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Show 306 MR.T. DAVIDSON ON JAPANESE BHACHIOPODA. [Apr. 18, first noticed by Sir C. Lvell in his paper on the rising of Sweden (Phil. Trans, p. 36, tab. 2. figs. 32, 33, 1835), but that eminent geologist did not apply to it any specific denomination. In 1837 Hisinger confounded it with T. caput-serpentis; and in his memoir, • Bidrag till Spitzbergens Molluskfauna,' p. 121, tab. i. fig. 1, 1859, Prof. O. Torell gave an incomplete illustration of its loop. I have therefore availed myself of the present opportunity to add a complete figure of the interior of the dorsal valve from a Japanese specimen of the species. Hab. This shell was detected by myself among some specimens dredged by Mr. A. Adams at Satanomosaki in 55 fathoms. Mr. Jeffreys has also furnished me with the following list of localities where the species has been found:-Hornsund and Bellsund, Spitzbergen, 40-80 fathoms (Torell); Wellington Channel (Belcher); Shetland, 35 miles N.N.W. of Unst, 90-100 fathoms; Channel slope, about 185 miles from Cape Clear and Ushant, and 165 miles from the Scilly isles, 358 fathoms, living attached to a piece of coral, Lophohelia perforata; Channel slope, not far from last locality, in 539 fathoms; off Cape St. Vincent, on the coast of Spain, 292 fathoms (Jeffreys). It has also been recorded from Spitzbergen by Goodsir, and by P. P. Carpenter from Murray Bay, Gulf of St. Lawrence. Mr. Jeffreys mentions it likewise in his paper entitled "Report on Cddevalla Fossils," published in the proceedings of the British Association. Mr. Dall had inadvertently referred this species to his subgenus Magasella, but is now of opinion that it should be left where I had originally placed it in 1845. Subgenus LAQUEUS, Dall. This is a subgenus recently proposed by Mr. Dall for the reception of shells which, like T. californica, Koch, and T. rubella, Sow., have the reflected part of the loop attached by two lateral processes, not to the septum nor to the septal processes, but to the haemal portions of the loop (Plate X X X . fig. 22). LAQUEUS RUBELLA, SOW., sp. (Plate XXX. figs. 18-22.) Terebratula rubella, Sow. Thesaurus Conchyliorum, vol. i. p. 350, pl. 69. figs. 40, 41, 42, 1846. Waldheimia cranium, A. Adams (but not of Miiller), Annals and Mag. of Nat. Hist. vol. xi. 3rd ser., Feb. 1863. Laqueus suffusa, Dall, n. sp. ?, American Journal of Conch, vol. i. part 2, p. 125, pl. 7. figs, g, h, s, 1870. This is an important Japanese species; it varies much in shape and coloration, and especially so with age. Having had an opportunity of examining a rather large series of specimens, I believe myself justified in stating that the L. suffusa of Dall is a half-grown example of Sowerby's species. Mr. Jeffreys and myself have also ascertained that the shell referred by Mr. A. Adams to W. cranium from Japan, belongs likewise to the species under description. When young, L. rubella has an oblong-ovate shape, tapering and |