280 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 57. 



Genus PELAGODISCUS Dall. 



Pelagodiicus Ball, Bull. Mus. Comp. Zool., vol. 43, No. 6, p. 440, 1908.— Allan 

 Thomson, Australasian Antarctic Exp., Brachiopoda, pp. 38, 40, 50, 1918. 



Type. — Disdna ailantica King. Abyssal. 



This form has the peduncular area relatively large and the lower 

 valve outside of it smooth as well as the upper valve. The setae 

 are remarkably long and minutely prickly. 



PELAGODISCUS ATLANTICUS King. 



Discina atlantica King, Proc. Nat. Hist. See. Dublin, vol. 5, pp. 170-73, 1868.— 

 Jeffreys, Ann. Mag. Nat. Hist., ser. 4, vol. 18, p. 252, 1876; Challenger 

 Brach., p. 62, 1880, 



? Discinisca atlantica Dall, Proc. Acad. Nat. Sci. Phila. for 1873, p. 261.— David- 

 son, Mon. Rec. Brach., pt. 3, p. 200, pi. 26, figs. 18-22, 1888. 



Pelagodiscus atlantiais Dall, Bull. Mus. Comp. Zool., pt. 43, No. 6, p. 440, 

 1908.— Allan Thomson, Australasian Antarctic Exp., Brachiopoda, pp. 38, 

 40, 50, 1918. 

 Type locality.— l^oTth Atlantic Ocean in 1,366 fathoms at station 

 19a, Porcupine Expedition of 1869. 



Cat. No. 



111033 



183620 



173621 



173622 



173628 



130339 



52164 



52165 



52166 



38429 



78720 



111034 



35170 



44969 



46147 



78722 



108214 



Locality. 



North Atlantic, 2,100 fathoms 



North Atlantic 



Station 12, Valorous Exp 



Station 13, Valoroiis Exp 



Station 17, Valoroiis Exp 



Off the Azores, 2,995 fathoms 



Southeast of Georges Bank, 1,356 fathoms.. 

 Southeast of Georges Bank, 1,679 fathoms. .. 



East of Georges Bank, 1,710 fathoms 



Off Nantucket shoals, 1,467 fathoms 



Southwest of Nantucket shoals, 1,825 fathoms. 



Off Marthas Vineyard, 1,853 fathoms 



Off Marthas Vineyard, 1,451 fathoms 



Off Marthas Vineyard, 1,525 fathoms 



Off Marthas Vinevard, 1,582 fathoms 



Off Marvland, 1,631 fathoms 



Off Fernandina, Florida, 294 fathoms 



Collector. 



Jeffreys... 

 J. Murray. 

 Jeffreys... 

 Jeffreys... 

 Jeffreys... 

 Talisman. 



B.F 



B. F 



B.F 



B.F 



B. F 



B.F 



B. F 



B. F 



B.F 



B.F 



B.F 



Number 

 of speci- 

 mens. 



1 

 1 

 6 

 1 

 1 

 1 

 1 

 2 



1 V. 

 2 

 2 

 1 

 7 

 4 

 2 

 1 

 2 



This has also been obtained off the Galapagos Islands and off Val- 

 paraiso, Chile, in the Pacific, and is the most cosmopolitan brachiopod 

 known. 



Order PROTREMATA. 

 Family THECIDIIDAE. 



Genus THECIDEA Defrance. 



Theddea Defrance, in Ferussac, Tableau Syst., p. XXXVIII, 1822 (nude 

 name).— Brongniart, in Cuvier, Ossem. foss., ed. 2, vol. 2, pt. 2, p. 325, 

 1822.— Blainvllle, Man., vol. 1, p. 513, 1825.— Deshayes, Diet. Class, d'hist. 

 Nat., vol. 16, p. 215, Oct., 1830. 



Theddium Sowerby, Gen. Shells, fasc. 20, Nov. 1823.— Davidson, Mon. Rec. 

 Brach., pt. 2, p. 156, 1887. 



Theddea Risso. Hist. Nat. Eur. M^r., vol. 4, p. 593, 1826.— Defrance, Diet. 

 Sci. Nat., vol. 53, p. 434, 1828. 



