GENUS PENEEOPLIS: — HISTOEY AND DISTEIBUTION. 
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fication of those pores. For he goes on to state, “ Cette coquille est encore pellncide, et 
permet de lire an travers de son tet la serie et la disposition des nombreuses cellules de 
chaque concameration ; ces cellules deviennent plus grandes a mesure que la coquille prend 
plus d’accroissement. II est probable que leur nombre repond a celui des animaux qui les 
babitent, et qui les constituent simrdtanement pour former un nouveau rang.” This sub- 
division of the principal chambers into cells, each occupied by a separate animal, exists 
only in the imagination of Moxtfoet, who seems to have been misled by the peculiar 
markings of the surface of the shell, which, as will be presently seen, are merely superficial. 
La^iaeck, not adopting Montfoet’s genus, referred the Nautilus 'glojuatus of Fichtel and 
Moll to the genus (Ji'istellaria, with which it has no relationship whatever ; and having 
copied theii’ figiu’esinto the ‘ EncyclopedieMethodique*,’ he designated one set of forms 
as C. jplanata, and another as C. dilatata, subsequently reuniting them, however, under 
a new specific name, C. squammula^. The genus Peneroplis has been recognized by 
Blaixville J and by EheejVBEEG^ ; and D’Oebigot has applied this name, in his various 
writings on Foraminifera, to the form described by Fichtel and Moll, whilst he has 
created a new generic term, Bendritina, for a series of closely allied forms, in which 
there is a single large dendritic aperture instead of a linear series of separate apertures. 
The distinctive characters of these two genera, as last given by him||, are as follows: — - 
“ Peneroplis ; coquille nautiloide comprimee, pourvue de nombreuses ouvertures sur 
une seule ligne a la demiere loge seulement. Cavite simple : — Bendritina ; ce sont des 
Peneroplis dont les ouvertures anastomosees ferment une dendrite.” In addition to 
these, I shall cite his definition of another genus, established by Lamaeck in 1801, 
which, as I shall presently show, consists, like Bendritina, of mere varieties of Pene- 
roplis : — “ Spirolina ; coquille nautiloide dans le jeune age, projetee en crosse dans I’age 
adulte.” 
122. The genus Pmercplis is very widely difiiised through warmer latitudes ; indeed 
few collections of Foraminifera from sands or dredgings taken from the Mediterranean, 
the ^gean Ai’chipelago, the Red Sea, the East or West Indies, the Philippine seas, or 
the shores of Australia or the Polynesian Islands, will fail to present numerous examples 
of it. A few specimens have been found on British coasts ; but it is surmised by Pro- 
fessor AYilliaaison that these have been brought by the Gulf-stream from the West 
Indian Seas. “ Amongst the multitude of West Indian seeds and other light objects 
thus thrown upon our north-western shores, it was to be expected that some of the 
tropical Foraminifera would be entangled ; and such may have been the case with the 
species under consideration^.” The finest examples I have met with were contained in 
* Tab. 467, figs. 1, «, c, 2 ; a, 5, c. t Animaux sans Vertebres, tom. vii. p. 607. 
X Malacologie, p. 372. 
§ “ Tabellarische Charakteristik der Bryozoen-Classe imd sammtlicher Eamilien und Gattungen der 
Polytbalamien,” in Berlin Transactions, 1838. 
II Cours Elementaire de Paleontologie, 1849, tom. ii. p. 198. 
^ On the Eecent Eoraminifera of Great Britain, published by the Eay Society, 1858, p. 46. 
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