NottH on the Devonian RocIh. — Calvin. 143 
It may be interesting to state that this same (iyiorcrutt and similar robust 
forms of (hjpi(hila occur in the brecciated limestone at Troy Mills. 
About a mile east of Independence the fhinn-ernn beds may be seen rest- 
ing on the Independence shales. In the old Kilduff quarry, northeast of 
the city, where the shales were explored for coal, the Gyroceras beds 
were penetrated, and the "petrified snakes" attracted much attention. 
4. Spirifi:ro pf.niuitd hedn. At Independence these beds are about twen- 
ty-five feet in thickness and consist of light-colored, soft, argillaceous 
limestones. Spirifcrti, pe.mwta Owen, is the characteristic fossil, but 
associated with it are ,S'. himfHuiliif Hall, AfrijiKi ref iciildriit hinn, A. oMpern 
var. orridentdliH Hall var., Cjfrtinn h<uiiUtoaenHi.!f Hall, P rodnctdla (/lata 
Hall, Gypidubi oec idcrdalin Hall, Oii.hin ioirenxiH Hall, Ortkiif laarfaiiaoei 
Meek, Str»ph.odonta denuHHa Conrad, a large undescribed (Jhonftcif and a 
few other forms. The fossils are almost exclusively brachiopods. The 
Atrypa reticidariH is a very finely ribbed variety with a tendency to be- 
come alate at the cardino-lateral angles, and having a form that is de- 
cidedly lenticular, particularly in the young and half grown individuals. 
The Cyrtiint hniDiltiHuiiHia is identical in size and shape with the form 
found in the Hamilton strata of New York and western Ontario. The 
Sfrophodmita deiiUHifa. is a small, short-hinged, arcuate form, with broad 
flattened ribs. The Spirifera pennata beds are seen in the banks of the 
stream at Otterville, a few miles north of Independence. They are also 
seen on the west side of the river near Quascjueton, ten miles to the 
southeast; at a number of exposures near Troy Mills, eight miles farther 
to the southeast and at intermediate points. Some of the layers in- 
cluded under number 4, are destitute of fossils, but the species enumer- 
ated will be found botli above and below the barren layers. 
5. Ai'f'i-ridiiriji profunda hcdx. At Independence the Spirifera pennata 
beds grade upwards into beds of harder limestone in which brachiopods 
are scan-e and corals of a variety of species predominate, ('yxtiphyll'im 
(nnericannni Ed. and H. is at first the most abundant. With it, however, 
occurs very sparingly lldiaphylhna hulU Ed. and H. There is also a 
Cyathophyllum or two, and eventually large numbers of Arercnlaria 
profunda Hall. Within the limits of the city of Independence the up- 
permost layers usually reach only into the zone of Cystiphyllums, but 
occasionally the upper beds include Anrndaria prof inula. From a mile 
to a mile and a half east of the city this last species is quite abundant. 
At a quarry near .Jesup, about nine miles west of Independence the A. 
profunda beds are well developed, but it is at Littleton, about ten miles 
northwest from Independence, that they are seen in greatest perfection. 
About a mile south of Littleton a " dry run," that becomes quite a tor- 
rent in rainy weather and at other times is a mere dry channel, has cut 
into the A. profunda beds. The matrix here is much softer than at 
Independence and the corals are beautifully weathered out. Along with 
.1. profunda occur excellent specimens of ('uxtiphylluin, f'yathophyllinn^ 
Zaphrcntix, Faroxitt'n^ (jladnpora, f'onitfx. Stroaaitopora and Other genera. 
At Independence the corals separate from the matrix with extreme diffi- 
culty and satisfactory specimens are rarely obtained. In the banks of 
