TYPE SPECIMENS OF INVERTEBRATE FOSSILS. 339 



5005. Isotelus planus DeKay. Plastotype. 



Utica (Ord.). Near Newport, Kentucky. 



Green, Mon. Trilobites N. America, Phila., 1832, p. 68. Cast 

 No. 23. 



= Isotelus platycephalus. 



4895. Isotelus stegops Green. Plastotype. 



Utica (Ord.). Newport, Kentucky. 



Green, Mon. Trilobites N. America, Phila., 1832, p. 71. Cast 



Nos. 26, 27. 



= Isotelus platycephalus. 



41902. Isotelus susse Whitfield. Plesiotype. 



Richmond (Ord.). Two miles east of Spring Valley, 

 Minnesota. 



Clarke, Geol. and Nat. Hist. Surv. Minn., Final Rept., Ill, Pt. 

 II, 1894, p. 708, figs. 10, 11. 



43376. Isotrypa ( PTectulipora ) gothlandica Ulrich. Holotype 



and figured sections. 

 Silurian. Island of Gotland, Sweden. 



Ulrich, Geol. Surv. 111., VIII, 1890, p. 678, pi. 54, figs. 6, 6c. 



18445. Isoxys chilhoweana Walcott. Cotypes. 



Lower Cambrian. Near Mont vale Springs, Chilhowee 

 Mountain, Tennessee. 



Walcott, Tenth Ann. Rept. U. S. Geol. Surv., 1S90, p. 626, pi. 

 80, figs. 10, 10a. 



35056. Jaekelocystis avellana Schuchert. Holotype. 



Manlius (Sil.). Near Keyser, West Virginia. 



Schuchert, Smithsonian Misc. Coll., Quart., XLVII, 1904, p. 226, 

 text fig. 28; pi. 37, figs. 11, 12. 



35055. Jaekelocystis hartleyi Schuchert. Cotypes. 



Manlius (Sil.). Near Keyser, West Virginia. 



Schuchert, Amer. Geol., XXXII, 1903, p. 231; Smithsonian 

 Misc. Coll., Quart., XX VII, 1904, p. 224, text fig. 27, pi. 37, 

 figs. 4-8. 



35057. Jaekelocystis papillatus Schuchert. Holotype and paratype. 



Manlius (Sil.). Near Keyser, West Virginia. 



Schuchert, Smithsonian Misc. Coll., Quart., XLVII, 1904, p. 225, 

 pi. 37, figs. 9, 10. 



41497. Jonesella crassa Ulrich. Cotypes. 



Black River (Ord.). St. Paul, Minnesota. 



Ulrich, Journ. Cincinnati Soc. Nat. Hist., XIII, 1890, p. 123, pi. 

 7, figs. na-c. 



= Ctenobolbina crassa. 



