Un trattato di malacologia; o, conchiglie e guscio pesce . hidcp, mostrando il primo sviluppo ofa pilastro centrale. Osservazioni Lamarcks su gruppo thisinteresting, che contiene molti sub naturale-generi, ci appaiono caratteristici di quel preciso per cezione, quasi intuitivo di naturale afl!inities andrelations che caratterizza tutti i suoi scritti prima di cecità hisunfortunate, - un raro talento di discriminazione,che, come giustamente è stato osservato da altri, placeshim, a questo proposito, molto al di sopra anche l'autore di theRegne animale. Anche se non aveva il advantageof conoscere wit

• Collaboratore: The Reading Room / Alamy Foto Stock
• ID dell’immagine: 2AKKYRA
• Dimensioni dei file: 7,2 MB (249,9 KB Download compresso)
• Liberatorie: Modello - no | Proprietà - no
• Dimensioni: 2345 x 1066 px | 39,7 x 18,1 cm | 15,6 x 7,1 inches | 150dpi

Altre informazioni

Questa foto è un'immagine di pubblico dominio, il che significa che il copyright è scaduto o che il titolare del copyright ha rinunciato a tale diritto. Alamy addebita un costo per l'accesso alla copia ad alta risoluzione dell'immagine.

Questa immagine potrebbe avere delle imperfezioni perché è storica o di reportage.

A treatise on malacology; or, Shells and shell fish . hidcp, by showing the first developement ofa central pillar. Lamarcks observations upon thisinteresting group, which contains many natural sub-genera, appear to us characteristic of that accurate per-ception, almost intuitive, of natural afl!inities andrelations which characterised all his writings before hisunfortunate blindness, — a rare talent of discrimination, which, as it has been justly observed by others, placeshim, in this respect, far above even the author of theRegne Animal. Although he had not the advantageof being acquainted with the animal, made known tous by the unpublished drawings of Guilding* (ofwhich the annexed cut is a copy, fig. 42.), he con-sidered this genus, not related (by affinity) to Patella, but that its incipient spire and pillar indicated a struc-ture approaching to that of Trochus. He erred, appa-rently, in carrying this theory too far, by supposing * The typical form is probably C. Chinensis, the species here figured. 234 SHELLS AND SHELL-FISH. PART I.. that his C. trocMformis would he hetter placed in thatfamily. But even the errors of such a man are aslights to others; for when douhts exist as to the limitsof a genus, we may be perfectly sure of the passage, and that both genera are natural. On the other hand, if we look to the resemblance between Patella andCalyptrcBa as analogical, these conflicting opinions areat once reconciled : both are cup-shaped, pyramidical, and with the apex almost central; and that both standopposite to each other in their respective circles, theintelligent reader will perceive if he brings these fa-milies into comparison. (217.) The next group, which, from a considerationof the animal, we have here named Cheltnotus, cor-responds, in some measure, to Sigaretus of authors.We find it impossible, however, to understand thisgroup. It has been customary to place in Sigaretusnearly all those ear-shaped shells of the same form asStomatia, but which are not perl

Parole chiave associate all'immagine

• bookcentury1800
• bookdecade1840
• booksubjectmollusks
• bookyear184