234 DE. T. DAVIDSON ON EECENT BRACHIOPODA. 



Uncertain Species. 

 ? Cistella lunifera, Philippic sp., 1836. 



« 



Subfamily (not yet determined). 



XIII. Genus ? Gwynia, King, 1859. 



Gwynia capsula, Gwyn Jeffreys, sp. (an immature form) =Terebratula capmla = Argiope capsula, 

 Jeffreys. 



XIV. Genus Platydia, Costa, 1852. 



Plahjdia anomioides (Scaccti), Philijjpi, sp., 184)4:,= Terebratula seminulum, Philippi, 1836, = Morrisia 

 anomioides, Davidson. 



P. Davidsoni, Deslongchamps, sp., 1855. 



Family THECIDIID^. 



[XV. Genus Thecidium, Defrance, 1828. 



Thecidmm mediterraneitm, Risso, 1826, = T. spondylea, Scacclii, = T. testudinaria, Michelotti. 

 T. Barretti, Woodward, MS., 1864. 



Family RHYNCHONELLID^. 



XVI. Genus Rhynciionella, Fischer, 1809. 



Rhynchonella psittacea, Chemnitz, sp., 1785, = var. Woodwardi, Adams, 1863. 

 R. nigricans, Sowerby, 1846, = var. pyxidata, R. B. Watson, MS., 1880. 

 B. cornea, P. Fischer, MS. 1885, =? R. sicula, Jeffreys, nee Seguenza. 

 R. lucida, Gould, 1860. 

 R. Grayi, Woodward, 1855. 

 R. Doderleini, Davidson, 1886. 



XVII. Subgenus Atretia, Gwyn Jeffi-eys, 1870. 



Atretia gnomon, Jeffreys, 1869. 

 A. Brazieri, Davidson, 1886. 



LYOPOMATA, Owen = TRETENTEUATA, King. 



Family CRANIID^. 

 XVIII. Genus Crania, Retzius, 1781. 

 Crania anomala, Miiller, sp., l776, = distorta, Montagu, norvegica, Lamarck, orcadensis, Leach, alba, 

 Jeffreys. 



C. turbinata, Poli, sp., 1795,= C. personata, part., = C'. rostrata et ringens, Hoeninghaus. 

 C. Suessii, Reeve, 1862. 

 C.japonica, Adams, 1863. 



Uncertain Species. 

 Crania Pourtalesii, Dall, 1871. ?Var. of C. anomala. 



