No. 2314. 



LIST OF RECENT BRACHIOPODA—DALL. 



333 



The variety was described in the Proceedings of the U. S. National 

 Museum^ from beach drift collected by C. R. Orcutt at San Diego, 

 California. It differs from the normal type by having fine radiating 

 lines on the upper valve. 



PLATIDIA JAPONICA, new species. 



Shell resembling P. seminula but much larger, the valves when 

 normally developed relatively wider, the foramen entirely confined 

 to the attached valve, the free valve having the apex entire and a 

 very narrow long fiattish area on each side ; the soft parts, so far as 

 could be determined from a dry specimen softened in weak liquor 

 potassae, do not differ in arrangement from the Mediterranean 

 species. Height 5.3, width 7.5, diameter 1.3 mm. 



Type locality. — Off Hondo, Japan, in 65 fathoms. 



The Yokohama specimen was adhering to the shell of Terehratulina 

 crossei Davidson. 



Type.— Ca,t. No. 110966, U.S.N.M. 



Subfamily Muhlfeldtiinae. 



Genus MtHLFELDTIA Bayle. 



Megerlio. King, Permian Foss., pp. 81, 145, 1850. — Davidson, Men. Rec. Brach., 



pt. 2, p. 103, 1887 (section "A" only). 

 Megerlea Davidson, Introd. Brach., p. 129, 1856. 

 Megerlia Dall, Amer. Journ. Conch., vol. 6, p. 129, 1871; not of Robineau 



Desvoidy, 1830. 

 Muhlfeldtia Bayle, Journ. de Conchyl., vol. 28, 1880, p. 240. 



Type. — Anomia truncata Linnaeus. 



mUhlFELDTU DISCULUS Pallas. 



Anomia discuhis Pallas, Misc. ZooL, p. 184, pi. 14, fig. 1 a-g, 1766. 



Anomia truncata Linnaeus, Syst. Nat., ed.l2, p. 1152, 1767. — Born, Mus. Vindob., 



p. 118, pi. 6, %. 14, 1778. 

 Terebratula truncata Retzius, Diss. Nov. Gen. Test., p. 14, 1788. 

 Delthyris truncata Anton, Verz. Conch., p. 22, 1839. 

 Orthis ohlita Michelotti, Foss. Mioc. Ital., pi. 1, fig. 21, 1847. 

 Megerlia truncata King, Permian Foss., p. 140, 1850. — Davidson, Ann. Mag. 



Nat. Hist., ser. 2, vol. 9, p. 369, 1852; Mon. Rec. Brach., pt. 2, p. 103, pi. 



19, figs. 11-20, 1887. 

 Muhlfeldtia truncata Fischer and Oehlert, Expl. Travailleur et du Talisman, 



p. 80, 1891. 



Type locality. — Mediterranean. 



1 Vol. 8, p. 551, Sept. 30, 1885. 



