PARTULINA, MOLOKAI. 31 



surface, deeply sculptured spirally; proximo, being glossy, with 

 weak spirals and very slight trace of the minute, wavy, spiral - 

 lineolation of the dull Partulinas. PL 7, figs. 6, 7 represent 

 two forms of rufa from Kaweeku, copied from Borcherding. 



(2) There is a dull brown (reddish to olive brown) form, with 

 a few scattered light spots, much as in a common form of P. 

 marmorata (pi. 7, fig. 4). Sometimes this form has a sub- 

 peripheral white zone (fig. 5) ; the sculpture either as in var. 

 idee or without major spirals, clothed throughout with minute, 

 crinkled, spirally descending stria3. 



(3) Another form has zebra-stripes of white and brown, ex- 

 actly as in one form of proximo,, the surface having fine deeply 

 cut Partulina sculpture. Length 28.5, diam. 16.5, aperture 15 

 mm.; whorls 7 (fig. 8). 



(4) Similar to var. idee, except that the spiral engraving is 

 close, nearly even, without granules. Last whorl of the embryo 

 having very obliquely protractive brown stripes; following 

 whorls pale yellow, darker towards the base, or showing some 

 faint tawny stripes on the spire. Aperture pinkish white, colu- 

 mella and narrow lip pale flesh-pink. PI. 7, fig. 9, 10, 11. 



Length 23, diam. 14.2, aperture 12 mm. 

 Length 17, diam. 10.2, aperture 8.2 mm. 



(5) Partulina rvfa var. idee. Borcherding (pi. 7, figs. 13, 14, 

 15), from Kalae and Kealia, may easily be recognized, accord- 

 ing to Borcherding, by its compressed and ventricose shape and 

 the regularly granulose spiral sculpture (fig. 13). The last 

 whorl is more or less distinctly uniform yellowish-brown, or has 

 a yellowish-white belt below the middle, the upper whorls 

 being zigzag marked. In a series of 40 specimens before me I 

 find the characters so variable that I cannot look upon P. idee as 

 anything but a local race. The sculpture in particular inter- 

 grades perfectly with typical P. rufa. 



In many specimens of idee the color above the periphery is 

 pale or even whitish, and on the base it becomes yellow, rich 

 brownish-yellow or olive, the change being gradual in some, 

 abrupt in other examples. In many of the pale forms the 

 stripes of the last embryonic whorl are faint or even not dis- 

 cernible. 



