150 SYNOPSIS OF AMERICAN FOSSIL BRACHIOPODA. [hill. 87. 



Athyris spiriferoides (Eaton)— Ooiitiuued. 



Atbyris concontrica Billings, Canadian Jonr., VI, 1801, p. 145, figs. 54-.')7; — Geol. 



Canada, 1863, p. 373, fig. 399; p. 385, fig. 421. 

 J.ov. New York ; Pennsylvania; Maryland ; Virginia; Cayuga and Widdor, Canada. 



Atliyris squamosa Wortlien=01eiotliyris squamo.sa. 

 Atliyris sublaniellosa TIall=Cleiothyris roissyi. 

 Atliyris subquadrata Hall=Seminnla subquadrata. 

 Atliyris snbtilita ria]l = Seininnla arg^entea. 

 Atbyris trimieleus Hall = Semiiiula trinii(!lens. 

 Atliyris trisinuatus McCbesiiey=Meristiiia trisinuata. 

 Atbyris tumida J?oenier=Meristina tuniida. 



Athyris (?) tumidula Billings, Anticosti (Sil.). 



Athyris tumidula Billings, Catalogue Sil. Foss. Anticosti, 1866, p. 47. 

 Loc. Anticosti. 

 Ohs. Probably a species of Wbitfieldella. 



Athyris (?) turgida Sbaler. Anticosti (Sil.). 



Athyris turgida Sbaler, Bull. Mus. Conip. Zool., 4, 1865, p. 69. — Miller, N. Anieri- 



Van Geol. Pal., 1889, p. 335. 

 Loc. Anticosti. 



Athyris ultravarica McChesney. Keokuk (L. Carb.). 



Atbyris ultravarica McCbesney, Descriptions New Pal. Fossils, 1861, p. 79. 



Loc. Keokuk, Iowa. 

 Atbyris umbonata Billings = Hindella unibonata. 

 Atbyris unisulcata Binings = Pentagonia unisnlcata. 

 Atbyris vittata Hall=A. fultonensis. 

 ATRYPA Dabnan. Genotype Anoinia reticularis Linnnens. 



Atrypa Dalmau, Kongl. Svenska Vet.-Akad. llandl., fr.r 1827. 1828, p. 102.— 

 Billings, Canadian Nat. Geol., I, 1856, p. 134; — Canadian Jour., VI, 1861, p. 

 264.— Wbitfield, Tweutietb Rep. N. Y. State Cab. Nat. Hist., 1867, p. 141, pi. 

 1.— Hall, Pal. New York, IV, 1867, p. 312.— Nettelrotb, Kentucky Fossil 

 Shells, Mem. Kentucky Geol. Survey, 1889, p. 88.— Hall and (Clarke, Pal. New 

 York, VIII, Pt. II, 1893, p. 163;— Thirteenth Ann. Rep. N. Y. State Geolo- 

 gist, 1895, p. 818. 



Atrypa iequiradiata Conrad =Eenssel{eria ipqulnidiatii. 



Atrypa acutiplicata Conrad = Anoplotboca acnlii)licata. 



Atrypa acutirostruni Hall = Rbyncbonella acutirostris. 



Atrypa atfmis Vanuxeni = A. reticularis. 



Atrypa altilis IIall = Camarot(ecbia plena. 



Atrypa anibigua Iiall = Caniarella and)igua. 



Atrypa aprinis Hall = IIoni(eosj)ira aia'iiiifonnis. 



Atrypa arata Conrad = Bentanierella arata. 



Atrypa aspera American autbors=A. spinosa. 



Atrypa aspera occidentalis Hall = A. bystrix occidcntalis. 



Atrypa bideiis Hall=lvbyn(,'li<)n('lla bidens. 



Atrypa bidentata Hall = IMiyncbonella bidentat.i. 



Atrypa bisulcata Hal 1 (non Vanuxem)=Cyclos)>iia bisul(;ata. 



Atry])a bisnlcata Vanuxcin (non ITall) - Wbit(i( Idclla bisulcata. 



Atrypa brevirostris llall = Anastroi)hia brevirosLiis. 



