| OCR Text |
Show 1893.] SHELLS FROM BRITISH CENTRAL AFRICA. 635 7. ACHATINA sp. inc. Hab. Angoni-Land (A. Whyte). A number of specimens of two species of Achatina occur in the collection; they are all, however, in too bad a condition for identification. One is very like A. tavaresiana, Morelet, from Angola; the other is considerably larger and rather like the form of Reeve's figure of A. fulica (Conch. Icon. pi. 2. f. 8). 8. AMPULLARIA OYATA, Olivier. Hab. Sumbu, Itawa, S.W. side of Lake Tanganyika (R.Crawshay). This Nilotic species has already been recorded from the lake (P. Z. S. 1880, p. 348). 9. LANISTES SOLIDUS, Smith. Hab. Karonga, west shore of Lake Nyasa (R. Crawshay). One dead specimen. 10. LANISTES AFFINIS, Smith. Hab. With the preceding (Crawshay); Angoni-Land (Whyte). In dead condition from Karonga. The large number of specimens from Angoni-Land are all small or only half-grown. 11. LANISTES NYASSANUS, Dohrn. Hab. Angoni-Land, south-west end of Lake Nyasa (A. Whyte). _ The eight specimens of this fine species are all in a worn condition and were evidently picked up dead upon the shore. 12. LANISTES OVUM (Peters MS., Troschel). Hab. Kabwiri, Lake Mweru (R. Crawshay). This species was originally described from Mozambique, and although quoted from Lake Nyasa I have not yet seen specimens from there myself. 13. VIVIPARUS TANGANYICENSIS (Smith). Hab. Sumbu, Itawa, S.W. end of Lake Tanganyika (R. Crawshay). Some of the specimens from this locality are remarkably tabulated, as in Bourguignat's figure (Ann. Sci. Nat. 1890, vol. x. pi. iii. fig. 1), and the body-whorl is even more strongly keeled at the periphery. The eight so-called species of Neothauma figured by Bourguignat must be regarded as varieties of this variable form. The nomenclature of this genus has been fully discussed of late by Mr. Dall1, but his conclusions, to my mind, are open to objection. In the first place, I would point out that Martini was not a binomial author, excepting in occasional or chance instances, and therefore that such chance names as he may have given cannot be accepted. 1 Trans. Wagner Free Inst. Sci. Philad. 1892, vol. iii. pt. 2, pp. |
