Geology and Natural History. 417 
the Menevian group,* with the underlying Harlech grits; that is, 
it contains Paradoxides and the same range of generic cokes that 
Barrande and others had previously found in the European Pri- 
mordial ; and a transfer, therefore, of all to the Primordial was 
natural. But Prof. Hunt says, after alluding to the views of some 
others, that Barrande’s course “is a still greater violation of his- 
toric truth, ” as if error which history had made venerable might 
never ge eradicated from science, 
The term Silurian, as used in Great Britain, has included a 
wide nics es formations, from the Lingula Flags to the top of the 
Ludlow group, and all this in spite of a wide range in the tribes of 
fossil species, and notwithstanding the gevcomma ity between 
the Upper and Lower Silurian. Now the Lingula Flags pass into 
the Cambrian without break or unconformability, and with but a 
small Boat a in the life. wWelaa good sg api — is there for 
is slaving “historic truth” as much as to throw the Primordial 
sup. ‘Historic truth,” in fact, has little weight in 
the action, _ though eine. Whi as regards t the labors of two 
ity fo 
ll. Report of the Geological Survey of the State of 8 Ham reat °f 
shire, showing its progress during the year 1871; 
Hisshiea i Ph.D. 56 P. - Nashu aa, x H., is13—Prot 
ite 
: is 
accompanied b by a colored a3 owing the areas occupie 
the different kings of roc ere are ae desoripaons of oe 
hee (Conocephaliter) ariolaris, C. icks, C. ‘anon C. (?) hum- 
7s, Pein age (near Conocoryphe) ‘peimordiaiis, Agnostus princeps, 
itia Solvensis Jones, 
unctatus, Leperdi 
See further, Quart Jo ur. Geol. Soc., xx, 233, xxi, 476, xxv, 51, xxviii, 173 and 
Rep. Brit. Assoc. ice 1866, 1866 and 1868. 
