Xll 



I cannot conclude this reference to the figures without expressing my warm acknow- 

 ledgments to Mr. George West, for the unwearied pains and great skill with which he has 

 executed them from the actual specimens, as well as for the important aid which, in many 

 cases, I have derived from his intelligent observations on points of structure to which his 

 attention was drawn in the execution of his work, and which would otherwise probably 

 have escaped my notice. 



The following are the principal Works or Papers to which reference has been made : 



ALDER, JOSHUA. 'A Catalogue of the Zoophytes of Northumberland and Durham ;' 8vo, Newcastle, 1857. 

 BLAINVILLE, H. M. D. DE. 'Manuel d'Actinologie ou de Zoopbytologie ;' 8vo, Paris, 1834. 

 BUSK, G. ' Catalogue of Marine Polyzoa in the Collection of the British Museum ;' 12mo, London, 1852. 

 BRONN, H. G. ' Lethsea geognostica oder Beschreibung uud Abbildungen der fin- die Gebirgs-Forma- 



tionen bezcicbnendsten Versteinerungeu ;' 8vo, Stuttgard, 2de Aufl. 1838. 

 ,, ' System der urweltlichen Pflanzenthiere, durch Diagnose, Analyse, uud Abbildung der 



Geschlechter erlautert ;' fol. Heidelb., 1825. 



Bosc, L. A. G. ' Histoire naturelle des Vers ;' 18mo, Paris, 2de Ed. 1830. 

 COUCH, R. Q. 'A Cornish Fauna,' &c. ; 8vo, Truro, 1844. 

 DAWSON, J. W. ' Additional Notes on the Post-Pliocene deposits of the St. Lawrence Valley ;' 8vo, 



Montreal, 1S59. 



D'ORBIGNY, ALCIDE. ' Paleontologie Fran9aise. Description zoologique et geologique de tous les animaux 

 mollusques, et ray o tines fossiles de France. (Terrains Cretaces et Jurassiques ; 

 Planches) ;' 8vo, Paris, 1840-53. 

 ,, ' Recberches zoologiques sur la classe des Mollusques Bryozoaires,' "Ann. d. Sc. Nat.," 3 ser., 



t. xvi and xvii, 1851. 

 DUNKER u. KOCH. ' Beitrage zur Kentniss desuorddeutscbeu Oolithgebildes und dessen Versteinerungeu; 1 



4to, Brunswick, 1837. 



ELLIS J. 'An Essay towards a Natural History of the Corallines,' &c. ; 4to, London, 1/55. 

 ESPER, E. J. C. 'Die Pflauzenthiere in Abbildungen uach der Natur, nebst deutlicber Besclm-ibungen ;' 



4to, Nuremberg, 1791-98. 



GOLDFUSS, G. A. ' Petrefacta Germanise,' &c. ; fol. Dusseldorf, 1826-33. 

 GRAY, J. E. ' Spicilegia Zoologica ;' pt. 1, 1828. 

 HAGENOW, F. v. 'Die Bryozoen der Maastricbter Kreidebildung.' 



,, '"Bryozoen," in Geinitz, Gnindriss der Versteineruugs-Knnde ;' Svo, Dresden, 1846. 



JOHNSTON, Gi:o. ' History of British Zoophytes ;' 3d edition, Svo, London, 1847. 



LAMARCK, J. B. P. A. DE. 'Histoire naturelle des Animaux sans Vertebres ;' 2>1 edition, Svo, Paris, 1836. 

 LAMOUROUX, J. 'Exposition methodique des Genres de 1'ordre des Polypiers,' &c. ; 4to, Paris, 1821. 

 LONSDALE, W. ' Account of six species of Polyparia obtained from Timber Creek, New Jersey,' " Journ. 



Geol. Soe.," vol. i, p. 65, 1845. 

 ,, ' Report on the Corals from the Tertiary formations of North America,' ibid., p. 495. 



