PALEONTOLOGY. 263 



presents an imi)ortant revision of former views in regard to tlie order of 

 succession of the Cambrian faunas of North America. The discovery 

 of an unbroken section in Manuel's Brook, Conception Bay, Newfound- 

 land, extending from the Arch?ean Gneiss upward through the Olenellus 

 and to the Paradoxides fauna, confirms the order for these faunas pre- 

 viously recognized in Sweden. The author announces the following 

 revised classification of the Cambrian, showing this to be the true order 

 of succession of the several terranes of the Cambrian in North America: 



(1) Lower Cambrian (Georgia, Prospect, Terra Nova terranes) with 

 the Olenellus fauna ; (2) Middle Cambrian (St. John, Avalan and Brain- 

 tree terranes) with the Paradoxides fauna ; (3) Upper Cambrian (Pots- 

 dam, Knox, Ton to, Belle Isle, etc., terranes) with the Diceliocephalus or 

 Olenellus fauna. This article is an abstract of remarks made by the 

 author before the International Geological Congress in London, in the 

 course of discussion on the Cambrian system, on September 18, 1888. 



E. P. Whitfield (298) records the discovery of fossils from the Birds- 

 eye limestone at Fort Cassin, Vermont, on the eastern shore of Lake 

 Champlain. The paper is an extract from Bulletin No. 8, of the Ameri- 

 can Museum of Natural History, not yet published. 



C. Rominger (228) describes as new species certain fossils from Mount 

 Stephens, Northwest Territory of Canada, as follows.* 



Ogygia klotzi, p. 12, pi. i, f. 1. 



Ogygia serraia, p. 13, pi. i, f. 2, 2a. 



Embolimus spuiosa (gen. et sp. nor.), p. 15, pi. i, f. 3. 



EmboUmus rotundata, p. 16, pi. i, i. 4, 5. 



Conocephalites cordillerce, p. 17, pi. i,. f. 7. 



He also recognizes the forms Monocephalus salteri, Bill., Bathyurus, 

 Agnostus, Obolella, and a Theca resembling T. primordialis^ Hall. Ba- 

 thyurus .^, p. 18, pi. I, f. 8. Agnostus ?, p. 18, pi. i, f. 1 (compare A. integer j 

 Barr). 



Mr. Walcotc (264) criticises this paper, and Mr. Rominger replies to 

 the criticism in the American Geologist, vol. i, pp. 356-359. (See also 

 note, Am. Geol., vol. i, p. 61.) 



In the article by C. D. Walcott (264) an account is given of fossils 

 derived from the same locality as that from which Mr. Rominger's fos- 

 sils came. Mr. Walcott compares the species with the Nevada fauna of 

 the Cambrian, the order of sequence of which is already known, and 

 from his comparison concludes that " the Mount Stevens fiiuna should 

 be referred to about the horizon of the upper portion of the Middle Cam- 

 brian fauna." (This determination is prior to Mr. Walcott's discov- 

 eries injNewfoundland). (See 265.) Of the new genus and five new spe- 

 cies described by Mr. Rominger, Mr. Walcott shows that the name ^>»- 

 6o?t?»MS is preoccupied by Westwood; that EmhoUmus »pi7iosa, Mainin- 

 ger, 1887, was previously described as Olenoides spinosus by Walcott in 

 1886, (Bull. U. S. Geol. Survey, No. 30, p. 184, pi. xxv, f. 6), and is 

 therefore a synonym, and that Embolimus rotundata, Rominger, 1887, 



