AMPHIDROMUS, GROUP IV. 143 



Alt. 43, diam. 21, longest axis of aperture 21 mill. 



Philippines: Samboanga, S.- W. Mindanao; also Basiian. 

 Bulimus chloris REEVE, Condi. Icon. pi. 37, f. 223 (Sept. 1848). 

 MOUSSON, Moll. Java, p. 108 PFR., Zeitsch. f. Malak. 1849, p. 

 137 ; Monogr. Hel. Viv. iii, 320 ; iv, 382 ; vi, 26 ; viii, 42 ; Conchyl 

 Cab. p. 183, pi. 49, f. 7, 8 ADAMS & REEVE, Zool. Samarang, 

 Moll., p. 58, pi. 14, f. 10 (living animal, Mindanao). Amphidromus 

 chloris Rve., SEMPER, Reisen im Arehip. Phil., iii, Landmoll., p. 



148 HIDALGO, Journal de Conchyl., 1888, p. 32; Obras Malaeo- 



logicas, Mem. Real Ac-ad. Ciencias de Madrid, xiv, pi. 99, f. 3, 4. 

 MOELLENDORFF, Verzeiclniiss der auf den Philippine!! lebenden 

 Land-mollusken, in Abhandl. Naturfbrsch. Gesellscli. zu Gorlitz, 

 xxii, 1898, p. 149. Bulimus sulphuratus HOMBRON & JACQUINOT, 

 Voy. an Pol Sud, pi. 8, f. 10-12 (? 1848-1853); and text by Rous 



seau, p. 29 (1854) Bulimus (perversus rar.) sulfuratus MARTENS, 



Ostas. Zool. p. 351. 



Not A. chloris Jacobi, see A. melanomma natunensis. 

 Well distinguished from A. pervtrsus by the more or less open 

 umbilicus, non-adnate lip, want of dark varices, elongate form and 

 smaller aperture; and different in its cycle of variations, as well as 

 geographically segregated. The specih'c rank of A. chloris rests 

 upon a basis wholly different from iiiterruptus, and far less question- 

 able. 



Pfeifi'er, Semper and Hidalgo luive affirmed the identity of B. sul- 

 phnralus with chloris. The type locality of the former is Samboanga, 

 in southwestern Mindanao, while chloris was from " Eastern Islands." 

 Fulton and some others have reported cltloris from the Malay Pen- 

 insula ; but I am disposed to consider this locality a mistake, or based 

 on a similar but distinct form. If it should be correct, then the 

 species described above will take the name sulphuratus. 



Semper found it rather common in marsh and mountain region 

 about Samboanga, but not on the adjacent island of Basiian. All 

 were sinistral, some being yellowish-white, others the typical straw 

 color. Arthur Adams collected "a bushel" of them on the moun- 

 tains of Mindanao, all " of the same elongated form and deep yellow 

 color throughout, with no indication of bands or marking." The 

 animal is of a pale brown color. 



The J. B. Steere expedition to the Philippines collected specimens 

 at Samboanga typical in form and coloring (pi. 50, figs. 29, 30), and 



