20 CALIFORNIA ACADEMY OP SCIENCES. 



Untersuchunger liber Trilobiten. Zweites 



Stiick als Fortsetzung zu der Abhandlung " Ueber einige 

 bohmische Trilobiten." Berlin, 1846, 3 pis. 



Harpides n. g. Cheirurus gibbus Beyr., C. exsuln. sp., C. or7iatusDalm. 

 Sphcerexochus n. sp. ? S. mirus Beyr., {S. beijrichi Liudstom), pi. 1, fig. 

 9. Lichas laciniaia u. sp., L. angusta u. sp., L. tricuspidata n. sp., L. 

 scabra n. sp. Arges armatus Gold., A. speciosus Beyr., A. anglicus n. sp. 

 Bronteus campanifer Beyr., B. ^'ft^'l/e** Beyr., B. pendulus, B. insignitus 

 Romer. Odontopleura ovaia Emm., 0. mutica Emm., 0. inermis n. sp., 

 O. brighiil Murch., 0. cornuta n. sp., 0. vesiculosa n. sp. Calymene dla- 

 demata Bavr., C. 2'>n^vula Barr., Cpulchra Barr. Proetus coiicinniis, P. 

 corniitus. Triniicleus ornatus Sterub. Harpes ungula Sterub. Harjj'ides 

 hosjjes n. sp. Staurocejyhalus murchisoni. 



I/eber Leaia leidyi. 



In Zeitsch. Deiitsch. geol. Gessel. vol. 16, 1864, p. 363. 



Bigsby (J. J.) A sketch of the Geology of the Island 

 of Montreal. 



In Annals Lye. Nat. His. N. Y. vol. 1, 1825, p. 198. 



The aiithor figures a trilobite (Trhiucleus concentrkus) pi. 15, fig. 1. 



Bigsby (J. J.) Description of a new species of Trilo- 

 bite. 



In Joi;r, Acad. Nat. Sc. Phila., vol. 4, pt. 2, 1825, p. 365, pi. 23. 

 Paradoxides boltoni [Lichas boltoni). 



Thesaurus Siluricus. The flora and fauna of 



the Silurian period. London, 1868. 



Billings (E.) Fossil foot prints. 



In Canadian Naturalist, vol. 1, 1856, p. 35, wood cuts. 

 Protichnites sej^teni-notatus. 



On some of the characteristic fossils of the 



Lower Silurian rocks of Canada. 



In Canadian Naturalist, vol. 1, 1856, p. 39, 11 wood cuts. 

 The author figures Isolelus gigas, Calymene senaria, and the hypostoma 

 of Isolelus gigas. 



Fossils of the Upper Silurian rocks, Niagara 



and Clinton goups. 



In Canadian Naturalist, vol. 1, 1856, p. 57, 1 pi. 

 Phacops Umulurus Green. 



