1873.] NEW SPECIES OF ACH ATINELLIN^ . g\ 



Station. On trees. 



Habitat. Kalaikoa and Ahonui, on Oahu ; very rare in Wahiawa 

 ana Helemano. 



Affinities. It seems to be intermediate between A. decorus Fer 

 and A. apicatus, Nwc. ' *' 



Remarks This species is very rarely dextral. The specimen 

 figured is from Ahonui. ^ 



Apex tuberans, Gk. (Plate X. fig. 3.) 



Testa dextrorsa, globoso-conica, nitida, incrementi lineis (haud spira- 

 libus) striata, cinereo strigata, zonis pluribus albidis niaro-fuscis- 

 queinterrupta; sutura marginata, pallida ; anfract. 6, primi Z 

 albidi, convexiusculi, cceteri convexi ; spira concava ; apertura 

 alba ; perist. ahquanto dilatatum, intus incrassatum, dilute roseo- 

 fusco tinctum- plica columellaris valida, albida. 



Long. 20 mill., diam. 13|. 



Var. o. Testa alba, fusco luteoque varie zonata. 



\ ar. (3. Tesla subflava, nigro-fusco crebre zonata. 



Station. On trees and shrubs. 



Habitat. The metropolis of the species is Kalaikoa, on Oahu 



f,^w\ n /i°? U,; andsin S le specimens have been brought 



from VVahiawa and Helemano. ° 



Affinities. It is most nearly allied to A. iavidus, Gk 



Remarks Th>s is a dextral species. Sinistral forms are found 



only in a tew specimens passing into other species. 



Apex polymorpha, Gk. (Plate X. fig. 5.) 



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

 Imeis {hand spirahbus) striata, dilute brunnea, zonis pluribus 

 strigisque cyaneo-nigris ornata, zona lata nivea ad peripheriam 

 cincta ; sutura leviter marginata, brunnea ; anfract. 6, primi 4 

 convexiusculi albidi, cateri convexi ; spira leviter concava ,■ aper- 

 tura alba ; perist. margine brunneo tinctum, intus incrassatum ■ 

 plica columellaris valida, albida. 



Long. 1/ mill., diam. 12. 



Var. a. Testa cervina, sutura brunnea. 



Var. (3. Testa alba, zonis paucis basique brunneis ornata ; sutura 

 brunnea. 



Station. On the leaves of the ohia and other trees 



Habitat The typical forms are found in Waipio and Wahiawa on 



Oahu. Varieties are sometimes found in Kalaikoa and Ahonui 

 Affinities It is most nearly allied to A. versicolor, Gk., and A 



tuberans, Gk. 



Remarks. In Waipio and Wahiawa two thirds of the specimens are 

 dextral, in Ahonui and Kalaikoa only about one eighth are dextral. 

 The specimen figured is from Waipio. 



Apex turbiniformis, Gk. (Plate X. fig. 7.) 

 Testa dextrorsa, subperforata, subgloboso-conica, parum nitida, in- 

 crementi lineis {haud spiralibus) striata; alba, lineis paucis 

 Proc. Zool. Soc— 1873, No. VI. 6 



