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Show 1893.] NEW SPECIES OF PLEUROTOMIDJE. 489 haud rostratus, spiraliter liratus; apertura oblonga, latiuscula; columella callosa ; labrum acutum, late et profunde sinuatum. Long. 20, maj. diam. 8 millim. Hab. Mauritius. This species belongs to the Clavus group. It has been placed in various collections as P. cdbicostata, Sowerby, with which I find, however, it has little affinity. It comes rather nearer to P. obliquata, Reeve. PLEUROTOMA KEENI, n. sp. (Plate XXXVIII. figs. 13, 14.) Testa turrita, solida, pallide fusca, nigro-fusco strigata, granulata ; spira acuminata (apice ?); anfractus obtuse angulati, costis numerosis confertis, longitudinalibus subobliquis biseriatim granulatis muniti ; interstitiis nigro-fusco strigatis anfractus ultimus supra angulum leviter concavus, infra angulum convexiusculus, infra medium leviter attenuatus, haud rostratus; apertura oblonga; columella callosa, alba, polita labrum fere rectum, supra angulum mediocriter sinuatum. Long. 24, maj. diam. 5 millim. Hab. ? (ex coll. Keen). A species of somewhat remarkable character, apparently belonging to the section Crassispira. The ribs are beaded with white granules and bordered with dark brown streaks. The specimen has lost several whorls of the spire. PLEUROTOMA HUNGERFORDI, n. sp. (Plate XXXVIII. figs. 1, 2.) Testa anguste turrita, grisea, ad apicem fusca ; spira elongata, acuta ; anfractus 8, Iceves, supra medium leviter concavi, infra, costis paucis Icevigatis muniti ; anfractus ultimus breviusculus, supra medium obtuse angulatus, inferne levissime attenuatus, haud rostratus ; apertura oblonga, latiuscula ; labrum acutum, sinus prqfundiusculus, mediocriter latus. Long. 12|, maj. diam. 4 millim. Hab. Hong Kong. A very simple shell, without sculpture, and with but few smooth longitudinal ribs. It is hardly possible to say in which section this species should be placed, whether it is a Brillia or a modification of Clavus. PLEUROTOMA INFRAFUSCA, n. sp. (Plate XXXVIII. figs. 5, 6.) Testa acuminata, albida, antice rufo-fusca ; spira turrita, anfractus 10, primi 2-3 Iceves, sequentes angulati, supra angulum concavi, infra vix convexi, costis numerosis rotundatis, ad angulum elevatis muniti, maculis minutis fuscis angulumpicti ; anfr. ultimus spiram subcequaliter longus, multo latior, basin versus leviter attenuatus, haud rostratus ; apertura latiuscula ; labrum acutum, vix sinuatum, canali brevissimo. Long. 19, maj. diam. 7 millim. Hab. Mauritius ? (ex coll. Sir D. Barclay). The most striking character of this species is its bright reddish- |