OCR Text |
Show 310 MR. T. DAVIDSON ON JAPANESE BRACHIOPODA. [Apr. 18, correct; for it bears no resemblance to that species, and is a true Rhynchonella, and approaches most in shape and surface to some small examples of tbe Tertiary Rhynchonella bipartita oi Broechi, and almost represents that species in the living state. In this last remark Mr. Jeffreys concurs with me. Hab. Dr. Gould's specimens were dredged off the Japan coast, 30° 35' N., 130° 40' E., in 110 fathoms, sand, by Captain Stevens of the 'Hancock.' Mr. A. Adams obtained it at Satanomosaki, 55 fathoms, and at Gotto in 48 fathoms. Family LINGULID_E, Cuvier. Genus LINGULA, Brug. Mr. Dall has proposed a genus Glottidia, in which he has placed some of the species formerly classed with Lingula ; but even now the number of recent so-termed species referred to the last-named genus are too numerous, and will require to be carefully studied and monographed. The genus Lingula made its first appearance in the Lower Silurian rocks; and some of its fossil forms bear much general resemblance to one or two of the species now found alive, but are of course specifically distinct. Mr. A. Adams has dredged in the waters of Japan four species, which appear to be tolerably distinct. LINGULA TUMIDULA, Reeve. (Plate XXX. fig. 1.) Lingula tumidula, Reeve, Conch. Icon. sp. 2; A. Adams, Annals and Mag. of Nat. Hist. 3rd ser. vol. xi. p. 100, 1863. I have seen but one Japanese specimen, attributed by Mr. Adams to Mr. Reeve's species. It is, however, a smaller shell, of a light yellow colour, with a reddish-brown spot near the beak. Exteriorly the shell is marked with a considerable number of close, almost equidistant, minute concentric projecting lines of growth, somewhat similar to those we see in Lingula scotica from the Carboniferous period. Hab. From the mud of Tsaulian harbour, in the Korean archipelago, 7 fathoms. LINGULA SMARAGDINA, A. Adams. (Plate XXX. fig. 2.) Lingula smaragdina, A. Adams, Annals & Mag. of Nat. Hist. 3rd ser. vol. xi. p. 101, 1863. It is of a bright green colour, whitish in the middle and near the beaks. Length 10, width 4 lines. It most resembles L. hirundo Reeve. Hab. Was found by Mr. A. Adams at Yobuko, 10 fathoms, mud and also in the China sea. LINGULA DUMORTIERI, Nyst. (Plate XXX. fig. 3.) Lingula dumortieri, Nyst, Coq. et Polyp. Foss. de la Belgique p. 337, pl. xxxiv. fig. 4, 1843. & 4 ' Lingula, jaspidea, A. Adams, Annals and Mag. of Nat Hist 3rd ser. vol. xi. p. 101, 1863. |