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Show 12 MR. H. ADAMS ON SHELLS FROM MAURITIUS. [Jan. 9, River at Pointe a Larree, on the east coast; rivers and fresh of the Cape of Good Hope. 16. GERRES LINEOLATUS, Giinth. 17. CHROMIS NILOTICUS, Hasselq. 18. ARIUS FALCARIUS, Richards. 19. LUTODEIRA CHANOS, Forsk. 20. ELOPS MACHNATA, Forsk. 21. ELOPS CYPRINOIDES, Gm. 22. ANGUILLA JOHANNAE, Giinth. 4. Further Descriptions of New Species of Shells collected at Mauritius by Geoffrey Nevill, Esq. By H E N R Y ADAMS, F.L.S. (Plate IV.) STOMATIA VARIEGATA, H. Ad. (Pl. IV. fig. 1.) S. testa subrimata, ovato-oblong a, convexa, transversim costata, costis subdistantibus, interstitiis longitudinaliter striatis, albo variegata ; spira prominula, apice acuto, sutura distincta; anfr. 3\, convexis; apertura ovali, labio calloso, labro ultimum anfractuum paulum ascendente. Long. 9, lat. 7 mill. Hab. Mauritius. Discus VORTICELLA, H. Ad. (Pl. IV. figs. 2, 2a.) D. testa aperte umbilicata, subdiscoidea, tenui, oblique confertis-sime costulato-striata, fulva; spira vix elevata, sutura distincta ; anfr. 4\, convexis, ultimo antice non descendente, superne subdepresso; umbilico perspective, ^ diametri fere eequante; apertura obliqua, rotundato-lunari; perist. simplici, recto, marginibus conniventibus, columellari vix dilatato, dextro subsinuato. Diam. maj. 2\, min. 2, alt. | mill. Hab. Bamboo, Mauritius. NANINA (ROTULA) CERNICA, H. Ad. (Pl. IV. fig. 3.) N. testa imperforata, trochiformi- depress a, tenuissima, membranacea, oblique longitudinaliter striata, lineis spiralibus minutis decussata, corneo-luiescente; spira depresso-conica, apice sutura leviter impressa; anfr. 4, planatis, ultimo acute carinato, basi convexo; apertura diagonal! |