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Show 1873.] NEW SPECIES OF ACHATINELLINCE. 81 Station. On trees. Habitat. Kalaikoa and Ahonui, on Oahu; very rare in Wahiawa and Helemano. Affinities. It seems to be intermediate between A. decerns, 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 spiralibus) striata, cinereo strigata, zonis pluribus albidis nigrofuscis-que interrupta ; sutura marginata, pallida ; anfract. 6, primi 3 albidi, convexiusculi, cceteri convexi; spira concava; apertura alba; perist. aliquanto dilatatum, intus incrassatum, dilute roseo-fusco tinctum; plica columellaris valida, albida. Long. 20 mill., diam. 13|. Var. o. Testa alba, fusco luteoque varie zonata. Var. 3. Testa subflava, nigro-fusco crebre zonata. Station. On trees and shrubs. Habitat. The metropolis of the species is Kalaikoa, on Oahu. It is also found in Ahonui ; and single specimens have been brought from Wahiawa and Helemano. Affinities. It is most nearly allied to A. flavidus, Gk. Remarks. This is a dextral species. Sinistral forms are found only in a few specimens passing into other species. APEX POLYMORPHA, Gk. (Plate X. fig. 5.) Testa dextrorsa, subperforata, globoso-conica, nitida, incrementi lineis (haud spiralibus) 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, cceteri convexi; spira leviter concava ; apertura alba ; perist. margine brunneo tinctum, intus incrassatum; plica columellaris valida, albida. Long. 17 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, incrementi lineis (haud spiralibus) striata; alba, lineis paucis P R O C ZOOL. Soc-1873, No. VI. 6 |