SHELVE DISTRICT 



Family Trematidae Schuchert . 

 Schizocrania Hall & Whitfield 

 Schizocrania salopiensis sp. nov, 

 Family Discinidae Gray . 

 Subfamily Orbiculoideinae Schuchert & Le Vene 

 Orbiculoidea d'Orbigny 



Orbiculoidea sp. . 

 Schizotreta Kutorga 

 Schizotreta transversa sp. nov 

 Schizotreta sp. . 

 Suborder Craniidina Waagen 

 Superfamily Craniacea Menke 

 Family Craniidae Menke . 

 Petrocrania Raymond . 

 Petrocrania dubia sp. nov. 

 Class ARTICULATA Huxley 

 Order Orthida Schuchert & Cooper 

 Suborder Orthidina Schuchert & Cooper 

 Superfamily Orthacea Woodward 

 Family Hesperonomiidae Ulrich & Cooper 

 Hesperonomia Ulrich & Cooper 

 Hesperonomia sp. 

 Family Orthidae Woodward 

 Subfamily Orthinae Woodward 

 Orthis Dalman .... 



Orthis cf. callactis Dalman . 

 Orthis sp. ..... 



Lenorthis Andreeva 



Lenorthis cf. proava (Salter) 

 Orthambonites Pander . 

 Orthambonites exopunctata sp. nov. 

 Subfamily Productorthinae Schuchert & Cooper 

 Nicolella Reed 

 Nicolella cf. actoniae (J. de C. Sowerby) 

 Subfamily Whittardiinae nov. 

 Whittardia gen. nov. 

 Whittardia paradoxica gen. et sp. nov. 

 Family Dolerorthidae Opik 

 Subfamily Dolerorthinae Opik 

 Dolerorthis Schuchert & Cooper 

 Dolerorthis cf . tenuicostata Williams 

 Subfamily Glyptorthinae Schuchert & Cooper 

 Glyptorthis Foerste 

 Glyptorthis viriosa sp. nov. . 

 Family Alimbellidae Andreeva 

 Astraborthis gen. nov. . 

 Astraborthis uniplicata gen. et sp. nov. 

 Family Finkelnburgiidae Schuchert & Cooper 

 Diparelasma Ulrich & Cooper 

 Diparelasma sp. 

 Family Plectorthidae Schuchert & Le Vene 

 Subfamily Plectorthinae Schuchert & Le Vene. 

 Plectorthis Hall & Clarke 

 Plectorthis whitteryensis sp. nov. 



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