LIST OF ILLUSTRATIONS. 



FIG. 



22. 



23. 



24. 



25. 

 26. 



27. 



28. 



29. 

 30. 

 31. 

 32. 



33- 

 34- 

 35. 

 36. 



37- 

 38. 



39. 



39«. 



40. 



41. 



42. 



43. 



44. 



44a. 



45. 



46. 



47. 

 48. 



49. 

 50. 

 SI. 

 52. 

 53. 

 54. 

 55. 



55«- 

 56. 



57. 

 58. 

 59. 

 59<?. 

 60. 

 61. 

 62. 



Billings) 



ites 



le or rioat 



(/5/ 



yozoan 

 eroscopic 

 'iiWus (Ed 



cells 

 ward 



Stromatopora concentrica 



Cannopora planulata ...... 



Archaocyathus miuganeiisis. A Primordial rrotuzoon 



Receptaculites. Restored 



Section of Loftiisia Persica. An Eocene Foraminifer 



Foraminiferal Rock Builders, in the Cretaceous and Eocene 



Frontispiece. A Cambrian Trilobite (ParadoxiJes micmac) 



Group of Cambrian Animals ..... 



Portion of skeleton of Hexactinellid Sponge (Caiop/yc/iimii) 



Protospongia fcnestrata (Salter) 



Astylospongia pncmorsa (Roemer) 



Spicules of Lithistid Sponge {Trichospongia 



Oldhatnia antiqua (Forbes) 



Didyomma sociale. Enlarged 



Didyonema Webster i (Dn.) . 



Group of modern Hydroids allied to Graptol 



Silurian Graptolitida; .... 



Central portion of Graptolite, with membra 



chogiapstis odobrachiatus. Hall) 

 Ptilodictya acuta (Hall). Bryozoan 

 Fenestella Lyelli (Dn.). A Carboniferous B 

 Chaetetes fibrosa. A Tabulate Coral with m 

 rt, Stenopora exilis (Dn.). b, Chaetetes tur 



and Haine) ..... 

 Living Anthozoan Coral {Astttra) 

 Tabulate Corals (Halisites and Favositfs) 

 Rugose Coral (Heliophyllum Halli) 

 Zaphrentis prolifica (Billings) 

 Rugose Corals {Zaphrentis Minas, Dn., and 



Jiillingsi, Dn.) .... 



Modern Crinoid {Rhizocrinus Lofotensis) 

 Palccaster Niagarensis (Hall) 

 Palcechinus ellipticus (McCoy) 

 Pletirocystites sqtiamosus 

 Heterocrimis simplex (Meek) 

 Body of Glyptocrinus .... 

 Fxtracrimis Briareus .... 

 Pentacrinus caput-medusce 

 Lingtda anatina .... 



Cambrian and Silurian Linguloe . 

 Terebratula sacculus (Martin) 

 Discina Acadica (Hartt) 

 Brachiopods; genus Of this . . . 

 Rhynchonella increbrescins (Hall) 

 Spirifer mucronatus (Conrad) 

 Athyris subtilita (Hall) 

 Productus cora (D'Orbigny) . 

 Group of Older Palaeozoic Lamellibranchs 

 Conularia planicostata (Dn.). A Carboniferous Pteropod 



Cyath iphylluin 



PAt;K 

 35 



37 

 38 

 39 

 41 



44 

 46 



49 

 50 

 5' 

 5' 



52 



^2 



53 

 54 



55 



55 

 55 

 56 

 56 



57 

 58 

 59 



59 

 60 



60 

 61 

 62 

 62 



63 



63 



03 

 64 



64 



<>5 



65 

 66 



66 



66 



66 



67 

 67 



68 



69 



70 



