134 Dr. H. A. Nicholson on some Fossils 



considerable number of fossils from the GraptoHtic Shales of 

 the Quebec group along the fine exposures of Point Levis. 

 Most of these are, of coiu'se, familiar forms, which have been 

 previously described and figured by Hall in his beautiful 

 memoir on the Graptolites of the Quebec group (' Figiu-es and 

 Descriptions of Canadian Organic Remains,' Decade ii.). Two 

 or three, however, of the forms which I obtained are new to 

 science ; and in characterizing these I shall at the same time 

 take the opportunity of making some remarks on some of the 

 ah-eady described species. The following list embraces the 

 species which I have determined from my collection : — 



Hydrozoa. 

 Callograpsus eJegans^ Hall. 



Salter I ^ Hall. 



Dictyonema grandis, Nich. 

 Clonograpsus flexilis^ Hall. 



rigidus. Hall. 



Tetragrapsus [Graptolithus) hryonoides^ Hall. 



( ) fniticosus^ Hall. 



quadrihrachiatus^ Hall. 



approximatus^ Kich. 



Didymograpsus {Graptolithus) mVtc^MS, Hall. 



( ) patulus, Hall. 



( ) pennatulusj Hall. 



Phyllograpsus typus^ Hall. 

 Dawsonia acuminata, Xich. 



rotunda, Xich. 



tenuistriata, Nich. 



BeACHIOPODA. 

 Lingula Irene, Billings. 



Crustacea. 

 Caryocaris, 



Dictyonema grandis, Nich. 

 Frond conical or fan-shaped ; branches very strong and 

 robust, diverging from the base^ frequently and regularly bifur- 

 cating, and separated by interspaces which are about twice 

 their own width. Width of the branches from 5 to 6 hundredths 

 of an inch. Fenestrules oblong, from 8 to 10 hundi-edths of 

 an inch in width by from 5 to 6 hundredths of an inch in 

 length, rarely square or longer than broad. Connecting 

 filaments or dissepiments from 4 to 5 hundredths of an inch in 



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