Buliminus 

 (Beddomea) intermedius Pfr., KOBELT, Conchyl. Cab., p. 679, pi. 

 103, f. 2, 3. 



The extremely thin cuticle is deciduous ; when present it is faintly 

 yellow tinted beneath. The angle at the periphery is so slight as to 

 be scarcely noticeable ; in many specimens it hardly modifies the 

 oval contour of the last whorl, and sometimes can scarcely be seen. 

 The specimens before me are punctulate only on the spire, the last 

 whorl being smooth. They vary in size from 29 to 34 mm. figs. 

 10, 11 are copies of the type figures; fig. 12 is from a Watawala 

 specimen. Differs from ceylanicus in being larger and faintly keeled, 

 but probably all intergrades occur. The weakness of the peripheral 

 carina is all that separates intermedius from albizonatus, but this 

 character varies widely in both forms. 



