330 ACHATINELLA APEXFULVA. 



beata, which includes his no. 3930, 3931, 3853, 3854; the last 

 from far up and upon the ridge, at 12 on the map, p. 277. 

 The first locality is on the lower part of the same ridge. 



37e. A. APEXFULVA ALOHA P. & C., n. subsp. PL 60, figs. 15, 

 16. 



The shell is dextral, rather small and light, often perforate ; 

 white, with unequal spiral bands of pale cinnamon pink on 

 the penultimate and last whorls, deepening to brownish vina- 

 ceous or orange-cinnamon behind the lip, where they usually 

 become confluent. The embryonic whorls and a broad band 

 below the suture are white. Peristome moderately thickened 

 within, light purplish vinaceous, the columellar fold paler. 



Length 18.5, diam. 12.7 mm. ; 6% whorls. 



Length 19.2, diam. 11.9 mm. ; 6y 2 whorls. 



Crest of the division ridge between the two branches of the 

 Kaukinehua stream, above the Wahiawa head-gates cabin, the 

 colony extending to within % mile of main ridge; on moki- 

 haua, pua, maile and alani. Cotypes in collections A. N. S. P. 

 and Bishop Mus., from no. 3818 Irwin Spalding coll. 



By its cleanly-defined pinkish bands, absence of streaks and 

 white embryo, this snail is well distinguished from other 

 forms of A. apexfulva. It is very constant in a large series 

 collected by Mr. Spalding, except for a mutation which occurs 

 in the same colony. This is illustrated in pi. 60, fig. 16, and 

 differs from normal A. a. aloha only by having the bands 

 chocolate-black. 



A. a. aloha is always dextral. It is plentiful in a limited 

 locality on one ridge, which is isolated by perennial streams 

 on both sides, and mauka is shut in by the precipitous side of 

 the main Koolau range. This station is marked 10 on the map, 

 p. 277. 



Mr. Spalding thinks that connecting forms with apicata 

 may perhaps turn up on the upper Helemano-Poamoho ridge, 

 when it comes to be explored. At present, A. a. aloha is quite 

 isolated. It is a much less solid shell than A. a. vespertina, 

 which is not nearly related. 



