212 AMPHIDROMUS, GROUP XV. 



The long spire, very convex whorls, and especially the nodule on 

 the parietal wall close to the posterior angle of the aperture, are char- 

 acteristic; and while the color-pattern varies within rather wide 

 limits, it does not merge into that of porcellanus. Generally there 

 are two distinct yellow bands on the last whorl, the lower one much 

 wider and bounded by dark bands ; but there is a good deal of varia- 

 tion in the flame markings, and the rose color of the base and sub- 

 sutural band fades rapidly after death, as von Martens remarks. Fig. 

 23 is the typical coloration. 



Var. subconcolor Martens. PI. 65, fig. 28. 



Entirely like slender individuals of contrarius in contour, thick- 

 ness and gloss of the shell, and peristome, but nearly uniform yellow- 

 ish white, more yellow toward the base, where the two pomegranate- 

 yellow bands of suspectus appear, similar in position to the two citron- 

 yellow ones of contrarius. No trace of streaks or black bands, but 

 the apex is purple-black, as in contrarius, suspectus and Icevis. 



Kupang, Timor, one adult and three young specimens (Martens). 



B. contrarius var. subconcolor MARTENS, 1. c A. Icevis, part, 

 Fulton, t. c. p. 76. 



The ledge and superior nodule of the parietal wall show this to 

 belong to contrarius^ not to Icevis as Fulton stated. The specimens 

 were collected by von Martens himself. 



Var. crassus Fulton. PI. 65, fig. 29. 



''This shell is similar in shape to the typical form, but is a much 

 more solid shell ; the columella is thick and round, not thin and ex- 

 panded as in the type ; whilst the aperture is somewhat higher in 

 proportion to the height of the shell, and the interrupted oblique 

 color-stripes of the type are absent on the last whorl of this species. 

 Diam. 20, alt. 40 mill." (A. contrarius var. crassa Fulton, Proc. 

 Malac. Soc. Lond. iii, p. 213, 215, pi. 11, f. 8, March, 1899.) 



Omainisa, southwestern Timor (Everett). 



The typical form also occurred at the same place. 



A somewhat remarkable variety of contrarius is represented by a 

 single specimen before me bearing the locality " Pegu," probably in- 

 correct. It has the characteristic tubercle at the posterior angle, but 

 the shell is very solid, abnormally elongated, with the two basal 

 bands interrupted and the light band of the upper surface obsolete 

 on the last whorl (pi. 65, fig. 24), 



