126 



SYNOPSIS OF AMP:RICAN fossil' BRACHIOPODA. Iiull.87 



la"'. Subfamily MAGELLANiNyE Decclier, 1803. 



WalcIheimicUij (purtim) Dmivill(>, 1880; Teiobrutelliua' aucl Magasiiia' Davidson, 

 1887; Masasida! (partial) d'Orbigny, 1847; King-, 1850; I?l).Yiicliorida>, (partiui) 

 Kiug, 1850; Miihlfeldliua- Q^hlert, 1887; KrauBsiuiiia" J)a]l, 1870; Kraussid* 

 Davidson, 1870. 



Terebratellida' with tlie "loop coinposed of desceuding and asceud- 

 iug branches, passing in the higher genera through inetani()ri>hoses 

 comparable to the adult structure of Bouchardia, Magas, IMagasella, 

 Terebratella, and Magellania. The lower genera become adult before 

 reaching the terminal stages" (Beecher). Recent genera are restri ted 

 to austral seas. 



Magellania Bayle, 1880. 



Waldheimia Kiug, 1850 (not BruUe, 

 1810). 



Neothyris Douvillo, 1880. 

 Terebratella d'Orbigny 1817. 



Delthyris Monke, 1830 (not Dahiiau, 



1828). 

 lameuia King, 1850 (not Dall, 1870). 

 Waltouia Davidson, 1850. 



Magasella Dall, 1870. 

 Ebynchoriua (Ehlert, 1887. 



Magas Sowerby, 1810. 

 Megerlina Deslongchamps, 1884. 

 Bouchardia Davidson, 1849. 



Pachyrhynchus King, 1850. 

 Kraussina Davidson, 1859. 



Kraiissia Davidson, 1852 (not Dana, 

 1852). 

 Ccenothyris Douville, 1880. 

 Manuia Dewalque, 1874. 

 ? Rhynchora Dalman, 1828. 



Superfamily SPIRIFERACEA Waagen, 1883. 

 Helicopegmata Waagen, 1883. 



Telotremata with the adult brachia supported by calcareous spiral 

 lamelhe or spiralia. 



1. Family ATRYPID^ Gill, 1871. 



Atrypid* Dall, 1877. 



ypiriferacea with the crura directly continuous with the primary 

 lamella', which diverge widely and have the spiral cones between them. 

 Jugum simple, complete or incomplete. 



la. Subfamily Zygospirin^ Waagen, 1883. 



Ana/.ygida- Davidson, 1884; Zygospirida; Hall and Clarke, 1895. 



Atrypidie with a simple jugum either posteriorly or anteriorly 

 directed, Spiralia with their apices toward the median dorsal region. 



Zygospira Hall, 1862. 



Stenocisnia Hall, 1864 (not Conrad, 



1839; Hall, 1807). 

 Anazyga Davidson, 1882. 

 Orthononia-a Hall, 1858. 

 Hallina AVinchell and Schiichert, 



1892. 

 Protozyga Hall and Clarke, 1893. 



Catazyga Hall and Clarke, 1893. 

 Atrypina Hall and Clarke, 1893. 

 Glaseia Davidson, 1882. 

 ?CliutonellaHaIl and Clarke, 1893. 



