76 CALIFORNIA ACADEMY OF SCIENCES. 



A new Trilobite. Letter to the editor, Dec. 



26, 1833. 



In Am. Jour. Sci., 1st series, vol. 23, 1833, p. 397. 

 A»ajihufi myrmecophorus ii. sp. 



Description of a new Trilobite from Nova 



Scotia. 



In Trans. Geol. Soc, Penn., vol. 1, pt. 1, 1834, p. 37, pi. 4. 

 Asaphus ? crypturus n. sp. 



Description of some new North American 



Trilobites. 



In Am. Jour. Sci., 1st series, vol. 25, 1834, p. 334. 



Calymene odontocephalus n. sp. Asaphvs astrngalotra n. sp., A. tetrar/o- 

 nocephaliis n. sp. Paradoxides harlani n. sp. 



A supplement to the monograph of the Trilo- 



bites of North America, with colored models of the 

 species. Philadelphia, 1835, 24 pp. (May 1, 1835). 



Calymene odontocephalus, Cast No. 36. Asaphns astragalotes, CastNo. 37; 

 A. tetraijonocephaluii, Cast No. 38. Paradoxides harlani, Cast No. 39. 

 Asaphus myrmecophorus. Cast No. 40; A. ? crypiurus, Cast No. 41; A. mi- 

 cropleurus, Cast No. 41 (42). 



Description of a new Trilobite. 



In Am. Jour. Sci., 1st series, vol. 32, 1837, p. 167. 

 Calymene phlyctinnoides n. sp. Asajjhus platypleurtis n. sTp. 



Description of two new species of Trilobites. 



Read Jan. 24, 1837. 



In Jour. Acad. Nat. Sci., Phila., vol. 7, 1837, p. 217, 2 woodcuts. 



CrypihcEus n. g., C. hoothii n. sp. Asaphus trimblii n. sp. 



J. W. Salter (Mou. Brit. Tril., p. 15) gives the following diagnosis of the 

 genus, and uses it as a subgenus to Phacojjs : "Form of moderate size, 

 depressed. Glabella depressed, not much expanded in front; all the lobes 

 distinct, the front ones not greatly enlarged, genal angles long-spined. 

 Pleura truncate, and the hinder ones often produced into spines. Tail 

 large, of many segments; the margin spinose." 



Description of several new Trilobites. 



In Am. Jour. Sci., 1st series, vol. 32, 1837, p. 343, 2 woodcuts. 

 Cryphoius hoothii Green, C. caUitelus n. sp. Trimerus jacksonii u. sp. 

 Asaphus trimblii Green. 



