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Show 1871.] MR. T. DAVIDSON ON JAPANESE BllACHIOPODA. 31 1 Of the recent shell I have seen only one example, which had been dredged by Mr. A. Adams at Mososeki, in 7 fathoms, mud bottom. It is of an elongated oval shape, about 9 lines in length by 5 in breadth, tapering towards the front, and is of a warm yellow-brown colour. Mr. Jeffreys is of opinion that this Lingula cannot be specifically distinguished from Lingula dumortieri from the Coralline Crag of Suffolk and of Belgium by any one character. He has compared it with three specimens of the latter, but in every one, where the outline and beak was complete, these exactly agreed with the Japanese recent species. All (both fossil and recent) have peculiar though slight and almost microscopic and close-set longitudinal lines, which, of course, are more distinct in the fossil than in the recent shell. LINGULA LEPIDULA, A. Adams. (Plate XXX. fig. 4.) Lingula lepidula, Adams, Annals & Mag. of Nat. Hist. 3rd ser. vol. xi. p. 101, 1863. This is a small oval-shaped species, tapering a good deal at the beaks, about 4 lines in length by 2 in breadth. In colour it is yellowish, slightly tinted with green. Mr. Adams observes that it is as small as L. semen, and shaped like L. ovalis. Hab. Mr. A. Adams dredged several examples in the inland sea, or, as the Japanese call, it Seto-Uchi (Akasi) in ten fathoms, mud. Family CRANIID^E, Dav. Genus CRANIA, Retz, 1781. Mr. Jeffreys informs me that it was Philipsson, and not Retz or Retzius, who first proposed the generic name of Crania (' Disser-tatio historico-naturalis, sistens nova Testaceorum genera:' Lundae, 1788). But Mr. Dall assures me that Retz had done so some years before Philipsson. CRANIA JAPONICA, A. Adams. (Plate XXX. figs. 6, 6a.) Crania japonica, Adams, Annals & Mag. of Nat. Hist. vol. xi. p. 100, 1863. This is a small species, in which the central pair of muscular prominences are very much developed. All the valves found by Mr. Adams are a little worn. Hab. From deep water, 71 fathoms, among the Gotto group of islands. Family DISCINID_E, J. E. Gray. Genus DISCINA, Lamarck. DISCINA STELLA, Gould. (Plate X X X . fig. 5.) Discina stella, Adams, Annals & Mag. of Nat. Hist. 3rd ser. vol. xi. p. 100, 1863. Hab. Seto-Uchi (Akasi), 17 fathoms; Tsu-Sima, 17 fathoms; Tabu-Sima, 26 fathoms, on coral bottom; Tou-Sima, in 25 fathoms. |