J. H. Kloos— Cretaceous Basin in the Sauk Valley. 17 
lamine of the interior would seem fo preclude the possibility 
of such an adjustment by flexibility.* 
t is ana safes? necessary to add, that the irregular 
arrangement the plates composing the disc of this s type, 
without any tendon to arrange themselves into radial and 
interradial series, together with its general habit of growth, 
show that it belongs to the Cystoidea, and not to the PN ge 
group of Crinoidea. Its want of arms and pinnule also a 
proximate it to the Cystordea, in which the arms are va y 
in a more or less rudimentary condition, or the former 
cases, even entirely wanting. In its apparent entire seis of 
oth arms and pinnuls, and especially in its want of visible 
openings, gid the possession of a system of internal radiating 
lamine, it is entirely peculiar, and unlike any other known type, 
either of the typical sites tine or Cystoidea. How the respiratory, 
reproductive, and nutritive functions, of such a being as it 
appears to be, could hage been performed, remains a mystery, 
and hence it is evident that Sie ae yet remains to be learned 
in regard to its structure. 
f course, such a form cannot be properly ranged in fore of 
the recognized families of the typical Crinordea or of the Cys- 
toidea, but should be regarded as the type of a new family of 
the latter, under the name Lichenocrinide. 
Arr, IIL—A Cretaceous Basin in the Sauk Valley, Minnesota ; 
by J. H. Kioos. 
ne oO ‘ 
to Red Rock, the eastellated bluffs consist entirely of magne- 
sian limestone, and give a peculiar character to the scenery ; 
the sandstone, nator in the gradual and hardly percep- 
tible northern dip of the strata, having disappeared under the 
level of the water. At Red Rock, k, St. Peters sandstone and 
* One ee from Mr. er’s collection, is seen lying in the 
de ntier as to exnoce the detached under side of the disc; while 
one of its edges is curved and folded upon itself. As none “4 ig plates, however, 
is broken or displaced, nor any of the sutures between them gaping along the 
folded edge, I cannoi believe this folding due to cerning but that some peculiar- 
ity of its station caused this individual to 0 grow wa 
Am. Jour. 8c1. as Sentes, Vou. III, No. 13. ha ‘1872, 
a 
