so ■ CALIFORNIA ACADEMY OF SCIENCES. 



Trilobites of the Hudson Eiver gronp: Trhuiclcus concentricm. Oleuux 

 asapho/defs Emmons, 0. u7idulostriatns n. sp. Thalcops ( Illanus) ovaiiis 

 Conrad. Agnostus lohatiifi n. sp. 



Palseontology of New York. Vol. 1. Con- 



taining descriptions of the organic remains of the lov^er 

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



Trilobites from the Chazy Limestones: lUoenus arciurus n. sp., /. cros- 

 sicauda ? Asdphus ? obiusus n. sp., A. marginalia n. sp. hotelus gigan !, 

 I. canalis Conrad Ms. Ceraurus sp.? Gijthtrina sp.? 



For other Crustacea see Trilobites of the inferior strata. 



Remarks on the observations of S. S. Halde- 



man " On the supposed identity of Ato'ps trilineAdus yK\i\\ 

 Triarthrus beckii." 



In Am. Jour. Sci., ^d 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, 5 pis. (2 eds.) 

 Asaphufi extans Hall. 

 This sjjecies was used by Mr. E. Billings for the type of Bathi/nrus. 



Description of new, or rare species of fossils, 



from the Palaeozoic series. 



In Eept. Geol. Lake Superior Land Dist. (Foster and Whitney), 1851, 

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



Harpes escanahice n.sp. Dikelocephahis. Proetiis. Phnco})S anchiopx 

 Green, P. callicephalua Hall. Amphus harrandi n. sp. Tracks of a 

 I'rnstacean. ? 



Pakeontology 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 Gronp. — Homalonotusdelphiiiocephalus. Cybele 

 punctata Briinn. Calymenc cZmto7i< Vanuxem, C. blumenbachii var.? senaria 

 Conrad. Acidaspis sp.? Phacops trisulcatus Hall. Ceraurus insignis 

 Beyr. Bei/richia lata Conrad. 



Trilobites of the Niagara Group. — Bumastus barriensia Murch. Phacops 

 /imururus Green. Ceraurus insignis Beyr. Calymene blumenbachii var. 

 itiagare.nsis Hall. Homalonotus delphinoce}>halus Green. Lichas boltoni 

 Bigsby. Bronteua ? niagarenHis n. sp. A rgts phJyctainodcs Green. Proctux 



