80 CALIFORNIA ACADEMY OF SCIENCES, 



Trilobites of the Hudson River group: Trinucle.us concenlricns. Olenun 

 nsaphoides Emmons, O. undulostriatus n. sp. Thaleops ( Illcjunus) ovalvs 

 Conrad. Agnostus lobaUts n. sp. 



Palseontology of New York. Vol. 1. Con- 



taining descriptions of the organic remains of the lower 

 divisions of the New York system. Albany, 1847, 100 pis. 



Trilobites from the Chazy Limestones: Illnenns arclurus u. sp., /. crax- 

 sicauda ? Asaphus ? obttisus n. sp., A. marginaliH n. sp. Isotelus gigas !, 

 I . canidis Conrad Ms. Ceraurus sp.? Cytherlna sp.? 



For other Crustacea see Trilobites of the inferior strata. 



Remarks on the observations of S. S. Halde- 



man " On the supposed identity of Atops trilineatus with 

 Triarthrus hecJcii." 



In Am. Jonr. Sci., 2d series, vol. 5, 1848, p. 322, 10 woodcuts. 



Descriptions of new species of fossils, and ob- 

 servations upon some others previously not well known, 

 from the Trenton limestones. 



In Third Eept. N. Y. State Cab. Nat. Hist., 1850, p. 167, o pis. (2 eds.) 



AsaphuH eztann Hall. 



This species was used by Mr. E. Billings for the type of linthyurus. 



Description of new, or rare species of fossils, 



from the Palaeozoic series. 



In Rejit. Geo]. Lake Superidr Land Dist. (Foster and Whitney), 1S51. 

 pt. 2, p. 203, pis. 22-35. 



Harpcs CHcanabue n.sp. Dikelocephalvs. Proetiix. Phrtcopfi anchiopx 

 ftreen, P. calUcephalufi Hall. Asaphus barrnndi n. sp. Tracks of a 



Crustacean. ? 



Palaeontology of New York. Vol. 2. Con- 

 taining descriptions of the organic remains of the lower 

 divisions of the New York system. Albany, 1852, 104 

 pis. 



Trilobites of the Clinton Group. — Homalonotusdelphinocephalus. Cybeh 

 punctata Briinn. Calymene clintoni Yanuxem, C. blumenbachii var.? senaria 

 Conrad. Acidaspis sp.? Phacops trisulcdtus Hall. Ceraiirus in8igni'< 

 Beyr. Beyrichia lata Conrad. 



Trilobites of the Niagara Group. — Bumaatus barriensis Murch. Phacops 

 limururus Green. Ceraurus insignis Beyr. Calymene blumenbachii var. 

 iiiagarensis Hall. Homalonolus delphinocephalus Green. Lichas bolloni 

 Bigsby. Bronteus ? niayarensis n. sp. Arges phlyctainodcs Green. Proetu^ 



