LAND- AND FRESHWATER SHELLS. 153 



streaks on the last whorl, and have a white sutural zone; the 

 full-grown specimen has a yellowish apex and two rows 

 of brown blotches on the next whorls, which cease abruptly 

 on the penultimate whorl ; the younger specimen has a 

 dark apex and dark flames , of which only a few are 

 divided by a narrow white spiral zone ; the penultimate 

 whorl is partly brown-shaded. This species shows affinities 

 to many other species of the East-Indian Archipelago , 

 the upper whorls of some specimens recall in mind A. 

 contrarius Mull., the green whorl resembles some varieties 

 of A. furcillatus. They differ from every known species by 

 the uncommon development of the peristome, which is 

 most characteristic and suffices to recognize the species at 

 first sight. 



*o' 



12. AmpJiidromus contrarius Muller. 



Martens, Ostas. Landschn. p. 363; Taf. 20, fig. 7% 7b, 7". 



Localities : Koepang and Amarassi , Timor. 



One full-grown and one juvenile specimen from Koepang , 

 belong to the variety figured by von Martens at fig, 7". 

 The only specimen from Amarassi is dark towards the 

 aperture, which is not completely developed and has a 

 purple brown margin. 



13. 'i Amphidromus suspectus v. Martens. 



Martens, Ostas. Landschn. p. 362; Taf. 21, fig. 8. 



Locality: Soemba. 



Only one juvenile specimen has been collected ; the third 

 whorl shows faint traces of dark blotches. Prof. v. Martens 

 writes that it difi'ers from his specimens by the vivid 

 citron-yellow colour, and the distinctly limited dark rosy 

 spot near the umbilicus , which characters call in mind 

 A. laevus Mull. , where the rosy spot extends however to 

 the black band. As all the specimens of A. laevus I com- 

 pared , have more or less distinct bands on the upper 



Notes from the Leyden Museum , Vol. XIV. 



