132 AMPHIDROMUS, GROUP I. 



Leyte : Maasin (Semper) and Bato (Koch, Quadras). Camotes 

 (Koch). 



A. maculiferus var. multicolor v. MOELL., Bericht Senckenbergische 

 naturforschende Gesellschaft, 1893, p. 99. A.maculiferus, Exemplars 

 von Maasin, SEMPER, t. c., p. 149. 



Subsp. GRACILIOR Fulton. PI. 49, fig. 22. 



Elongated; white with horn-colored streaks, the base often faintly 

 yellowish ; apical whorls white with black or gray band above the 

 suture ; lower half of the last whorl strongly striate. 



Alt. 70, diam. 33, longest axis of aperture 35 mill. 



Alt. 52, diam. 26, longest axis of aperture 27 mill. 



Mindanao (eastern): valley of the Agusan River; Pasian Mts. 

 (Semper); Davao (Quadras). 



JB. maculiferus var. b, PFR., Monogr. iii, p. 319 ; Conchyl. Cab. 

 pi. 40, f. 9 A. maculiferus var. gracilior, Pfr., FULTON, t. c., p. 74, 

 1896. A. maculiferus, var. strigata MollfF. MSS., FULTON, t. c., 

 p. 75. v. MLLDFF., Abhandl. Nat. Ges., Gorlitz, xxii, 1898, p. 149. 

 A. nigrofilosus Rochebr., HIDALGO, Obras Malac., in Mem. Real 

 Acad. Ciencias, xiv, pi. 101, f. 1-4 (good!). 



Var. strigata is described as "like gracilior, except that the 

 ground color is light reddish brown, with oblique stripes of the same 

 color, only darker." The two names are of even date, but gracilior 

 has precedence of one page, and has been figured, so that it should 

 be retained, both on the ground of priority and of better definition. 

 There are transitions between the brown-streaked and the corneous- 

 streaked forms in the series before me, and von Mollendorff has 

 already united them. One specimen shows a dark purple varix on 

 the penultimate whorl, lacking on all other maculiferus I have seen. 

 Semper mentions a similar specimen from the Rio Agusan. Semper 

 took specimens at Batuanan, Bohol, somewhat smaller than those 

 from Mindanao, 55-60 mill, long; the apical whorls were either 

 white or banded with blue-gray. 



The A. nigrofilosus of Rochebrune, described as from Cambodia, 

 is said to be identical with this variety. If so, the name will take 

 precedence. I have thought it best to insert the description of that 

 form among the Cambodian species, pending positive information 

 upon its identity. Dr. Hidalgo separates gracilior from maculiferus 

 as a species, under the name nigrofilosus, on his plates, but I have 

 not yet seen the text, which may clear up the uncertainty. 



