scHucHEET] CLASSIFICATION OF TELOTREMATA. 127 



Subfamily Davin^ Waageu, 18S3. 



AtrypidfB with tlie juAU"^ drawn out posteriorly iuto a simple short 

 process. Spiralia laterally directed. 



Dayia Davidson, 1882. 



la". Subfamily Atrypin.15 Waagen, 1883. 



Atrypidne with the jugum situated extremely posterior, complete in 

 young stages, but at maturity discontinuous. Spiralia dorso-medially 

 directed. 



Atrypa Dalman, 1828. 1 Gruenewaldtia Tschernyschew, 



Cleiotliyris Phillips, 1841 (not King, -| gt^rj 



c^^^^^'. .,r.,- -.o-, I ?KarpinskyaTschernyschew,18S5. 



Spingenna fVOrbigny, 18/4. I '^ 



2. Family SPIRIFERID^ King, 1846 (emend Davidson). 



Martin i in iP ami Reticulariina^ Waageu, 1883; Spiriferinidie Davidson, 1884. 



Spiriferacea with the crura directly continuous with the bases of the 

 primary lamella^, which are situated between the laterally directed 

 spiralia. Jugum simple, complete or incomplete. 



2a. Subfamily Suessiinje Waagen, 1883. 



Spiriferidu' with the jugum continuous and more or less V-shaped. 

 Shell structure punctate. 



Spiriferiua d'Orbiguy, 1817. 

 Suessia Deslongchamps, 1854. 



Oyrtina Davidson, 1858. 

 Theocyrtella Bittner, 1892. 



Cyrtotheca Bittner, 1890 (not Salter). 



Subfamily TJNCiTiNiE Waagen, 1883. 



Spiriferida' ( f) with the jugum as in Suessiina?. Just within the 

 posterior margin of the dorsal valve are pouch-like plates. Deltidiiil 

 plates united, deeply concave. Subfamily anomalous. 



Uncites Defrance, 1825. | ?Uncinella Waagen, 1883. 



2b. Subfamily Trigonotretin^ Schuchert, 1803. 



Delthyrin.i' (partim) Waagen, 1883. 



Spiriferida' with the jugum at maturity discontinuous, rei)resented 

 by two short jugal jjrocesses, one attached to each primary lamella. 



? Cyclospira Hall and Clarke, 1893. Syringothyris AVinchell, 1803. 

 Spirifer Sowerby, 1815. * Spinier Meek ami Hayden, 1864. 



Choristites Fisher deWaldheim, 1825. Deltliyris Dalman, 1828. 



TrigonotretaKoeiiig, 1825; Meek and Martiuia McOoy, 1844. 

 Hayden, 1864. 



Spiriferns Blaiuville, 1827. 

 Spirifera J. de C. Sowerby, 1835. 

 Brachythyris McCoy, 1844. 

 Fusella McCoy, 1844. 

 Hysterolithns Queustedt, 1871. 



Oyrtia Dalmiin, 1828. 



Martiniopsis Waagen, 1883. 

 Mentzelia Quenstedt, 1871. 

 Ambocoelia Hall, 18G0. 

 IJeticularia McCoy, 1844. 

 \'erneuilia Hall and Clarke, 1893. 

 1 Metaplasia Hall and Clarke, 1893. 



