REPORT OF THE STATE PALEONTOLOGIST 1901 567 



3 Didymograptiis bifidus Hall cc 



4 D. similis HaU c 



5 Phyllograptiis tvpiis Hall ccc 



6 Ph. ilicifolius Hall cc 



7 Ph. anna Hall c 

 The faunules of the graptolite beds 3-5 receive their charac- 

 teristic aspect from the new appearance and abundance of in- 

 dividuals of P h y 1 1 o g r a p t u s t v p u s, Ph. anna, 

 Didymograptus bifidus, D. similis and T h a m - 

 nograptus anna. The last four were, together with 

 Tetragraptus fruticosus, described by Hall as 

 occurring in the " Quebec group, 3 miles above the river 

 St Anne." They pertain, hence, to an association not known 

 to him from the Levis region, nor have they, to the writer's 

 knowledge, been reported since from the Levis beds, with the 

 exception of Didymograptus bifidus, which is listed 

 by Ami (Geol. surv. Can. Eep't for 1887-88, 53 k) as found 

 in an excavation near the City hall of Levis and by Gur- 

 ley as occurring also in another Levis zone identical 

 with the next succeeding Deep kill zone. Lapworth found 

 Phyllograptus anna associated with some other 

 species, which are common to this and the Tetragraptus zone, 

 in the collections submitted to him from the south side of the 

 St Lawrence river, and termed this the St Anne zone or zone 

 with Phyllograptus a n n a . He correctly supposed it to 

 belong to about the middle of the series of the Levis zones. Dr 

 Gurley, in compiling the list of the North American graptolites, 

 had no collection from the St Anne beds to refer to, and cites 

 only the forms listed by Hall and Lapworth. 



Though the fauna of this zone, as well in the shales of 

 St Anne des Monts, as in the Deep kill beds, appears rather 

 limited when compared with that of the preceding zone, it is 

 notwithstanding of the greatest interest, first stratigraphically, 

 as it clearly marks a distinct horizon or zone, which is also 

 discernible in very distant regions, and secondly phylogenet- 

 ically, as it indicates the approaching suppression of the 



