278 HELTX-PLANISPIRA. 



usual two bands ; in fasciolata there is no trace of these markings, 

 but the two bands are broad and conspicuous. 



The animal is ochre-yellow externally; sole 21 mill, long, 11 

 broad. Jaw slightly arcuate, lightly striated. 



Var. ZONARIA L. PI. 44, figs. 4, 5, 6, 7, 8, 10. 



Shell having a row of spots or oblique streaks above, generally 

 banded below. The following color-forms have been named. A 

 part of the specimens before me combine characters of several of 

 them ; others could be named as new varieties, if such a course were 

 desirable. 



Form lineolata Mart. (pi. 44, figs. 4, 5). Yellowish-brown 

 above, with gray flecks and lines ; gray below with narrow brown- 

 ish-yellow, often interrupted spiral bands. Usually rather large. 

 Peristome rather narrow, pale rose-colored, rarely in fresh examples 

 white. Island of Amboyna. This should be considered the typical 

 zonaria. 



Formfulminata Mart. (fig. 10). Reddish-gray or whitish, with 

 opaque whiter markings radiating from the suture, at first wavy, 

 then zigzag ; beneath banded with white ; the whole shell often 

 washed with rose-red. Always a subperipheral band ; often a supra- 

 peripheral, both broad and dark, nearly black. Peristome broad, 

 usually rose-red. Size above the medium. Isl. of Buru ; Banda- 

 Neira. 



Form obliquata Mart. (fig. 8). Ochre-brown or isabelline, with 

 clearer, oblique, close rays. No band, or only a subperipheral 

 dark chestnut one. Peristome pale violet or white. Medium size. 

 Isl. of Ceram. 



Form maculata Mart. Yellowish-brown, with a row of dark 

 brown spots, mostly quadrangular, sometimes appearing as inter- 

 rupted .bands; beneath brown with few yellowish-brown narrow spi- 

 ral bauds. Peristome pale reddish, broad, medium size or over. 

 Ceram. 



Form coluber Beck, (figs. 6, 8). Isabella-yellow, with darker, 

 mostly crescentic spots, banded below. Ceram. This is the var. lun- 

 ulata of Martens. 



Var. FASCIATA Martens. PI. 44, figs. 9, 14, 14, 15. 



Shell with bands (rarely lacking), but no spots or oblique streaks. 



Form fasciata (fig. 9.) Ground-color pure white; subperipheral 

 and supra-peripheral bands present, and very often a broad band 



