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Show 586 MR. EDGAR A. SMITH ON LAND-SHELLS [May 2, acute albo-carinatus, infra convexiusculus; apertura obliqua, angulatodunata ; peristoma tenue, margine columellari superne late refiexo, umbilicum semiobtegente. Diam. maj. 8| millim., min. 8, alt. 9. Hab. Mount Chiradzulu. Var. anfractibus convexioribus, ultimo ad peripheriam angustiore. Hab. Masuku Plateau, 6000-7000 feet. 25. BULIMINUS (RHACHIS) STICTUS Martens. Bulimus (Rhachis) stictus, Martens, Mai. Blatt. 1859, vol. vi. p. 211, pl. ii. fig. 6. Hab. T$y2L$?ddind(Kirk andWhyte); Tette, Mozambique (Martens). Of four specimens from Nyasaland only one has the two pale rosy bands of the type. Martens describes the four apical whorls as uniformly yellow, whereas all the specimens I have examined have in these whorls a black zone just above the suture. 26. BULIMINUS (RHACHIS) BOHMI Martens. Bulimus (Rhachis) bohmi, Martens, Nachr. Deutsch. mal. Gesell. 1895, p. 181 ; Beschalte Weichth. Deutsch-Ost-Afrikas, p. 70, pl. iii. fig. 39. Hab. Mount Chiradzulu, 5000 feet. The specimens in the present collection are rather smaller than the type, which was obtained further north on the east side of Lake Tanganyika. The largest specimen is only 19 millim. in length. 27. BULIMINUS (RHACHIS) CHIRADZULUENSIS, sp. nov. (Plate XXXIII. fig. 40.) Testa ovato-conica, tenuis, vix perforata, straminea, lineis duabus fuscis circa medium anfractus ultimi ornata, nitens, lineis incrementi tenuibus obliquis striata ; spira conica, versus apicem mediocriter obtusum sordide rufescens; anfractus sex, con-vexiusadi, ultimus in regione umbilici pellucidus; apertura irregulariter ovata, longit. totius k cequans; intus bilineata; peristoma tenue, margine columellari anguste refiexo, appresso, rimam inconspicuam formante. Longit. 13^ millim., diam. 8|. Hab. Mount Chiradzulu. Allied to B. usagaricus Smith, but thinner, yellower, with a narrower perforation and a differently reflexed columella. I cannot agree with Dr. von Martens in considering B. usagaricus a variety of B. melanacme of Pfeiffer. 28. BULIMINUS (CONULINUS) NYASANUS, sp. nov. (Plate XXXIII. figs. 41, 42.) Testa globoso-ovata, tenuis, umbilicata, pallide fuscescens, sub-pellucida, oblique tenuiter costulato-striata; spira conica, apicem subplana ; anfractus 6, superiores 2\ (protoconcham formantes) convexiusculi, spiraliter fortiter lirati, cceteri convexi, ultimus globosus, haud descendens ; apertura subperpendicularis |