Part 2: Researches on the Foraminifera

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                                Genus

<u>Orbiculina</u>
Received June 19 - 1856. Read June 19


78. <u>History</u>.- The Interesting group of organisms be-
longing to this type seems to have early attracted notice,
probably on account of the great abundance in which
it presents itself on the sands of many of the West In-
dian shores.  Three species are described and figured by
Fichtel<u>l</u> and Moll <sup>1</sup>, under the names of <u>Nautilus orbiculus</u>,
<u>N.angulatus</u>, and <u>N.aduncus</u>. Lamarck, however, in his
first systematic treatise, <sup>2</sup> separated them from <u>Nautilus</u>, and
raised them to the rank of an independent genus, to which
he gave the name of <u>Orbiculina</u>; and he also changed the
<s>names of</s> two of the specific names, the three standing respec-
tively as <u>O. numismalis</u>, <u>O.angulata</u>, and <u>O.uncinata</u>. By
Denys de Montfort, <sup>3</sup> these species were raised to the rank of
independent genera, under the names of [<u>Helenis</u>?], <u>Archaias</u>,
and <u>Ilotes</u>; but these genera have not been adopted by any other
systematist. M. d'Orbigny, <sup>4</sup>   in his first classification of the
Foraminifera, not merely adopted Lamarck's generic designa
tion, but affirmed that the three reputed species were really
nothing else that one and the same organism in different
- - - - - - - - 
1. Testacea Microscopica; Vindob. 1798
2. Système des Animaux sans Vertèbres; Paris, 1801
3. Conchyliologie Systematique; Paris, 1808
4. Tableau Méthodique de la Classe des Cephalopodes; Paris,
1825
                            
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Manuscript details

Author
William Benjamin Carpenter
Reference
PT/53/8
Series
PT
Date
1856
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Part 2: Researches on the Foraminifera, 1856. From The Royal Society, PT/53/8

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