Original Descriptions of Achatinella. 71 



99. Achatinella emmersonii Newcomb. 



A . emmersonii Newc. P. Zool. Soc. London, 1853, p. 156, pi. xxiv, fig. 74. 



Shell conical, polished, dextral, rather solid ; whorls 6, round- 

 ed ; margined above ; suture distinct ; aperture subovate ; colu- 

 mella short, tuberculate ; lip acute, margined with black within; 

 aperture internally pure white ; exterior of shell uniform pearly 

 white. IyOiig. 11/20, lat. 8/20 poll. 



This shell in its general aspect is the complete counterpart of 

 A. mighelsiana of Pfeiffer. The latter species is from Molokai. 

 This is clearly distinct, as may be seen from a cursory examina- 

 tion of the two species. — Newc. 



Hab. District of Waialua. — Newc. 



Dr. Cooke found the type shell to be a light variety of A. livida 

 Swains. 



100. Achatinella undulata Newcomb. 



A. undulata Newc. P. Boston Soc, vol. v, 1855, p. 218. 



Shell sinistral or dextral, rather solid, acutely conical, shin- 

 ing, polished ; with longitudinal oblique fine striae; microscopically 

 spirally striate ; whorls 6, rounded and marginal above ; suture 

 well impressed ; aperture sub-ovate ; columella short and plicately 

 twisted ; lip acute, thickened within. Color light olive alternating 

 with slightly undulating chestnut lines and bands, rarely marked 

 by transverse black fasciae ; columella and aperture white. Long. 

 12/20, lat. 6/20 poll. 



Remarks. This species, very variable in color and size, has 

 in all cases the undulating markings by which it acquires its name. 

 The specimen illustrated varies in the latitude from that given 

 above by 2/20 in., and is more obese in consequence. — Newc. 



Hab. Waialua. — Newc. 



101. Achatinella glauca Gulick. 



A.glauca Gk. Ann. Lye. New York, vol. vi, 1858, p. 232, pi. viii, fig. 51. 



Shell sinistral, rarely dextral, imperforate, acuminately ovate, 

 solid, shining, striated, fawn or lead colored, with two black bands, 

 one entering the aperture ; apex somewhat acute, white ; spire 

 conic, with slightly convex outlines ; suture marginate, moderately 

 impressed ; whorls 6, convex ; columellar fold central, white or 

 pale pink, moderately developed ; aperture sinuately oval, white 

 within ; peristome thickened within ; with external margin un- 



