290 AMASTRA, MAUI. 



Soc., London, ii, pt. 3, p. 129, October, 1896. Amastra 

 (Laminella) villosa SYKES, Fauna Hawaiiensis, p. 352, pi. 

 11, f. 24. Amastra elongata Newc., BORCHERDING, in part, 

 Zoologica, xix, 1906, p. 124, pi. 10, f. 24 (Waialua, Molokai). 



The shell in Mauian specimens is usually rimate, not often 

 imperforate as described by Pease. The embryonic whorls 

 are very beautifully costellate, the riblets curved as usual. 

 The later whorls have a coarse sculpture of uneven wrinkles. 

 The later whorls have a thin rusty or chestnut cuticle over a 

 light yellow under-layer which is exposed by wear on the 

 wrinkles, and is plastered or daubed with blackish dirt. Be- 

 neath the cuticle the shell is white. The columellar lamella 

 is small and strongly oblique. 



Length 24.5, diam. 7.3, aperture 6 mm. ; 1% whorls. 



Length 15, diam. 7, aperture 6 mm. ; 7 whorls. 



There are two forms or races, a larger, with aperture one- 

 fourth the length, and a smaller or typical race, aperture two- 

 fifths the length, as in Pease's description. Both occur at 

 Makawao. The species is readily known by its long contour 

 and rude sculpture. " We have attached to this species the 

 name of the Hon. F. W. Hutchinson, Judge of the Circuit 

 Court, to whom we are indebted for several rare shells " 

 (Pse.\. 



Having examined a series of shells from Molokai we are 

 unable to find any character to separate them from the 

 larger race of Maui. We agree with Borcherding that A. 

 villosa is a synonym. The original description and figure 

 (pi. 49, fig. 8) are given; also other figures representing 

 Molokai specimens (figs. 3, 4). The original description fol- 

 lows. 



"Amastra villosa. Shell elongate-turrited, sinistral, sub- 

 imperf orate, rather thick ; pale corneous covered with a brown 

 epidermis. Whorls 7 to 7%, convex, longitudinally and ir- 

 regularly, strongly striated; suture well impressed. Aper- 

 ture lunate, nearly vertical; peristome unexpanded, acute, 

 whitish; columellar lamina small. Length 20, diam. 7 mm." 

 Molokai, Perkins. (Sykes.) 



11 This shell, nearly related to A. kutckinsonii Pease from 



