90 INVERTEBRATE PALEONTOLOGY. [WHITE. 



essential characters, except that the radiating costse are reduced in size to 

 that of raised striae. 



24. Productus Prattenianus Norwood. Confluence of Grand and Green 

 Rivers, Utah. Some of the specimens possess the median row of spines or 

 nodes upon the ventral valve, like those which Dr. Newberry named P. 

 nodosus. 



25. Productus semireticulatus Martin. Confluence of Grand and Green 

 Rivers, Utah. All the examples are of the variety named P. Ivesii by Dr. 

 Newberry. 



26. Productus Nebrascensis Owen. Confluence of Grand and Green 

 Rivers, Utah. 



27. Productus muricatus Norwood and Pratten. Near Echo Park, Utah. 



28. Productus multistriatus Meek. Confluence of Grand and Green 

 Rivers, Utah. 



29. Chonetes granulifcra Owen. Confluence of Grand and Green 

 Rivers, Utah. 



30. Chonetes platynota White. Near Echo Park, Utah. 



31. Hemipronites crinistria Phillips. Near Echo Park and at the con- 

 fluence of Grand and Green Rivers, Utah. It also occurs in the Upper 

 Aubrey Group. (See No. 49.) 



32. Meekella striatocostata Cox. Confluence of Grand and Green 

 Rivers, Utah. 



33. Spirigera sultilita Hall. Confluence of Grand and Green Rivers, 

 and near Echo Park, Utah. Occurs also in the Upper Aubrey Group. 

 (See No. 50.) 



34. Spirifer cameratus Morton. Confluence of Grand and Green Rivers, 

 Utah. 



35. Spirifer Eockymontanus Marcou. Split Mountain Canon and near 

 Echo Park, Utah. Occurs also in the Upper Aubrey Group. (See No. 51.) 



36. Spiriferina Kentuckensis Shumard. Confluence of Grand and Green 

 Rivers, Utah. Occurs also in the Upper Aubrey Group at the same locality. 

 (See No. 52.) 



37. Avicidopecten occidentalis Shumard. Two miles above Belle view, 

 Utah. 



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