SCHUCHERT.] 



CLASSIFICATION OF TELOTREMATA. 



121 



2. Family LINGULID^ Gray, 1840. 

 Lingulidiii Gill, 1871. 



Attenuate, subquadrate or spatulate, almost equivalved Liugulacea, 

 derived through Liugulellidie, with a more or less long', tubular, flexible 

 ])edicle. Muscles highly differeutiated aud consisting of six pairs, two 

 of adductors, and four of sliders, or adjustors. 



Lingula Bruguiere, 1792. 



Pharetra Bolton, 1798. 

 Liugularius Diimeril, 1806. 



Glossina Phillips, 1848. 



Dignomia Hall, 1871. 

 Glottidia Dall, 1870. 

 Barroisella Hall and Clarke, 1892. 

 Tomasina Hall aud Clarke, 1892. 



3. Family LIII^GUL AS MATID^E Winchell and Schuchert, 1893. 



Platform-beariug Liugulacea derived through Lingulidte. 



Liuguloi^s Hall, 1871. Lingulasma Ulrich, 1889. 



Lingulelasma Miller, 1889. 



Order TELOTREMATA Beecher, 1891. 



Sclerobrachia Gray, 1848; Kampylopegmata (partim) Waagen, 1883; Pegmatobran- 



chiata (partim) Neumayr, 1883. 



Articulate Brachiopoda, with the pedicle opening shared by both 

 valves ill uepiouic aud early ueauic stages, usually confined to one 

 valve in later stages, and becoming more or less modified by deltidial 

 plates in ephebic stages. Brachia supported by calcareous crura, 

 loops, or spiralia. Prodeltidium absent. 



Superfamily RHYNCHONELLACEA Schuchert, 1896.' 



Rostracea Schuchert, 1893 ; Ancistropegmata (partim) Zittel, 1895. 

 Rostrate, primitive Telotremata, with or without crura. 



1. Family PROTORHYNCHID.E Schuchert, 1896.' 

 Primitive Rhynchouellacea, without deltidial i)lates or crura. 

 Protorhyncha Hall and Clarke, 1893. 



2. Family RHYNCHONELLID^E Gray, 1848. 



Hypothyrida- (partim) King, 1850; Rhynchonellin;e Gill, 1871; Waagen, 1883. 



Rhynchouellacea with more or less long crura. 



' Text-book of Paleontology, by Zittel and Eastman, 1896, p. 323. 



