SCHUCHERT.] 



CLASSIFICATION OF TELOTREMATA. 



123 



EeDSselcieiia Hall, 1850. 

 Benchia Hall and Clarke, 1893. 

 Newberria Hall, 1891. 

 Rensselandia Hall, 1867. 



Oiiskauia Hall and Clarke, 1893. 

 Trigeria (Bayle, 1875?) Hall and 



Clarke, 1893. 

 fScaphioctPlia Whitfield, 1891. 

 Ceiitronella Billings, 1859. 



Cryptonella Hall, 1863 (not 1861 and 

 1867). 



Chascothyris Holzapfel, 1895. 

 Selenella Hall and Clarke, 1803. 

 Romingerina Hall and Clarke, 



1893. 

 Juvavella Bittner, 1888. 

 Jiivavellina Bittner, 189(5. 

 Nucleatula (Zugmayer) Bittner, 



1890. 

 Dinarella Bittner, 1892. 

 ?Lissopleura Whitfield, 189G. 



2. Family TEEEBEATULID^ Gray, 1840. 



Terebratulas developing originally a Centronella-like loop, and thence 

 by a short series of metamorphoses resulting at maturity in a free loop 

 of varying form. 



Subfamily STRiNGOCEPHALlNiE Dall, 1870. 



StrinirocephalidtP King, 1850; Davidson, 1853. 



TerebratulidiT" 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 MEGALANTERiNiE Waagen, 1882. 



Terebratulidic with a long loop having ascending branches. 



Megalanteris CEhlert, 1887. 



Megantcris Suess, 1855. 

 ?Cryptacanthia White and St. 

 John, 18G8. 



Cryptonella Hall (1861 ?), 18G7. 

 Harttina Hall and Clarke, 1803. 



2a'. Subfamily Terebratulin^ Dall, 1870. 



Terebratulidne with a short loop. "A median unpaired coiled arm 

 exists in recent genera" (Beecher). 



Eunella Hall and Clarke, 1893. 

 Crantena Hall and Clarke, 1893. 

 Dielasma King, 1859. 



Epitliyris King, 1850 (not Phillips, 



1841). 

 Seminnla McCoy, 1855 (not 1844). 



Dielasmina Waagen, 1882. 

 Kotothyris Waagen, 1882. 

 Zugmoyeria Waagen, 1882. 

 Dictyothyris Douville, 1880. 

 Glossothyris Douville, 1880. 

 Pygope Link, 1830. 



'The ontogenetic liistory of Stringocepbalus is not known. Its mature loop, however, is so 

 ditferent from that of the CentronellidiB that it appears probable that this appendage passed through 

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



