J> 



TYPE SPECIMENS OF PALEOZOIC FOSSILS 220, 



derbya Waagen 



Derbya keokuk Hall 

 61 ~*i° hypotype: hypoplastotype Orthis keokuk Hall. 

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



Derbya keokuk Hall 6c Clarke. Paleontology of 

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



Knobstone (Keokuk) group New Providence Ind. 



dignomia Hall 



Dignomia alveata Hall 

 1362 - a t £l type Lingula alveata Hall. 1 6th annual report of 

 the New York state cabinet of natural history. 1863. p. 25. 

 Hall. Paleontology of New York. 1S67. v. 4. pi. 2. 

 fig. 14. 



Dignomia alveata Hall. Notes on some new or 

 imperfectly known forms among the Brachiopoda, 1872. 



pl- i3' fi g- 3. 



Hall. 23d annual report of the New York state 



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



Hall 6c Clarke. Paleontology of New York. 1892. 

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



Hamilton shales Fultonham N. Y. 



W. If. Gabb, coll. 1 

 1 3^ > 5 ' V° hypotype Hall *N: Clarke. Paleontology of New York. 

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

 Hamilton shales Canandaigua lake. N. Y. 



J. M. Clarke purchase 

 1364 7 y ft 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 



'3^5 : '-f-- hypoplastotype Obolus conradi Hall. 20th an- 

 nual report of the New York state cabinet of natural 

 history. 1867. p. 368. 



Dinobolus conradi Hall <S: Clarke. Paleontology 

 of New York. 1S92. v. S, pt 1. pl. 4K. fig. 14. 



garan !aire la. 



