BRACHIOPODA. 
227 
Pander described thirty-one species of Porambonites, all of which were 
directly absorbed by von Buck into the genus Spirifer of his conception."^ 
De Verneuil, in the Geologie de la Russie,f included these species in his division 
“ Spirifer anormaux,” section “ Equirostres,” corresponding to the section 
“ Bifores,” 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 aquirostris, 
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,§ 
Sharpe II and EichwaldIT indicating the affinities of the shells to the pentame- 
roids, the latter considering its position intermediate between them and the 
strophomenoids. 
Davidson, in his Introduction to the Brachiopoda, placed Porambonites in a 
family by itself, Porambonitiv^, regarding its place as between the Rhynchonel- 
lAD^ and STRopnoAfENiDAs. Noetling elaborates this conception, placing Poram¬ 
bonites and Pentamerus in one family, Porambonitida:, regarding the position 
of this family as “ between the StrobiwmeiVida:, with which it is connected 
through Porambonites, and the RriYNcnoNEiLiDA:, 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 
* Beitrag zur Keniitiiiss der Gebirgsfoi uiat. Riisslands, p. 13. 1840. 
t Op cit., p. 127. 1845. 
J Paleontologie Fran^aise ; Teri’. Orel., vol. iv, p. 345. 1847. 
§ Meanwhile King, in ignorance of Pander’s term, had proposed the name Isohhynciids, with Schdot- 
iieim’s Spirifer (Bquirostris as the type. He found the genus bearing relation to Pentamerus, Camaro¬ 
phoria, etc. 
1 Quarterly Journal Geological Society, vol. ix, p. 155. 1853. 
Lethaea rossica, vol. i, p. 793. 
