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Show 1871.] MR.T. DAVIDSON ON JAPANESE BRACHIOPODA. 305 This beautiful species has been well described by Adams and Schrenck. It varies considerably in shape and colour, so much so, indeed, that Dr. Schrenck has proposed to distinguish some of its shapes by the designations of Forma normalis, Forma longior, and Forma latior ; but all these variations merge one into the other when we examine a large series of specimens. Some young and middle-aged examples are of a light yellow colour radiated with red. Other specimens present a uniform red colour, especially deepened in tint near to, and at, the concentric lines of growth. Some examples have also attained to 2 inches in length, with a slightly greater breadth. Hab. Dr. Schrenck states this shell to be the most common of all the Brachiopoda in the sea of North Japan. Mr. A. Adams obtained it abundantly in 7 fathoms, along with W. grayi, at Hakodadi, also off Okerisi Island in 25 to 35 fathoms, six miles distant from the shore, and from a bottom of coral and rock. It occurs also at a depth of 48 fathoms in the Straits of Korea and in several other parts of the Korean archipelago. A yellow Terebratula (Plate X X X I . fig. 6) was sent to me by Mr. A. Adams as a yellow variety of T. coreanica, and as having been dredged at Hakodadi; but I feel considerable uncertainty as to its being thus correctly identified. The loop was unfortunately entirely broken, so that I could not ascertain its internal characters. In external shape it much resembles some young examples of Waldheimia venosa or of Terebratella pulvinata. I will not, therefore, venture upon a specific identification, but have given a figure of the shell in the hope that it may be hereafter properly identified. TEREBRATELLA MARINE, A. Adams. (Plate XXX. figs. 15, 16, 17.) Terebratella marice, Adams, Annals & Mag. of Nat. Hist. 3rd ser. vol. v. p. 412, M a y 1860; and Annals, 3rd ser. vol. xi. Feb. 1863. This pretty and very interesting little species was correctly described by Mr. A. Adams. It is a very important shell, as it nearly approaches in shape and character to the Pliocene species from Sicily, described by Seguenza as the Terebratella septata of Philippi. It is of a pure white colour, with numerous delicate concentric lines of growth. None of the specimens found by Mr. Adams seems to have exceeded some 6 lines in length by 4 in breadth. It is considered by Mr. Jeffreys the living representative of the Sicilian fossil species; but this last attained much larger proportions, and would appear to be more finely punctuated than is the Japanese shell, so that I should not like to affirm the positive identity of the two shells, although Mr. Jeffreys may be correct in his conclusions. Hab. Uraga, 21 fathoms; Gotto, 48 fathoms; Satanomosaki, 55 fathoms. TEREBRATELLA SPITZBERGENSIS, Dav. (Plate XXX. figs. 13, 14.) This well-known species, according to Torell, seems to have been PROC. ZOOL. Soc-1871, No. XX. |