C. A. Reeds — Hunton Formation of Oklahoma. 263 



Upper Henryhonse. 



Astylospongiaprcemorsa, Amplexus shumardi, Aulopora repens, 

 Calceola sp.,Cladopora reticulata, Eridophyllum rugosum, Fai>o- 

 sitesniagaroisis, Fa>wsites venustusri.v&v., Heliophyllumradicula, 

 Plasmopora foils, Thecia minor, Thecia major, Coccoseris micro- 

 pora, Heliolites interstinetus, Heliolites subtubulatus, Pisocrinus 

 milliganae, Synhathocrinus tennesseensis, Ascodictyon silurinense, 

 B ythotrypa of. distichia, Bythotrypa cf. squamata, Chilotrypa 4 

 sp., Crepipora n. sp., Fenestella cf. acuticosta, Fistulipora 2 sp., 

 Hederella sp., Leptotrypa n. sp., Lioclema 2 sp., Nicholsonella cf. 

 florida, Penniretepora cf. distichia, Rhopalonaria attenuata, 

 Anastrophia cf. internascens, Anoplotheca saffordi, Atrypa cf. 

 nodostriata, Camarotcechia ? neglecta, Hebertella fisslplica, Lep- 

 tcena sp. (European type), JViccleospira cf. lentiformis, Pholidops 

 sp., Rhynchonella n. sp., Rhynchospira globosa, Schuchertella 

 subplanus, Spirifer crispus, Strophonella tenuistriata , Uncinxdus 

 cf. nucleolata, Uncinidus cf. stricklandi, Amphiccelia sp., Platy- 

 stoma sp., Cyrtoceras subrectum, Orthoceras sp., Acaste cf. cfoio- 

 ingice, Dalmanites n. sp. 



Lower and Upper Henryhouse. 

 Striatopora sp., Lecanocrinus n. sp., Ceramopora sp., Fenes- 

 tella n. sp., Fistulipora hemispherica, Pachydictya crassa, 

 Anoplotheca saffordi, Pilobites saffordi, CamaroUechia whitei, 

 Dalmanella crassa, Dictyonella gibbosa, Gypidula roemeri, Gypi- 

 dula roemeri simplex n. var., Leptamisca. adnascens, Merista ten- 

 nesseensis, Pholidostrophia n. sp., Schuchertella subplanus roemeri, 

 Spirifer saffordi, Stropheodonta n. sp. (1), Strop honella laxipli- 

 cata, Calymene cf. earner ata. 



Plaragan bhale (Devonian). 

 The Haragan shale varies in thickness from to 166 feet, 

 with an average thickness of about 100 feet. The fossils indi- 

 cate that this variation in thickness is due chiefly to the unequal 

 rate of deposition of the beds over an uneven surface. It is 

 absent in the Lawrence anticline and Wapanucka syncline but 

 is represented in most of the remaining outcrops of the Hunton. 

 Excellent exposures may be found along the northeast border 

 of the mountains from Canyon creek south to Hunton and 

 Bromide. The prominent escarpment at the postoffice of 

 Hunton is of this shale. Excellent exposures containing 

 abundant fossils are to be seen in the "White Mound" region 

 along Haragan creek 3 to 4 miles southeast of Dougherty. 

 This is the type area, the formation taking its name from 

 Haragan creek which flows westward across the strike of 

 the formation about one-fourth mile north of " White Mound." 

 The term Haragan, which is used here as the formation name, 

 has been applied to an unnamed creek which may be seen 

 on the Ardmore quadrangle in Sec. 17, T. 2S., R. 3E. The 



