TYPE SPECIMENS OF PALEOZOIC FOSSILS 



229 



derbya Waagen 



Derbya keokuk Hall 

 1361 ^i ^- hypotype: hypoplastotype Orthis keokuk Hall. 



Geological survey of Iowa. 1858. v. 1, pt 2, p. 640. 



Derbya keokuk Hall & Clarke. Paleontology of 

 New York. 1892. v. 8, pt 1, pi. 1, fig. 1, 2. 



dignomia Hall 



Dignomia alveata Hall 

 1362 7 Y° type Lingula alveata Hall. 1 6th annual report of 



the New York state cabinet of natural history. 1863. p. 23. 



Hall. Paleontology of New York. 1867. v. 4, pi. 2, 

 fig. 14. 



Dignomia alveata Hall. Notes on some new or 

 imperfectly known forms among the Brachiopoda. 1872. 

 pl- 13. % 3. 



Hall. 23d annual report of the New York state 

 cabinet of natural history. 1873. pl. 13, fig. 3. 



Hall & Clarke. Paleontology of New York. 1892. 

 v. 8, pt 1, pl. 1, fig. 24. 



Hamilton shales Fultonham N. Y. 



W. M. Gabb, coll. 1857 



*3 6 3 :LJ ^ Q - hypotype Hall & Clarke. Paleontology of New York. 

 1892. v. 8, pt 1, pl. 1, fig. 25. 



J. M. Clarke purchase 



1364 JL ¥ Jl hypotype Clarke. 13th annual report of the New York 



state geologist. 1894. v. 1, pl. 4, fig. 1. 



Upper Hamilton shales Livonia salt shaft, Livonia N. Y. 



D. D. Luther, coll. 1891 



dinobolus Hall 

 Dinobolus conradi Hall 



1365 hypoplastotype Obolus conradi Hall. 20th an- 



nual report of the New York state cabinet of natural 

 history. 1867. p. 368. 



Dinobolus conradi Hall & Clarke. Paleontology 

 of New York, 1892. v. 8, pt 1, pl. 4B, fig. 14. 



Knobstone (Keokuk) group 



New Providence Ind. 



Hamilton shales 



Canandaigua lake, N. Y. 



Niagaran 



Near Le Claire la. 



