viii List of Illustrations in the Text. 



PAGE 



Baculites anceps, Lam. 395 



Cardioceras cordatum, Sow 395 



Arietites obtusus, Sow. 396 



^goceras capricornus, Schloth 396 



Davcei, Sow 396 



Grammoceras serpentinus, Schloth 397 



Desmoceras ligatum, d'Orb 397 



Stephanoceras Blagdeni, Sow 398 



• coronatum, d'Orb 398 



Cosmoceras Jason, Rein 399 



Hoplites radiatus, Brug 399 



Scaphites Sugar dianus, d'Orb 399 



Crioceras Emerici, Leveille 400 



Ancyloceras Matheronianum, d'Orb 400 



Diagram to show Viscous Flow of Glacier-Ice 410 



412 



413 



Diagram-map of the Island of Trinidad 422 



Topography of the immediate area of the Pitch Lake of Trinidad 423 



Distribution of Grenville Limestone in the district north of Papineauville . . 446 



Topography of Cote St. Pierre, from the North-east 447 



Section in the VaUey of Calumet River 448 



Bent and dislocated Quartzite in Contorted Schists near Montebello .... 448 



Tetragraptus Bigsbyi, Hall 485 



Bryograptus Callavei 530 



Tetragraptus Hicksii 530 



Bidymograptus affinis 530 



Bryograptus raniosus 530 



Tetragraptus fruticosus 530 



Bidymograptus Murchisoni 530 



Bryograptus retrojlexus 531 



Tetragraptus denticulatus 531 



Bidymograptus fasciculatus 531 



BicJiograptus octonarius 532 



Tetragraptus serra 532 



Bidymograptus arcuatus 532 



Tetragraptus crucifer 533 



Bidymograptus pennatulus 533 



Tetragraptus Headi 533 



Bidymograptus \J -fractus 533 



Bichograptus octohrachiatus 534 



Tetragraptus Bigsbyi 535 



Bidymograptus gibberulus 535 



Tetragraptus quadribrachiatus 536 



Bidymograptus extensus 536 



Tetragraptus approximatus 537 



Bidymograptus nitidus 537 



Typical Arrangement of Canals, etc. in a Lamina of Bozoon Canadense . . . 546 



Cross -section of minute Tubuli ditto ditto . . . 547 



Cross-section of Tubuli more highly magnified ditto . . . 547 



