Xll 



].X 'PRODUCTION. 



Models of the Species." by Jacob Green, M. D., accompanied by a Supplement 

 in L835. This Monograph included several of the best known and most char- 

 ristic of the Devonian species, namely: 



Asaphus 1= Dalmanites) pleuroptyx. 

 A. (= D.) mynnecophorus. 

 . = Phaco} Calymene (= D.) anehiops. 



i .. . /• ... op rana. Calymene* Odontocfphala = D. selenums. 



In the Annual Reports of the Palaeontological Department of the New York 

 Stale Geological Survey, for 1839, 1S40 and 1841, Mr. T. A. Conrad described 

 the species Odontocephalus selenurus (Eaton), Asaphus (—Dalmanites) aspectans, 

 Calymene marginalis (== Proetus Rowi, Green, 1838), Asaphus? denticulatus (= Dal- 

 manites aspectans), and Asaphus? acantholeurus (= Dalmanites myrmecophorus, Green). 

 From this date onward to the year 1861, brief notices of American Devonian 

 Trilobites were published by various writers, viz.: 



Burmeister, Emmons, Owen, Vanuxem. 



Castelnau, Hall, Shumard, 



I n 1 86 1 , Professor James Hall published (Descriptions of New Species of Fossils 

 from the Upper Helderberg, Hamilton and Chemung groups; in advance sheets 

 of the Fifteenth Annual Report of the New York State Cabinet of Natural 

 History) a brief revision of the previously described Devonian Trilobites from 

 the State of New York, with the addition of several new species. The follow- 

 ing species were discussed : 



platyS, I rREEN. 



// nalonotus Dekayi, Green. 



/'/m, opt ■ • it tata, If all. 



Phacops bombifrons, Hall( = Ph. cristata, partim). 



Phacops rana, Green. 



Phacops bufo, Green. 



a, Hall. 

 Phacops nupi ra, Hall i 1843). 

 Dahiu , Hall | Dalmanites) aspectans, 



l ■ iNBAD. 



Dalmania (= Dalmanites) mynnecophorus, Green. 

 Da ma ; " Dalmanites) emarginata. Hall. 

 Pit tome, Hall. 

 ■ iisi liuiii/iii. Green. 

 Dalmania (= D . Eaton. 



i lites) bifida, Hall. 

 Da i i 1 1 1 /■■> Ha, Hall. 



: Dalmanites) coronata, Hall. 

 I- Dalmanites) anehiops, Green. 



Dalmania(=Dalinanites)anchiops,w.armata,HA.hL 



Dalmania (== Dalmanites) Calypso, Hall. 



Dalmania (= Dalmanites) Erina, Hall. 



Dalmania {= Dalmanites) nun-nips, Hall. 



Lichas grandis, Hall. 



Liehas armatus, Hall (= L. Briopis, Hall). 



Pnn Ins < 'onradi, Hall. 



Proetus a iiijnslifriiiis. Hall. 



Proi Ins tJesione, Hall. 



Proetus crassimarginatus, Hall. 



Proi I us i turns. Hall. 



P Hits canaliculatus, Hall. 



I'm, I ns Y, rm aili, Hall. 



Proitus Huhli iniiiii. Hall. 



Proetus null run ji/nil us. Hall. 



Proetus marginalis, Conrad. 



Proetus Rowii, Green. 



Proetus longicaudus, Hall. 



Proetus occidt as, Hall. 



