88 THE CAMBRIAN. [bull. 81. 



lella starri, n. sp., p. 146, Lingulella radula, n. sp., p. 147, Eoichnites-, 

 n. gen., p. 148, Gtenichnites, n. gen., p. 15L, Gtenichnites ingens, n. sp., 

 p. 151, Frcena ramosa, n. sp., p. 159, Arenicolites brevis, n. sp., p. 159, 

 Goniadichnites 1 n. gen., p. 160, Goniadichnites trichiformis, n. sp., p. 160, 

 Monocraterion magnificum, n. sp., p. 161. 



In addition to the preceding Mr. Matthew has remarked upon several 

 genera and species that have been previously described from the Cam- 

 brian rocks. They include : Eocoryne geminum Matt., p. 130, Lepidilla 

 anomala, Matt., p. 130, Orthis and Orthisina, p. 131, Stenotheca Salter, p. 

 132, Stenotheca concentrica, Matt., p. 133, var. radiata Matt., p. 133, 

 Stenotheca triangularis Matt., p. 134. In his remarks upon the genus 

 Stenotheca he concludes that the type species is not a molluscan shell, 

 but should be referred to a Phyllopod crustacean. This includes the 

 typical form, but does not include Discina acadica, of Hartt, as the latter 

 is a patelloid gasteropod. Gonocoryphe tcalcotti Matt., p. 134, Goncory- 

 phe baileyi Hartt, p. 135, Paradoxides lamellatus Hartt, p. 135, Paradox- 

 ides micmac, var., pontificalis Matt., p. 136, Agraulos (?) whitfieldianus 

 Matt., p. 138, Agraulos socialis Bill., p. 138, Medusites princeps Torrell, p. 

 140, Medusites radiata Kathorst, p. 141, Medusites costata, p. 142, Eoich- 

 nites linnwanus Torrell, p. 148, Psammichnites Torrell, p. 157, Frarna, 

 Koualt, p. 14>8, Monocraterion Torrell, p. 160, Monocraterion tentaculatum, 

 p. 161, Histioderma hibernicum, p. 162. 



EASTERN MASSACHUSETTS. 



The first description of a fossil from the Cambrian rocks of eastern 

 Massachusetts is that of Paradoxides harlani, by Dr. Jacob Green, 1 from 

 specimens sent to him by Dr. Richard Harlan, who supposed they came 

 from Trenton Falls, in the State of New York. It was not un til 1856 2 

 that the true horizon from which the specimens came was discovered. 

 In making the announcement of the discovery Prof. Rogers quoted 

 from Barrande on the distribution of the genus Paradoxides, and stated 

 that he considered the specimens from Braintree, 10 miles south of 

 Boston, to be identical with the Paradoxides harlani described by Green 

 in 1834. He says the fossils in the Braintree quarry are in the form of 

 casts, some of them of great size and lying in various levels in the 

 strata, and that as far as he could observe they all belong to one spe- 

 cies and agree more closely with Barrande's Paradoxides spinosus than 

 with any other form known to him. A fine figure of Paradoxides har- 

 lani was published by Prof. Rogers, 3 in his final report of the geological 

 survey of Pennsylvania, under the name of P. sjnnosns. 



Mons. J. Barrande, in referring to the discovery of Paradoxides in 

 the slates of Braintree, 4 institutes a comparison of the specimens from 



1 Descriptions of some new North American trilobites. Am. Jour. Sci., vol. 25, 1834, p. 336. 



2 Proofs of the Protozoic age of some of the altered rocks of eastern Massachusetts, from fossila 

 recently discovered. Am. Acad. Proc, vol. 3, 1856, pp. 315-318. « 



s The Geology of Pennsylvania, Philadelphia, 1S,">8, vol. 2, p. 816. 



4 Trilobiten der Primordial-fauna in Massachusetts. Neues Jahrb. for 1860, pp. 429-431. 



