SCHrcHEKT.] 



CLASSIFICATION OF TELOTREMATA. 



123 



RensseluTia flail, 1850. 

 Beacliia Hall and (Clarke, 1803. 

 Newberria Hall, 1801. 



Kensselandia Hall, 1867. 

 Oriskaiiia Hall and Clarke, 1803. 

 Trigeria (Bayle, 1875?) Hall and 



Clarke, 1803. 

 ?S('ai>liioc(i'lia Whitfield, 1801. 

 Centroiiella i>illiii<»s, 1850. 



Ciypton.'lla Hall, 1863 (not 1861 and 

 1867). 



Chascothyris Holzapfel, 1805. 

 Selenella Hall and Clarke, 1S03. 

 liomiiigerina Hall and Clarke, 



1803. 

 Juvavella Bittner, 1888. 

 Jnvavellina Bittner, 180(5. 

 Nucleatula (Zngmayer) Bittner, 



1800. 

 Dinarella Bittner, 1802. 

 •?Lissopleura Whitfield, 1806. 



2. Family TEREBKATULID.E Gray, 1840. 



Terebratulas developing- originally a Centronella-like loop, and thence 

 by a short series of nietamorj)hoses resulting at maturity in a free loop 

 of varying form. 



Subfamily Stringocephalin^ Dall, 1870. 



Strinsocepbalidip King, 1850; Davidson, 1853. 



TerebratnlidiP with a "long loop, following the margin of the dorsal 

 valve, not recurved in front. Probably no median coiled arm" 

 (Beecher).^ 



Stringocephalus Defrance, 1827. 



2a. Subfamily Megalanterin^ Waagen, 1882. 



Terebratuliche with a long loop having ascending branches. 



Megalanteris CEhlert, 1887. 



Megantrris Suess, 1855. 

 ?Cryptacanthia White and St. 

 John, 1808. 



Cryptonella Hall (1861 f), 1807. 

 Harttina Hall and Clarke, 1803. 



2a'\ Subfamily Terebratui.in^ Dall, 1870. 



Terebratulida? with a short loop. "A median unpaired coiled arm 

 exists in recent genera" (Beecher). 



Eunella Hall and Clarke, 1803. 

 Crana^na Hall and Clarke, 1803. 

 Dielasma King, 1850. 



Epithyris King, 1850 (not Pbillii)S, 



1841). 

 Seminula ilcCoy, 1855 (not 1844). 



Dielasmina Waagen, 1882. 

 ISTotothyris Waagen, 1882. 

 Zugmeyeria Waagen, 1882. 

 Dictyothyris Douville, 1880. 

 Glossothyris Douville, 1880. 

 Pygope Link, 1830. 



'The ontogenetic hiatory of Stringocephalus is not kno'vm. Its mature loop, however, is so 

 ditTerent from that of the Ceutrouellid» tliat it appears probable that this apjienclage passed tlirough 

 a short series of changes, and therefore the reference of this subfamily to the Tarebratulidai. 



