470 ROBERT TRACY JACKSON ON ECHINI. 



Phillips, John. 



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 Pomel, Auguste. 



1869. Revue des echinodermes. Paris: p. i-lxvii. 



1883. Classification methodique et general des echinides vivants et fossiles. Alger: p. 1-132, 1 pi. 

 Portlock, J. E. 



1843. Report on the geology of the County of Londonderry . . . . , p. i-x.\xi, 1-7S4, pi. 1-38, pi. A-I, 

 geological map. 

 Prouho, Henri. 



1887. Recherches sur le Dorocidaris papillata et quelques autres echinides de la Mediterran^e. Arch. 

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 Quenstedt, F. A. 



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1820. Memoire di storia naturale. Bologna: 4to, p. i-iv, 1-104, pi. 1-6. 

 Ribaucourt, Edouard de. 



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 Ritchie, James, and Mcintosh, D. C. 



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 646-661, 5 text-figs., pi. 33. 

 Roemer, Ferdinand. 



1852-'54. Palaeo-Lethaea, Pt. 2, Kohlen-Gebirge. In Bronn's Lethaea Geognostica. Stuttgart: vol. 



1, p. 1-788; atlas, 1850-'56, pi. i-x. 

 1855. Ueber den Bau von Melonites multipora, ein Echinid des Amerikanischen Kohlenkalks. Arch, 

 f. Naturg., vol. 21, pt. 1, p. 312-330, pi. 12. 



(Reprinted in 1856, with an altered title, with pagination 1-18 and without plate.) 

 Safford, J. M. 



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 Salter, J. W. 



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 Salter, J. W. See Forbes, Edward. 

 Sandberger, Guido and Fridolin. 



1850-'56. Systematische Beschreibung und Abbildung der ^'ersteinerungen des Rheinischen Schichten- 

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