52 CALIFORNIA ACADEMY OF SCIENCES. 



Recent explorations in the Wappinger Valley 



limestone and other formations of Dutchess county, New 

 York. 



In Am. Jour. Sci., 3d ser., vol. 28, 1889, p. 139, plate. 

 Fossiliferous strata of the paradoxides zone at Stissing Leperditia ehenhta 

 u. sp. Olenoides fstissingensis n. sp. 



Eaton (Amos). Geological Equivalents. 



Description of Ogygies latissimus and Cancer trilobioides. 



In Am. JoiiT. Sci., 1st ser., vol. 21, 1832, pp. 1.35, 136, note. 



Trilobites. 



Am. Jour. Sci., 1st ser., vol. 22, 1832, p. 165. 



Brongniartm n. g. 



We learn from reference to Dr. Amos Eaton's description and figures 

 given in his "Geological Text-book," p. .33, pi. 1, fig. 3 (2d ed., 1832), 

 that the original of Brongniartta carcmodea Eaton, was the same as that 

 afterwards described by Dr. Jacob Green (Monthlj' Am. Jour. Geology, 

 vol. 1, June, 1832; also Mon. Tril. N. A., p. 87, pi. 1, fig. 6, cast 34), as- 

 Triarthrus heckii. 



Geological text-book for aiding the study of 



North American geology; being a systematic arrange- 

 ment of facts collected by the author for his pupils, etc. 

 2d ed., 5 pis. June 15, 1832. 



The following species are described in this work, pp. 31-34: Genus 

 ''('alamena," C.MiimeiibachilfCali/menesenarki Conrad), pi. 2, fig. 19; genus 

 A-taphus, A,, hansmannii, A. caudatus ( Dalmanites limulurus Green), jdI. 2, 

 tig. 18; A. selenourus (Dalmanites selenurus Eaton), pi. 1, fig. 1; genus 

 B rongniariia, B. platycephala (Homalonotvs dekayi Green), pi. 2, fig. 20; 

 B. isotelea (Asaphus platycephalus Stokes), pi. 2, fig. 22; B. carcinoida 

 (Triarthrus becki Green), pi. 1, fig. 3; geniis Nuttainia, N. concentrica 

 ( Trinucleus concentrica Eaton), pi. 1, fig. 2; N. sparsa ( Homalonotus dekayi 

 Green). 



Eichwald (Eduard). Observationes geognostico-zo- 

 ologicce per Ingriam marisque Baltici Provincias nee 

 non de Trilobites. Casani, 1825, 4 pis. 



The author herein describes and figures eight species of Lower Silurian 

 Trilobites under the new generic term Cryptonymus. In his later work 

 (" Lethoea Rossica," p. 1449) the first three are referred to the genus Asa- 

 jihus, viz.: Cryplonymus schlotheimii to Asaphus schlotheimii, Cryp. weissii 

 to Asaphus weissii, Cryp. panderi to Asaphus expansus Wah\. The last five 

 are classed as follows: Cryp. lichtensteinii under Niobe lichentsteinii, <'ryp). 



