20 CALIFORNIA ACADEMY OF SCIENCES. 



Untersuchunger liber Trilobiten. Zweites 



Stuck als Fortsetzung zuder Abhandlung " Ueber einige 

 bohmische Trilobiten." Berlin, 1846, 3 pis. 



Harpides n. g. Cheiruriis gibbus Beyr., C. exsuln. sp., C. ornattis Dedm . 

 Sphcerexochus n. sp. ? S. minis Beyr., (S. heyrichi Lindstom), pi. 1, fio. 

 9. Lichas laciniata n. sp., L. angusta n. sp., L. tricuspidata n. sp., L. 

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

 Bronteus campanifer Beyr., B. palifer Beyr., B. pendulus, B. insignitus 

 Komer. OdontojAeura ovata Emm., 0. mutica Emm., 0. inermis n. sp., 

 0. brightii Murch., O. cornuta n. sp., 0. vesiculosa n. sp. Calymene dia- 

 demata Bavr., C. parvtda Barr., C. pulchra Barr. Proetus concinnus, P. 

 cornutus. Trinncleus ornatus Sternb. Harpes ungula Sternb. Harpides 

 hospes u. sp. Staurocephalus murchisoni. 



Ueber Leaia leidyi. 



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



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

 of Montreal. 



lu Auuals Lye. Nat. His. N. Y. vol. 1, 1S25, p. 198. 



The author figures a trilobite {Trinucleus concentricus) pi. 15, fig. 1. 



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

 bite. 



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

 Paradoxides boltoni (Lichas boUoni). 



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. 

 Protichniies septem-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 Isotelus gigas, Calymene senaria, and the hypostoma 

 of Isotelus gigas. 



Fossils of the Upper Silurian rocks, Niagara 



and Clinton goups. 



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

 Phacops limulurus Green. 



