NiCKLEs AND BASSLER.] DIAGNOSES OF GENP:RA. 55 



FOREIGN GENERA. 



A number of generic terms, founded for species occurring in Euro- 

 pean Paleozoic deposits, have been proposed in European publications, 

 but have not found their way into American literature. A list of 

 these is subjoin(»d, though it is scarcely probable that the list is com- 

 l)lete. A considerable number of these generic terms appeared before 

 luituralitsts had begun to feel the necessity for precise and complete 

 diagnoses and descriptions, so that it is not possible to tit them into 

 our present classification. When the material is examined upon which 

 they were based, most of these early genera will be found to occupy 

 the same ground as genera founded much later and now in current use. 

 Scarcely any of the genera listed below have received a second treat- 

 ment, so that nothing has been added to the original unsatisfactory 

 descriptions. We have thought that it might not be amiss to hazard a 

 guess, based on descriptions and figures, both commonly lacking defi- 

 niteness, as to what these genera may prove to be. 



AcANTHOPORA Youug and Young. 



Acantliopora Young and Young, Proc. Nat. Hist. Soc. Glasgow, II, 1875, p. 327; Vine, 

 Proc. Yorkshire Geol. Polyt. Soc, IX, 1885, p. 83. Genotype: Glauconome {Acan- 

 thopora) steUipora Young and Young, Proc. Nat. Hist. Soc. Glasgow, II, 1875, p. 

 327, pi. iv, 25, 26. 



This subgenus seems to be based upon the perfect condition of the 

 aperture of Pinnatopora^ a feature of not even specitic importance. 

 However, the name would drop anyway, as it was used by D'Orbigny, 

 Prodr. de Pal., I, 1850, p. 318. 



Amorphotrypa Whidborne. 



Amorplwirypa Whidborne, Devonian Fauna England, II, Part 4, 1895, p. 181 (Pal. Soc. 

 Publ., XLIX). Genotype: Isotrypa? Gregorii Whidborne, loc. cit., p. 181, pi. 

 XX, 1-2 e. 



This genus, whose structure can not be said to be fulh^ understood 

 as yet, seems closely related to Isotrypa. It is a member of the 

 Fenes tell idee. 



Arch^eopora Eichwald. 



Archxopora Eichwald, Lethsea Rossica, 1, 1860, p. 405. 



Eight species are given by Eichwald under this genus, which appears 

 to cover some of the ground, at least, which is now included in Cullo- 

 pora Hall. 



Chasmatopora Eichwald. 



Chasmatopora Eichwald, Lethsea Rossica, 1, 1860, p. 370. Only species given: C. len- 

 dla Eichwald, loc. cit., p. 371. 



This appears to be a Phylloponna. 



