- ¥ » - 
> o- . On thie Siturian System. 
11.G shal iter ip = 
ypseous shales, e vemifigg. Tae 5 3 
10. Lockport limestone, Catenpors, (ne Ey 
‘ asthe Rantings Platynotus,’ ae a a5 
9. ee —— cephalus, Orthis slogans Strophomena ge 
— 3, 
-% 5 
z eS IstPentamers sthite- { Pe ntan en 
TeGreen Mato and iron Agnaiear: iy Sep corrugata, Tentacu- 2 
: ore, | lites parvus. 4 
. Be Top. stratum. Dictuolites Bec 8 
Niagara tone, 2 Fucoides Harlot Tin cornea, a 
: a aileucbubinaarives, } Pterinea carinata, Cyrtolites ornatus. Be 
ae Black sl Triarthrus Beckii, Graptolites or Fucoides dentatus. 3 
oe Mes Oe ea this testudinaria, O. callactis, Strophomena seri- | 9 
_. “*) Trenton limestone,<~ cea, eltoidea, Calymene Blumenbachii, C. mi- 
.* cropleura, Cryptolithus, Isotelus ‘ 
=. 3. Sparry limestone, Fucoides demissus. ’ 
_ » 2. Mohawk limestone, Orthostoma communis : 3 
¥ 
ze 1g ee ore Eaig- } Lingula cuneata. 
Hudson sla tes, Graptolites, (Fucoides serra.) 
Species common to the Sierten rocks of Wales and the Unitet 
tates. — 
~ = 
LUDLOW ROCKS. 
Shells. 
Cyrtoceras ls giganteum, 
ift 
be « 
Bellerophron eat ee 
Orthis orbicularis. = %" 
WENLOCK LIMESTONE aes 
é S. 
Corals. " Trilobites. 
ea ceratites, Tentaculites annulatus, Calymene Galo... 
anthoides, Strophomena euglypha, (C. m <i 
rugosa, Asaphus limulurus.* 
ianthus, (Lepteena depressa, Sow.) 
Catenipora escharoides, Pentamerus galeatus, 
Fay osites fibrosa t galeata, Dalm.) 
ry @ epongites,; Atrypa prisca, 
gothlandica, (affinis, Sow.) 
* aspera, 
lacunosa, 
tenuistriata, 
bidentata, 
* This appears to be the same with Murchison’s A. longicaudatus, and is very 
distinct from the true caudatus, which has not I believe been found in New York; _ 
1 se Teseived from Dr. William Fleming, of Manchester, fine specimens of the 
in limestone, from Dudley. The former is common in the Rochester shales, 
ant Fee not seen it from any other formation. I also received from Dr. Fleming 
a specimen of A, limulurus, from Dudley. 
& 
