306 MR.T. DAVIDSON ON JAPANESE B R ACHIOPODA. [Apr. 18, 



first noticed by Sir C. Lyell 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 183/ 

 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 com- 

 plete figure of the interior of the dorsal valve from a Japanese spe- 

 cimen 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, Spitz- 

 bergen, 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 

 £39 fathoms ; off Cape St. Vincent, on the coast of Spain, 292 fa- 

 thoms {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 TJddevalla Fossils," published in the proceedings of the 

 British Association. Mr. Dall had inadvertently referred this species 

 to liis 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 recep- 

 tion 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 XXX. fig. 22). 



Lahtjeus rubella, Sow., sp. (Plate XXX. figs. 18-22.) 



Terebratula rubella, Sow. Thesaurus Conchyliorum, vol. i. p. 350, 

 pi. 69. figs. 40, 41, 42, 1846. 



Waldheimia cranium, A. Adams (but not of Muller), 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, pi. 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 oppor- 

 tunity 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 



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