344 LAMINELLA, MAUI. 



siderably from the description. As there is no description 

 with which it agrees I venture to describe it as a new species. 

 I have followed Mr. Sykes in placing Laminella as a sub- 

 genus of Amastm. 



16 This species differs from A. erecta Pse., as all the speci- 

 mens are sinistral and are minutely perforate. The brown 

 epidermis covers the whole of the shell and is not fugacious 

 as in all the other species of Laminella. The darker zigzag 

 markings are in the epidermis and are, also, not fugacious. 

 There is a straw-colored variety of which I have seen a single 

 specimen " (Cooke). 



A cotype from no. 16662 Bishop Museum is drawn in figs. 

 11, 12. It measures 11.8x6.8 mm., having 5% whorls. There 

 are some sparse dark markings on the last whorl of this in- 

 dividual. The type figure is also copied, pi. 49, fig. 15. 



11. L. ASPERA Baldwin. PL 53, figs. 10, 11, 12. 



The shell is perforate, conic, rather short; fleshy- white,, 

 yellow, or almost orange, the apex bluish or purplish black, 

 last 2% to 3i/2 whorls decorated with irregular longitudinal 

 black stripes which are deeply sunken; the surface therefore 

 being strongly corrugated or plicate. Rarely the stripes are 

 absent, and the surface sunken in few places. 2% embryonic 

 whorls are smooth, the apex rather blunt and rounded, as in 

 L. alexandri. Neanic and last whorls are strongly convex, 

 marked with fine growth-lines. Aperture is short, wide, but 

 slightly oblique. Columellar fold small, not ascending steeply. 

 Above it the columella is calloused and bears a fold, some- 

 times irregular or small, sometimes almost as large as the 

 eolumellar lamella. 



Length 11, diam. 7 mm. ; 5% whorls. 



Length 10, diam. 7 mm. 



Length 10.2, diam. 6.2 mm. 



West Maui: Wailuku valley (Baldwin). 



Laminella aspera BALD., Nautilus, XXII, November, 1908, 

 p. 68. 



Very distinct by its sunken stripes. It is much shorter 

 than the Molokaian L. venusta, a species having this character 



