3 2 Original Descriptions, of Achatinella. 



36. Achatinella napus Pfeiffer. 



I. napus Pfr. P. Zool. Soc. London, 1855, p. 5, pi. xxx, fig. 19. 



A. testa imperforata, dextrorsa, turrita, solida, striatula, nitidula, albida, 

 fasciis griseo-carneis et interdum lineis castaneis cingulata ; spira elongato- 

 conica, apice alba, acuta; sutura distincte marginata ; anfr. 6 1-2, superis 

 planis, sequentibus convexiusculis, ultimo 1-3 longitudinis subitquante, 

 rotundato ; apertura diagonali, truncato-auriformi ; plica columellari supera, 

 mediocri, leviter torta ; perist. intus labiato, margine dextro recto, colu- 

 mellari subdilatato, adnato. Long. 19 1-2, diam. 10 1-2 mill. 



Shell dextral, imperforate, turrited, solid, somewhat striated, 

 shiny, whitish, encircled with grayish flesh-colored bands and 

 sometimes chestnut lines ; spire elongate-conic, apex white, acute; 

 suture distinctly margined; whorls 6 1-2, the upper flat, the fol- 

 lowing somewhat convex, the last nearly equal to 1-3 the length, 

 rounded ; aperture diagonal, truncate-auriform ; columellar fold 

 high, not large, lightly twisted ; peristome thickened within, right 

 margin erect, somewhat expanded at the columella, adnate. 



Hab. Waialee.— Bald. 



Dr. Cooke found the type shell rather narrow for a shell of 

 this section. The third and fourth whorls are light brown, with 

 broad and narrow white or light brown bands ; the suture is brown. 



37. Achatinella leucosona Gulick. 



Apex leucozonus Gk. P. Zool. Soc. London, 1873, p. 83 ; pi. x, fig. 6. 



Testa subperforata, dextrorsa, globoso-conica, nitida, incrementi lineis 

 ( baud spiralibus) striata, griseo-brunnea, saturate griseo-brunneo strigata, 

 ad peripheriam zona alba interrupta ; sutura distincte albo marginata ; spira 

 recte conica ; anfract. 6, primi 3 convexiusculi, caeteri convexi ; apertura alba; 

 perist. paululum dilatatum, dilute roseo-fusco tinctum, intus incrassatum; 

 plica columellaris valida, alba. Long. 19, diam. 12 mill. 



Shell subperf orate, dextral, globose-conical, shining, striated 

 with lines of growth (not spiral), grayish-brown, striped with dark 

 grayish-brown, separated at the periphery by a white band ; suture 

 distinctly margined with white ; spire decidedly conical ; whorls 6 , 

 first three slightly convex, the others convex ; aperture white ; 

 lip very slightly dilated, tinged with rose-brown, thickened within ; 

 columellar fold strong, white. 



Affinities. It is related to and passes into A. napus Pfr., 

 which is also found in Waialee ; but the usual forms are distin- 

 guished by having a shorter spire and a white suture, and in being 

 free from the yellowish hue of that species. 



Remarks. This species is always dextral. — Gk. 



Hab. The metropolis of this species is in Waialee. A few 

 specimens have also been found in Wahiawa. — Gk. 



