312 ACHATINELLA SW1PT1I. 



low, encircled with two to six brown or cinereous-brown 

 bands [pi. 58, fig. I2a]. 



"Var. b. Shell entirely yellow. 



"Station, on trees. Habitat: the metropolis is in Kalaikoa 

 on Oahu ; it is also found in Ahonui. 



"Affinities: it is most nearly allied to A. tuberans Gulick. 

 Remarks: In Kalaikoa all are dextral; in Ahonui one-tenth 

 are sinistral. The specimens figured are from Kalaikoa' 

 (Gulick). 



The type of flavidus is the largest specimen I have seen. It 

 retains the yellow cuticle only on the base. Above the periph- 

 ery it is white, with a broad Vandyke brown band at the 

 periphery and above the suture, and a brown line below the 

 suture. The embryonic whorls are white with a pale gray tip. 

 This pattern, although selected for the type, is rare. Out 

 of 53 Kalaikoa flavidus from Gulick before me, only 5 have 

 it. The bandless form is also rare. Usually there are several 

 bands, of a russet color, or more olivaceous (Dresden brown 

 or Saccardo's olive). Then we have shells with purplish-gray 

 streaks appearing faintly; also, all manner of transitions to 

 the Kalaikoa "tuberans.' A common pattern is shown in pi. 

 58, fig. 126, Kalaikoa, Gulick coll., A. N. S. Shells with 

 the yellow cuticle of fl,avida over the oblique streaks of siviftii 

 also occur in Kalaikoa. pi. 58, figs. 13-13&, Gulick collection. 

 The shells of this lot vary a good deal, like all the Kalaikoa 

 forms of this group. I am rather surprised that Mr. Gulick 

 did not make a species of them, as the more characteristically 

 marked examples, figs. 13a, fc, are as distinct as any of his 

 Kalaikoa- Ahonui species. 



"Apex coniformis Gk. (pi. 59, figs. 2, 20, Ahonui, and pi. 

 58, figs. 8, 16, Gulick coll.). Shell sinistral (sometimes dex- 

 tral), globose-conic, glossy, obliquely striated with growth 

 lines but scarcely spiral lines; brown, streaked with pale 

 brown, indistinctly encircled with several whitish lines ; suture 

 margined with deep brown. Spire lightly concave. Whorls 

 6!/2> the first 3 1/2 a little convex, whitish, the rest convex. 

 Aperture receding, white ; peristome a little dilated and thick- 

 ened within, the margin tinted with dilute rose (or brown) ; 

 columellar fold strong. Length 18, diam. 12 mm. 



