86 Notice of the Address of T. Sterry Hunt. 
Am 
pieces a mottled buff and gray limestone, filled with frag. 
ments of minute trilobites and brachiopods, and from a locality 
on Schell Creek, seventy-five miles northeast of White Pine, 
not far from lat. 40°, lon. 115°. These specimens also clearly 
demonstrate the existence of the Primordial fauna at that 
locality ; but the fragments are so imperfect that I will not 
attempt to name any of them, unless it be one, which may be 
either Agraulos Oweni, or another species of the same genus — 
closely resembling this. There are also many very minute 
brachiopods hardly 0-15 of an inch in diameter, which havea 
form not much different from that of Lingulepis prima. 
Art. XIV.—Notice of the Address of Prof. T. Sterry Hunt before 
ne American Association at Indianapolis ;* by James D. 
ANA. 
1. That, while accepting the ordinary views with reg nd ; 
most “pseudomorphs by alteration ” (crystals chemically al : 
j t 
crystals of serpentine having the form of chrysolite, pyroxene, ‘ 
dolomite, etc., are pseudomorphs; and the same of those of 
steatite, having the form of hornblende, pyroxene, spinel, a ce 
of those of pinite having the form of nephelite, scapolite, et; — 
g prop 
erties, and no other interior features or qualities conforming - : 
the external form ; that (2) the crystalline forms are just WG. 
presented by the species after which they are supposed to , 
pseudomorphs, and the idea of their being real forms of a simg™ 
polymorphous species is wholly inadmissible, as pronounced ; 
every crystallographer who has written on the subject; that\) 
the pseudomorphs show all stages in the process of change eee 
“i* Prof. Hunt’s address has been published in the American Natori re & 
September, and, since then, in part, in “Nature.” Those who would sae 
fully the criticisms here offered can, therefore, easily obtain a copy. 
