A New Variety of Partulina Horneri 



By A. GouvEiA 



Partulina horneri, (Baldwin) var. kapuana, n. var. 

 J. J. and A. GOUX'EIA. 



PLATE XV. 



Shell sinistral, translucent, apex acute, spire slightly concave, surface 

 shining", the first two whorls nearly uniformly light brown in adult specimens, 

 3rd, 4th, 5th and 6th, brown, obliquely marked with white zigzag lines, last 

 whorl ligliter colored than the upper whorls, gradually becoming lighter and 

 nearly pure white just in back of the lip and furnished with a white band 

 just below the periphery, the upper margin of the l)and is bordered by a 

 slightly darker shade of brown ; whorls 7, first five slightly convex, the last 

 very much inflated, forming a little more than half of the shell, rounded at 

 the periphery ; suttn-e simple and slightly impressed ; columella simple, white, 

 nearly straight, slightly convex below, broader above and covering a deep 

 circular umbilicus ; aperture large, seniiovate. white within ; margin of the 

 lip tliin, edged on the outside with a very narrow dark line, slightly thickened 

 within. 



Length 24 mm. diam. (diagonal) 14 mm.; aperture, length 12 mm., 

 diam. 9.3 mm. 



Embryo ; light brown with a narrow dark brown peripheral band, 

 bordered on both sides by a white band and with broad indistinct irregular 

 stripes. There were about four to each pregnant specimen. 



Habitat : Waialohe, Kapua, South Kona, Hawaii : About one-half mile 

 above Government Road; on Pua trees, very scarce. (A. Gouveia.) 



Holotype : B. P. B. Museum, No. 49227, paratypes. Academy of Natural 

 Science, Phil., and Gouveia Collection. Nos. 338. 404 — 3-6-7-8 and 429. 



This form is provisionally placed as a variety of P. horneri 

 althotigli their habitats are widely separated. P. Ji. kapuana agrees 

 with P. horneri in texture of the surface. It dififers, however, in its 

 narrower form, more rounded periphery and darker juvenile whorls. 

 From P. eoiifusa it differs in its smoother surface, more regularly 

 coiled spire, and lighter and more distinct color pattern. 



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