BRACHIOPODA. 227 



Pander described thirty-one species of Porambonites, all of which were 

 directly absorbed by von Boch into the genus Spirifer of his conception* 

 De Verneuil, in the Geologic de la Russie,f included these species in his division 

 " Spirifer anormaux," section " Equirostres," corresponding to the section 

 " Bifort'S," which embraces species of the genus Platystrophia, King. This 

 author placed eleven of Pander's species under von Buck's Spirifer porambonites, 

 1840, and eight others as synonyms of Schlotheim's Terebratulites cequirostris, 

 18-0. 



After d'Orbigny's resuscitation of Pander's term,:}: and suggestion of the 

 relation of the genus to the rhynchonelloids, the name again became current,§ 

 SharpeII and EichwaldIT indicating the affinities of the shells to the pentame- 

 roids, the latter considering its position intermediate between them and the 

 Btrophomenoids. 



Davidson, in his Introduction to the Brachiopoda, placed Porambonites in a 

 family by itself, Porambonitidjs, regarding its pl.ace as between the Rbynchonel- 

 lwje and STRopiioMENin^. NoETLiNG elaborates this conception, placing Poram- 

 bonites and Pentamerus in one family, Porambonitid^, regarding the position 

 of this family as " between the STnonnoMENiD^, with which it is connected 

 through Porambonites, and the RarNCBONELLw^, by way of Pentamerus and 

 Camarophoria " (p. 378). 



After a careful study of Noetling's figures of the interiors of these shells, it 

 becomes evident that the most direct relationship to these fossils is to be 

 found in those pentameroids which have been designated as Parastrophia and 

 Anastrophia. The frequent great size and thickness of the shells of Poram- 

 bonites accounts for a certain degree of obscuration of interior detail, but in 

 all these genera we find the well-developed and supported spondylium in the 



 Beiti's^ zur Kenntiiias der Gebirgsforuiat. Russlands, p. 13. 1840. 



t Op dt., p. 127. 1845. 



J Paleontologie Fran^aise ; Terr. Cret., vol. iv, p. 345. 1847. 



} Meanwhile Kino, in ignorance of Pander's term, had proposed the name Isobhyncuus, with Schlot- 

 HBiM'g Spirifer (Bquirostris as the type. He found the genus bearing relation to Pentambrhs, Camaro- 

 phoria, etc. 



I Quarterly Journal Geological Society, vol. ix, p. 155. 1853. 

 ^ Lethsea rossica, vol. i, p. 793. 



