Reviews—Seismology in Japan. 515 
Phil. Journ. 1825 as Modiolus sp., and in 1828 in his British Animals 
as Mytilus crassus, and was referred by King, “ Permian Fossils,” 
p- 159, to Myalina, in which he was followed by Huxley and Htheridge, 
Cat. Foss. Mus. Pract. Geol. p. 110, 1865; by Armstrong and 
Young, Cat. Carb. Foss. W. Scot., 1871; Capt. Brown referred 
to it as Avicula, Foss. Conch., 1849. 
Salter, in Geol. Surv. Mem. Iron Ores of S. Wales, p. 228, in 
mentioning those Mytiliform shells now known as Anthracoptera, 
hazarded the name Myalina, which he subsequently altered to 
Anthracoptera, Geol. Surv. Mem. Country around Wigan, 1862, on 
account of the “absence of the striated hinge-plate of Myalina,” a 
character which I have shown (Quart. Journ. Geol. Soc. vol. xlix. 
1893, pl. vii. figs. 1, la, 1b, 2, 2a) they possess. 
And indeed there is no one anatomical point in the shells of the 
so-called Myalina crassa which differs from those of Anthracoptera. 
Meek and Worthen, in the Geological Survey of Illinois (Paleon- 
tology), refer the Mytiliform shells of the Coal-measures to Myalina, 
and Barrois, in his ‘‘ Recherches sur les terrains anciens des Asturias 
et de la Galice,” p. 334, remarks on the close resemblance between 
Anthracoptera (Salter) and Myalina, and thinks it impossible to 
distinguish between them. He describes Myalina triangularis and 
carinata from Spanish beds, and considers that J/yalina is synony- 
mous with Anthracoptera. . 
The Myalina crassa and various forms of Anthracoptera belong 
therefore, I believe, to the same genus, which I think can be 
separated from the true Myalinas of the Permian by the absence of 
rostral myophores and the umbones not being terminal. 
I propose to substitute the name Anthracoptera crassa for that of 
Myalina crassa. The fauna of the bed in which it occurs at Cults 
is interesting, bearing on the salt or brackish origin of these beds. 
I find it associated there with Spirorbis carbonarius, Stigmaria, scales 
of Megalicthys, rolled corals, Zaphrentis, Aviculopecten and Hncrinite 
remains. Mr. Etheridge mentions its occurrence with Schizodus 
and other marine forms at other places in Scotland. 
I am able to give another locality for this shell, viz. Beith, Ayrshire, 
on the authority of Messrs. Young and Armstrong. 
DSe) 22H WW JE AE WA Se 
——o— 
J.— TRANSACTIONS OF THE SEISmMoLOGIcAL SociETY oF JaPaN, vol. 
xvi. 1892. pp. 120. 
Contents:—(1) C. A. W. Pownall: Notes on recent publications relating to the 
effect of earthquakes on structures, 1. (2) C. A. W. Pownall: Appendix to the 
above notes, 14. (3) S. Sekiya and F. Omori: Comparison of earthquake measure- 
ments made in a pit and on the surface-ground, 19. (4) J. Milne: A mantel-piece 
seismometer, 47. (5) W. K. Burton: Notes on seiches observed at Hakone Lake, 
49. (6) F. Omori: A note on diagrams from seismographs recording vertical motion, 
53. (7) J. Milne: [Epitome of the] Report of the Chirikioku (Meteorological 
Department) in Tokio on seismometrical observations made in Japan during the year 
1888, 55. (8) J. Milne: ditto, during the year 1889, 81. (9) Obituary notice, His 
Majesty David Kalakaua, 119. 
