DR. T. DAVIDSOTV ON EECENT BRACHIOPODA. 235 



Family DISCINID.E, Gray, 1840. 



XIX. Genus Discina. Lamarck, 1819. 



Discina striata, Schumacher, sp., 1817, = D. osfreoides, Lamarck, 1819, = Z). radiosa, Gould, = _D. Evansi, 

 Davidson. 



XX. Subgenus Discinisca, Dall, 1871. 



Discinisca Iceins, Sowerby, sp., 1818. 



D. lamellosa, Broderip, sp., 1835. 



D. Cumingii, Broderip, sp., 1835, = Z). strigata, Broderip. 



D. tenuis, Sowerby, sp., 1847. 



D. atlantica, King, sp., 1868. 



D. Stella, Gould, 18G0. 



Uncertain Species. 



Discinisca antiUarum, d'Orbigny, 1853. 



Family LINGULID^. 



XXI. Genus Lingula, Bruguicre, 1789. 



Lingula anatina, Bruguiere, sp., 1789, = A. anatis, unguis, lingun, Chemnitzi, histula, = affinis Hancock. 



L. Murphiana, King, MS., Mus. Cuming; Reeve, 1859, = a«a/i«a Hancock. 



L. tumidula. Reeve, 1841. 



L. Mans, Swainson, 1823. 



L, exusta. Reeve, 1859. 



L. jaspidea, Adams, 1863. 



L. Adamsi, Dall, 1873. 



L. Reevii, Davidson, 1880 (dim auctorum L. ovalis). 



Uncertain Species. 

 Lingula smaragdina, Adams, 1863. 

 L. hirundo. Reeve, 1859. 

 L. lepidula, Adams, 1863. 



XXII. Subgenus Glottidia, Dall, 1870, 



Glottidia ulbida. Hinds, sp., 1845. 



G. Palmeri, Dall, 1871. 



G. Audebarti, Broderip, sp., 1835, = !,. pyramidata, Stimpson. 



Uncertain Species. 

 Glottidia? antiUarum, Reeve, sp., 1861. 

 G. ? semen, Broderip, sp., 1835. 



