AMPIIIDROMUS, GROUP IV. 149 



scribed as smooth, of a beautiful citron-yellow, sometimes verging 

 toward reddish, without flammules, but almost always with one, 

 rarely two, black-brown varices, usually on the penult, whorl, but 

 varying in position ; when dark varices were wanting, a white stripe 

 replaced them, but only on two shells. The contour varied, alt. 49, 

 diam. 24, and alt. 4G, diam. 27, being the extremes. Sinistral and 

 dextral shells were in about equal numbers. Young shells show a 

 narrow, dark brown spiral band somewhat below the periphery. 



Dr. Max AVeber collected similar shells at Bulu Sipong, near 

 Maros, and at Loka, near Bonthain ; reported on by von Martens. 

 The contour varying considerably, the smallest, alt. 37, diam. 22 

 mill., and the more obese examples 37-38 long, 2G wide. The var. 

 " aureus " Mart, was taken at Tempe (AVadjo), this being the first 

 definite locality for the orange-yellow form. 



Mr. A. Everett also took specimens in the region of Mt. Bonthain, 

 similar in characters to the above typical form. They occurred with 

 interruptus, at a height of 2000 ft. (Smith, 1896.) 



Von Mollendorff reports specimens collected by Fruhstorfer at 

 Bua Kraenz occurring with inferruptus. 



P. & F. Sarasin found the typical perversus at Makassar, 25 dex- 

 tral and 7 sinistral shells, and on the Lura lake, a large, very nar- 

 row form which is rare at Makassar, and has generally a brown- 

 violet tinted peristome, 15 sinistral shells. 



Var. niveus P. & F. Sarasin. PI. 51, fig. 47. 



Snow white with black varices and often a dark stripe behind the 

 peristome. Variable in proportions as well as absolute size, alt. 42 to 

 53 mill. Seven specimens show a narrow brown spiral line close to 

 the suture, on the upper whorls, and in four there is the rudiment of 

 a dark band at the periphery of the last whorl near the mouth. 



Celebes : Fare-Pare, on dry andesite hills, 34 specimens; EureJcang 

 1 specimen ; all sinistral (Sarasin). 



Two typical, yellow, sinistral perversus occurred with the niveus, 

 Sarasins regarding them as atavistic individuals. 



JAVA. On the outliers of Gunung Gedah, Dr. Adolf Strubell 

 found both dextral and sinistral specimens, which Boettger describes 

 as perforate, rather glossy, obesely fusiform-ovate, of a beautiful 

 uniform citron-yellow with white, appressed suture, which is dis- 

 tinctly crenulated by growth-stria?, and without dark varices. Alt. 

 48-49, diam. 27^-28, alt. aperture 25 mill, (dextral); alt. 51, diam. 



