ACHATINELLA FULGENS. 193 



ery, with two black bands, one above, the other below 

 the periphery. PL 37, fig. la. 



6. Fulgens pattern. Chestnut-brown above and below a 



peripheral white or yellow band, which ascends the spire 

 above the suture. PL 37, fig. 1. This is a rare form, 

 but it is what Newcomb selected as typical of fulgens. 



7. Crassidentata pattern. White, with yellow or olivaceous 



bands below the suture, at the periphery and around the 

 axis, the upper one often wanting. PL 30, fig. 23. A 

 rare pattern. 



8. Liliacea pattern. Albino or albinistic forms occur in some 



colonies, and may be derived from various patterns. 



The typical fulgens color-form described by Newcomb is 

 shown in pi. 37, fig. 1, this specimen being from Waialae 

 nui, Cooke collection. Newcomb 's original figures, repro- 

 duced in pi. 29, figs. 24, 24a, represent other color-forms, 

 fig. 24 being Newcomb 's var. a, while fig. 24a is what was 

 subsequently described as A. augusta. 



Niu. Plate 36, figs. 4 to 6e. The plumata pattern of fine 

 oblique, vinaceous cream or slaty-purple lines and streaks 

 over a white, vinaceous, or white-and-yellow ground, is es- 

 pecially characteristic of Niu. Figs. 5 to 5e show the patterns 

 in a lot collected by Mr. Gulick. The shells are rather small, 

 19 to 21 mm. long. There are also shells of the trilineata 

 pattern and albinistic specimens in which the brown bands 

 are reduced by absence of the subsutural or the subsutural 

 and basal. A few have no bands (pi. 36, figs. 5 to 5e). 



A series received from Mr. Thaanum, collected recently, 

 consists mainly of larger shells, pi. 36, figs. 6 to 6e. This con- 

 tains typical plumata pattern, fig. 6 ; plumata with yellow 

 cuticle on the base, fig. 6a; plumata with white and dark 

 bands, fig. 66, c ; trilineata pattern, fig. 6d ; and albino forms, 

 fig. 6e. There is clear segregation of the elementary patterns 

 in most specimens, but blends are not uncommon, such as 

 figs. 4 and 6c, which seem to be blends of plumata and tri- 

 lineata. 



A large series in Mr. Spalding's collection, from the west- 



