■^.±( 



49 



über sie: ,.Smaller and more solid tlian typieal quadrasi^ subangular at tlie periplierv : 

 last wliorl citlier white, reddish brown or yellow, witli a hroad ti.<Iiitc Spiral band jiist 

 bcloi<> tlic sittnrc ; upper wliorls eitlier piain wliite or \vith narrow, oblique interruptcd 

 lig'bt brown srripes." 



PlLSBüY betrachtet diese Form nur als eine Color-Form von quadrasi: er bildet 

 von ihr eine reizende Serie ab (t. G6, fig. 47, 48: fig. (30, fig. 72 — 75j und bemerkt 

 dazu: ^Specimens before me have the last whorl yellow cxcept for a broad white belt 

 below the suture, with close blue-green lines or scarcely any, the suture with a yellow 

 or red margin or none; the spire wdiitish with purplish ilames forked above. or cut bv 

 a median whitish line, into two series of pnplish spots, the upper series split or forked, 

 apex with a .^mall dark dot: the eolumella with a small reddish area or none. Some- 

 times the purplish maeulation of the early whorls extends upon the last, and in most of 

 the Shells the paiüetal wall shows a basal spiral band visible on looking in the aperture, 

 but not reaching the last whorl. The speeimens hgured are irom Balabac. This series 

 forms a practically completi' ti-ansition to vcrsicolor and ditbiiis'-'- 



5. Anii»hi(Iroiniis diibiiis Fulton. 

 Taf. LXXX. Fig. 8, 9; Taf. LXXXI, Fig. 1, 2. 



Testa sinistrorsa, imperforata, ovata vel oblongo-conica, obli(pie striatula, ad peri- 

 pheriam anfraetus ultimi subangulata. Spira conica, apice acuto. Anfractus 6 

 eonvexi, superi 3 subtranslucidi, sequentes lacteo-lutescentes, strigis obliquis 

 griseo-coerulescentibus plus minusve bifurcatis insignes, ultimus fascia spirali 

 lutea infra peripheriam ornatus, infra griseo-lutescens vel viridescens: apex 

 saturate fuscus : eolumella tenuis alba, supra leviter expansa. Apertura ano-ulato- 

 ovata, intus saturate fusoa, labro expanso, subreflexo, albo. — (FuLTON angl.) 



Alt. 31,5 — 32,5, diam. max. 17 — 18 mm. 



Araphidromus dubius FuLTOX^), in: Ann. Nat. llist. 1897, vol. XYII, p. 86, t. 6, 



lig. 1, la. — MöLLENDORFP, Verzeichniss, in; Abh. Ges. 

 Görlitz, vul. XXII, p. 150; Sep. p. 125. — HiDALGO, Atlas, 

 t. 101, tig. 7, 8; t. 140, lig. 3, 4. 



Amphidromus quadrasi var. dubius, PiLSBRY, in : Tryon, Manual, vol. VIII, p. 229, 



t. 71. Hl;-. 79—83. 



1) Shell sinistral, ovate tu oblung-couic, obliquely striate, subangulate at the periphery. imperforate ; whorls 6, 

 convex, first three semitransparent, lower whorls cream with oblique bluish-grey stripes, which are more or less branched; 

 a Spiral yellow band at lower part of last whorl, last half whorl either bluish grey or of a greenish tint; apex dark 

 brown; eolumella thin white, slightly expansed above, lip expanded and somewhat reflected, white; interior of apertur 

 dark brown. 



