210 PALEONTOLOGY OF NEW YORK. 



Gen08 RHYNCHOPORA, King. 1856. 



PLATE LVin. 



1844. T^nbratula, db Vbrnrdil. Bull, de la Soc. g&ol. <le France, vol. i, p. 27. 



1845. IWebnUula, dk Vbrnkuii,. Guol. de la Russ. et dea Mont, de I'Oural, p. 83, pi. x, figs. 5 a, 6. 

 1848. T^rebratula, Gbinitz. Verstein. dea deutsch. Zechateingeb., p. 12, pi. iv, fig-s. 41, 42. 



1856. Bhynchopora, Kino. Annals and Magazine of Natural History, second series, vol. xvii, p. 506, 

 pi. xii, figs. 7-11. 



1860. Rhynchonella, Whitk. Jour. Boston Soc. Nat. Hist., vol. vii, p. 236. 



1861. Rliyiuhonella, Gbinitz. Dyas, p. 83, pi. xv, figs. 29-32. 



1880. Wiyttchopiira, Davidson. British Carb. Bracbiopoda, Suppl., p. 286, pi. xxxiii, figs. 11 a-c. 



1886. Rhyiwhopvra, Tkchkrnyschkw. Permsky Eavestnyace Kostromskoy Guberny, p. 21, pi. iii, 



fig. 20 i pi. v, figs. 34-36. 



1887. KhynchoporiiM, CEhlbrt. Fischer's Manuel de Conchyliologie, j). 1305. 



There are very few rhynchonelloid species in the Carboniferous and Permian 

 faunas which, without evincing any essential difference from Camarot(echia in 

 the character of the internal apophyses, possess a strong shell-punctation, not 

 merely superficial but extending quite through the thickness of the valves. 

 To one of these shells, Terebratula Geinitziana, de Verneuil, King gave the name 

 Rhynchopoea, in 1856; a Permian species described from Russia, though the 

 examples upon which King established its generic characters were obtained 

 from the Zechstein of Germany (Ropsen). Dr. Geinitz had identified de 

 Verneoil's species in 1848,* and in 186 If in the German faunas, and Tscher- 

 NYSCHEwJ has more recently shown that the Russian specimens possess the shell 

 punctation, so that there is no reason to doubt the specific identity of the type. 

 None of the figures which have been given of this species nor of the R. Nikitini, 

 T8chernyschew,§ also from the Permian, nor of the R Youngi, Davidson,|| from 

 the Upper Carboniferous limestone of Ayrshire, show the interior characters 

 of the shells. From an examination of the only American species which can 

 now be referred to Rhynchopora, namely, Rhynchonella ptistulosa, White, of the 

 Burlington limestone, it appears that the teeth are supported by conspicuous 

 vertical lamellae, the septum of the brachial valve well developed and the 



*Die Versteinerangen dea deutacben Zecbsteingebirge, p. 12, pi. iv, figs. 41, 42. 



t Dyaa, p. 83, pi. xv, figa. 29-82. 



I Op. cU., p. 21. 



} Op. eit,, p. 21, pi. v, figs. 84-36. 



I Suppl. Carboniferous Bracbiopoda, p. 286, pi. xxxiii, figs. 11 a-e. 



