FAMILY 1. FORAMINIFERA. 293 
this single division; they no doubt attracted his attention from their 
superiority of size, though still excessively diminutive, and were referred 
to the genus Nautilus on account of their multilocular construction. The 
following are the genera into which this group is divided by D’Orbigny : 
Nodosaria, Lingulina, Frondicularia, Rimulina, Vaginulina, Marginulina, 
Planularia and Pavonina ; and the first of these is again subdivided 
into Nodosaria (including Orthocera of Lamarck), Glandulina, Dentalina, 
Orthocerina and Mucronina. The whole of the Foraminifera, indeed, 
exhibit such extreme variations of structure, that they may be verily 
divided ad infinitum*. 
Examples. 
Pl. CCXCVII. Fig. 13. 
NoposaRIA sTRIATI-coLiis, D’Orbigny, Mollusques des Iles Canaries, 
Foraminifeéres, pl. 1. f. 2 to 4. 
Pl. CCXCVIL. Fig. 14. 
NoposarIia CARINATA, Nobis. 
Lingulina carinata, D’Orbigny, Tableau Méthodique des Céphalopodes, 
p- 91; Foraminiféres de Cuba, p. 20; des Iles Canaries, pl. 1. f. 5 
and 6. 
Orthoceratia zoophitica subcordiforma, Soldani. 
Pil. CCXCVIT. Fig. 15. 
Noposaria BertHeLoTiana, Nobis. 
Marginulina Berthelotiana, D’Orbigny, Mollusques des Iles Canaries, 
Foraminiféres, pl. 1. f. 14 and 15. 
* Our observations on these heterogeneous creations are gleaned entirely from the elabo- 
rate memoirs of De Haan, D’Orbigny and Deshayes. Being somewhat incredulous of the 
zoological affinity which these writers assign to them, and neither dexterous in theory nor 
skilful in micrography, we have disposed of them somewhat summarily. Our drawings are 
taken from the plaster models so ingeniously constructed by D’Orbigny, upon a highly mag- 
nified scale. 
VOL. II. 2a 
