126 



SYNOPSIS OF AMERICAN FOSSIL BRACHIOPODA. 



[bii.i.. 87. 



la''. Subfamily Magellanin^e Beecber, 1893. 



Waldlieimiche (paitiiii) Donvillo, 1880; Tcrebratelliu;i^ and Ma,<xasina> Davidson, 

 1887; Ma<^asida> (i)ar(im) d'Orbij^ny, 1847; King, 1850; Rliyutliorida'- (partial) 

 Kiug, 1850; MiihlfekUiua' n:hlerf,, 1887; Kianssiniiia' Dall, 1«70; Kranssidie 

 Davidson, 1870. 



Teiebratellidie with tbe " loop composed of descending and ascend- 

 iug- brandies, passiiij;- in the higher genera through nietamori>hoses 

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

 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. 



Waldlieimia Kiug, 18o0 (not Brulle, 



1846). 

 Neothyris Douvi]l(<, 1880. 

 Terebratella d'Orbigny 1847. 



Delthyris Mcnke, 1830 (not Dalman, 



1828). 

 Ismenia King, 1850 (not Dall, 1870). 

 Waltouia Davidson, 1850. 



Magasella Dall, 1870. 

 Ehyuchoriua (Ehlert, 1887. 



Magas Sowerby, 181G. 

 Megerlina Deslongchamps, 1884. 

 Bouchardia Davidson, 1840. 



Pachyrhynchns King, 1850. 

 Kraussina Davidson, 1859. 



Kraussia Davidson, 1852 (not Dana, 

 1852). 

 Coeuothyris Douville, 1880. 

 Mannia Dewalque, 1874. 

 1 Rhyuchora Dalman, 1828. 



Superfamily SPIRIFERACEA Waagen, 1883. 

 Helicopegmata Waagen, 1883. 



Telotremata with the adult brachia supported by calcareous spiral 

 lamelke or spiralia. 



1. Family ATRYPID^ Gill, 1871. 



Atrypidaj Dall, 1877. 



Spiriferacea with the crura directly continuous with the primary 

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

 Jugum simple, complete or incomplete. 



la. Subfamily Zygospirin^ Waagen, 1883. 



Anazygidte Davidson, 1884; Zygospiridse Hall and Clarke, 1895. 



Atrypidse with a simple jugum either posteriorly or anteriorly 

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



Zygospira Hall, 18G2. 



Stenocisma Hall, 1864 (not Conrad, 



1839; Hall, 1867). 

 Auazyga Davidson, 1882. 

 Ortlionom;pa Hall, 1858. 

 Hallina Winchell and Schuchert, 



1892. 

 Protozyga Hall and Clarke, 1893. 



Catazj'ga Hall and Clarke, 1893. 

 Atrypina Hall and Clarke, 1893. 

 Glassia Davidson, 1882. 

 ?CliutonellaHall and Clarke, 1893. 



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