XVI CONTENTS. 



PAGE 



Adanson, 510— 513 : GeoftVoy and Miillcr, 513, 514: Linnaaus, 515, 

 516 : Bruguierc, &c., 517 : Humphrey, 517 : Cuvicr, 518 — 521 ; Poll, 

 his classification of bivalves, 518, 519. .... 492 



LETTER XXVII. 



History of Conchology continued : Cuvier's first classification 

 of the Mollusca, 522, 523 ; Lamarck, his first system, 524 — 

 526 : Cuvier in 1800, 526, 527 : M. de Roissy, 528 : Defrance, 528 : 

 Lamarck in 1809, 529—531 ; and in 1816, 531—538 : his system of 

 the Tunicata, 532 ; of the Conchifera, 533 ; of the Mollusca, 534—538 : 

 Cuvier in 1817 and 1830, 638 : M. de Ferussac, 539 ; M. de Blain- 

 ville, his system, 539 — 547 : of the Cephalopoda, 540 : of the Gastero- 

 pods, 542 — 545 : of the Accphalcs, 545 — 547 : of the Malentozoaria, 

 547 : system of Latreille, 547 — 549 : of Schvveigger, 550 — 554 : con- 

 dition of Conchology in Britain, 554 : Leach, 555 : Fleming, 555 — 560 : 

 J. E. Graj', 560 — 567 : remarks on his system, 567 — 569 : classifica- 

 tions of the Tunicata, 569 : of M. Savigny, 570, 571. . . .522 



LETTER XXVIII. 



History of Conchology continued : Cuvier, 572 : Macleay, 573 : 

 Swainson, his system, 573 — 579 ; Sander Rang, 579 — 583 ; Cephalo- 

 pods, 583 : De Haan and D'Orhigny, 583 : Owen, his classification, 

 584, 585 : Pteropods, 585 : J. E. Gray, 585, 586 : Gasteropods, 586 : 

 Sander Rang, 586, 587 : J. E. Gray, 587—589 : Milne-Edwards, 589 

 —593 : Emile Blanchard, 593, 594.— The Nudibranches, 594 : their 

 arrangement by M. de Quatrefages, 595, 596 : Phlebenterata, 596 : by 

 Allman, 597, 598 : by Alder and Hancock, 598, 599 : Acephala, 599 : 

 the rank of the Brachiopoda, 599 : Deshayes' classification of the 

 Conchifera, 599 — 602. — The Tunicata, 602 : their rank and classifica- 

 tion, by Macleay, 603, 604 : by Milne-Edwards, 604 : by Forbes and 

 Goodsir, 605 : Conclusion, 605, 606. . . . , .572 



