CATALOGUE OF FOSSILS. 89 



11. Archceocidaris cratis White. Confluence of Grand and Green 

 Rivers, Utah. Described on a following page. 



12. Arckaocidarw trudifer White. Confluence of Grand and Green 

 Rivers, Utah. Specimens consisting only of imperfect spines. 



13. Erisocrinus typiis Meek and Worthen. Confluence of Grand and 

 Green Rivers, Utah. The type specimens of Meek and Worthen were 

 obtained from the Coal-measures of Illinois, and consisted only of calyces. 

 Ours shows about two and a half centimeters in length of the arms, each of 

 which consists of a double, interlocking series of pieces ; the arms when 

 closed lying so closely together as to leave only a linear suture between 

 them. 



14. Scapliiocrinus carlonarius Meek and Worthen. Confluence of 

 Grand and Green Rivers, Utah. 



1 5. ^Eiipacliycrinus platylasis White. Confluence of Grand and Green 

 Rivers, Utah. Described on a following page. 



16. Polypora f. Confluence of Grand and Green Rivers, Utah 



A large specimen, having unusually large fenestrules. Obverse side only 

 shown. 



17. Fenestella ?. -Near Echo Park, Utah. Obverse side only 



shown. 



18. Archimedes ?.- Near Echo Park, Utah. Specimens consist 



of two axes only, one of which is dextral and the other sinistral in its volu- 

 tions. They are, however, both referred to one species. 



] 9. Discina f. Bee-hive Point, near Horseshoe Canon, Utah. 



A single lower valve. 



20. Productus panctatus Martin. Confluence of Grand and Green 

 Rivers, Utah. 



21. Prodiictus longispinus Sowerby ?. Near Echo Park and at the con- 

 fluence of Grand and Green Rivers, Utah. 



22. Prodiictus costatus Sowerby? Near Echo Park, Utah. The speci- 

 mens consist of the ordinary American forms generally referred to that 

 species, but are probably distinct from it. 



23. Prod net us costatus var. Near Echo Park, Utah. Like No. 22 in 



