. Contributions to geology. et memo par le caractere artificiel, tire de la forme deIouverture. Cest done pour me conformer a ce que a ete fait, i&c. * Some time after the observation and note were made upon this genus,I observed in M. Payraudeaus excellent work on the recent shells ofCorsica, the description and figure of the Melania Camhcssedesii, No. 234,which naturally belongs to the genus Pa^i^^ea. He says, jaurais pucreer un genre nouveau pour cette espece qui nest point, comme lesvraies Melanies, une coquille fluviatile, mais marine. After some fur-ther observations, he proposes to make
. Contributions to geology. et memo par le caractere artificiel, tire de la forme deIouverture. Cest done pour me conformer a ce que a ete fait, i&c. * Some time after the observation and note were made upon this genus,I observed in M. Payraudeaus excellent work on the recent shells ofCorsica, the description and figure of the Melania Camhcssedesii, No. 234,which naturally belongs to the genus Pa^i^^ea. He says, jaurais pucreer un genre nouveau pour cette espece qui nest point, comme lesvraies Melanies, une coquille fluviatile, mais marine. After some fur-ther observations, he proposes to make a division of the genus Melaniafor these marine species. I believe it is now universally conceded, thatthere would be an impropriety in placing in the same genus tiiose ani-mals whose habits lead them to breathe salt water with those whichbreathe fresh water or air alone. When the animal is so organized as tobe capable indifferently of breathing both, as in the migratory fishes, it isa very diffcront matter. PLATE DtT^LA SHiUairii 9 _* pibhoya. UH5 ! > } I?l) 1 . Citrtruit-**- PASITIIKA jtcaU *Vl ! j^einitiaiuta U)T Ile}iru-4 1>1 liiiiafu .... maotw intihilu ■•)<.t 108 ovniibun. 1-2 c Ut^ubfis •V ^. .... IdH ele{lrUKi J SI )• ■ kI-IIiITOMV r/rUini acicuiaUi VtO AlTKON punctiinis lid ,\int£i/a^tm lt\ sbiaca 1)1 Uui-Otltx III •n^iiui/.iatiti. .l pytfirurris ii:^ nttnut r>!» Utniintihau NATIOA stiiala. hVi Sl-At,AKI i.\ plantU/iUt iir> ■ ISO rtiiieSit. \\}\\ fm-inata Mil ni(\ itri-a/it- L,l yibtufita- mlllma K> I iiKU-iim i:la ,,Lm., UK IIM IIW 1 t» TO GEOLOGY. 101 third the length of the shell; columella smooth, somewhatthickened at base; outer lip edged
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Keywords: ., bookcentury1800, bookdecad, booksubjectpaleontology, bookyear1833
