120 • JULES MARCOU ON THE TACONIC OF GEORGIA 



In the " Geology of Vermont " there are reprints of four papers which were issued i-e- 

 spectivcly in Decem1)er, 1860, January, 1861, February, 1861 and ISTovember, 1801, show- 

 ing it is an impossil)ility to claim the dates of the introduction (Oct. 1, 1859 and Oct. 

 22, 1860) as exact dates of pul:)Hcation of the work. 



The third date found in the " Geology of Vermont" is at the bottom of the title page 

 in the two volumes, and is 1861. It is also an antedate by several months of the true 

 year. The first printed record I have been able to find of the publication is in the Avie7\ 

 Journ. Sc, May, 1862, xxxiii, 416, Xew IlaA'en, where a review of the work is dated 

 Montreal, March 18, 1862. The review Avas Avj'itten on an advanced copy, for the work 

 was not received in Boston until March 21, 1862. So the exact date of publication is 

 the end of March, 1862. 



!N^ow that we have fixed Avithin a few days the i)ublication of the "Geology of Ver- 

 monf' by Messrs. Hitchcock, let us notice some part of its contents. I shall only refer to 

 what relates to the Taconic system and the Primordial Fauna. 



First, all the papers by Barrande, Logan, Hall and Billings are simply reprints and 

 not always correctly given. At -p. 377, we have "Barrande's views" under the title: "On 

 the Primoi'dial Fauna and the Taconic system of Emmons, in a letter to Professor Broun 

 of Heidelberg " (Proceed. Boston Soc. Nat. Ili'^t., Dec, 1860, vii, 371) . If we look at the 

 volume referred to, we do not find any paper with such a title, but instead the following 

 title " On the Primordial Fauna and the Taconic system by Joachim Barrande, with ad- 

 ditional notes by Jules Marcou." These notes of Marcou are not given in the "Geology 

 of Vermont," but a second letter of Barrande addressed to Marcou is added without ref- 

 erence to its recipient, leading one to suppose that it was addi-essed also to Broun. 



The paper by Billings, at p. 912 (appendix) is without the general title of the pam- 

 phlet, published ISTovember 21, 1861, at Montreal, which is "JN^ew species of Lower Silu- 

 rian fossils." Besides, Mr. C H. Hitchcock has suppressed, without any notice, a whole 

 page of Billings' paper, a very interesting foot-note, pp. 11 and 12, containing among 

 other information a letter from C. H. HitchcoclAimself. 



By these two quotations we see that the " Geology of Vermont" cannot be used as 

 priority for the papers of Barrande and Billings, nor even as an exact reprint, being both 

 defective in regard to titles and contents. 



The classification and nomenclature of Messrs. E. and G. H. Hitclicoch. — I shall now 

 give quotations of the classification and nomenclature used by Messrs. Hitchcock. 

 Page 257: "List of the rocks occurring in Vermont in an ascending order. 



Laurentian or hypozoic gneiss. Hudson River group. 



Potsdam sandstone. Red sandstone series. 



Calciferous sandrock. Quartz rock. 



Chazy limestone. Georgia group. 



Birdseye limestone. Talcose conglomerate. 



Black River limestone. Eolian limestone. 



Trenton limestone. Talcoid schists. 



Utica slate. Upper Ilelderberg limestone." 



Page 326: "Red sandrock series. Stratigraphically considered, this series of beds 

 occupies the position of the Medina group of jS^ew York " (from Prof. AYilliam B. Rog- 

 ers) . 



