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Show 1870.] MR. H. ADAMS ON NEW SHELLS. 5 " Mr. Gurney observes that the specimens now exhibited 'appear to be male and female of the true A. ncevioides, identical with those found in Africa. I have never seen this larger race from India previously, or, at least, have never recognized it if I have seen it. " 'The occurrence of these two birds in India raises a curious question of nomenclature. __. ncevioides is undoubtedly far more "fulvescens" in its average plumage than the allied smaller Indian race, which you and I have been in the habit of identifying with Aquila fulvescens of Gray. " ' But as it now seems that the true A. ncevioides occurs in India, is it not most probable that A. fulvescens, Gray, is in reality a synonym of A. ncevioides, and that the smaller allied but less fulvescent bird, which is peculiar to India, should be termed Aquila vindhiana of Franklin, without the synonym of A. fulvescens V " I also exhibit a singular specimen, received from Mr. Brooks at the same time, which Mr. Gurney considers to be a female of A. vindhiana of an unusually dark colour, attributable to the plumage being newly acquired after a recent moult. This bird has been considered by Mr. A. H u m e to be A. neevia, and by others A. hastata." The following papers were read :- 1. Descriptions of a New Genus, and of Eighteen New Species of Mollusks. By H E N R Y A D A M S , F.L.S. (Plate I.) Genus NESTA, H. Ad. Testa oblongo-ovali, superne convexa, apice terminali, subincurvo, extus decussata, sulco dorsali in fissuram desinente; apertura margine crenulato. NESTA CANDIDA, H. Ad. (Plate I. figs. 1, 1 a.) N. testa oblongo-ovali, tenui, lirulis elevatis tenuissimis concentricis et radiantibus concinne decussata, nivea; sulco dorsali lateribus distinctis, transverse striato, fissura antica valida; apertura margine postico paulum incrassato, omnino delicate crenulata. Long. 5\, lat. 3, alt. If mill. Hab. Rea Sea (Coll. M'Andrew). This pretty and delicate little form appears to be allied to Zeidora, A. Ad.; but the peculiar internal septum, which is a marked characteristic of that genus, is absent in Nesta. It may be considered a communicating link between Zeidora and Emarginula. The genus Zeidora was obtained by m y brother in Japan, where also he met with another singular shell, Morchia obvoluta, of which two specimens have been dredged by Mr. M'Andrew in the Red Sea. |