The Maquoketa Shales. — James. 
353 
and elsewhere and ascertain whether palseontologic evidence 
will bear out that of stratigraphy. The following list embraces 
species which have been identified from material collected by 
the writer at the typical locality of the Maquoketa shales of 
Dr. White. In the table the distribution of the species is 
List of fossils identified from Maquoketa Creek, Iowa. 
Genera and Species. 
Spongida. 
Gen. and sp. undet 
Coleiiierata. 
Montieulipora lens 
gracilis 
quadrata 
sp. nndet 
Streptelasma corniculum 
Hydrozoa. 
Diplograptus peosta=amplexicaule 
putilln s 
Crinoidea. 
Heterocriniis lieterodactylus 
sp. undet 
Porocrinus crassus 
Cyst/idea. 
Lichenoerinus cratefiformis 
Polyzoa. 
Palesehara maculata 
sp. undet 
Brachiopoda. 
Leptfena sericea 
Lingula coburgensis 
daphne 
modesta 
progne 
whitfeldi 
Lingulella cineinnatiensis 
Ortiiis biforata 
emacerata 
fissicosta 
testudinaria 
Schizoerania filosa 
Strophomcna alternata 
rhomboidalis, var. tenuistriata. 
Tretiiatis sp. undet 
Zygospira modesta 
Lamellihranchiata. 
Cleidophorus neglectus 
Nucula fccunda 
Ptorinea demissa 
Tellinomya obliqua 
Pleropoda . 
Coleolus? sp. undet 
Conularia trontonensis 
Hyolithes i>arvius('ulu8 
Gasteropoda. 
Murcbisonia gracilis 
Pleurotomaria dcpauperata 
Rapbistoma micula 
Cephalopoda . 
Orthoceras sociale 
Annelida. 
Tentaculites stcrlingcnsis 
Cnistacea. 
Aridaspis cro!!Otus 
Calymene cflllicephala 
mMiumilnta 
Beyrichia sn. undet 
Plumnlites iamosi . . . . 
n 
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