INDEX. 



Streptelasma, 400. 



Streptis, 416. 



Streptorhyucug, 416, 4)3. 



Strepula, 410. 



Slricklandia, 416. 



Stromatopora, 39S, 400, 4:2, 42s. 



Stromatopurella, 42S. 



Strophomena, 413, 416, 431, 43.'. 



Stylan^a, 400. 



Stylodictyou, 42S. 



Temnograptus, 397. 

 Tentaciilites, 403. 



Terebratula, 4J2, 416, 4JI, 4jj, 4'io. 

 Tetradiiim, 400. 



Tetragonis, }i)r>. 

 Tetragraptus, 397. 

 Tctraster, 401. 

 Thamnisciis, 41 2. 

 Tliauinograptiis, 397 

 Theca, 419. 

 Thecostegites, 400. 

 Traquaria, 445. 

 Tretneeras, 422. 

 Trichograptus, 397. 

 Trichomanes, 444. 

 Trichomanites, 444. 

 Tricbotaster, 401. 

 Trigduocarpfin, 445. 

 Trinodus, 404. 



Triinicleup, 410. 

 Triplesia, 416. 

 Trochuceras, 421, 422, 423. 

 Turrilepas, 410. 



Ulodcndroii, 441^ 44J, 

 Uncites, 433. 

 Ilniatopteris, 445. 

 Uronettes, 4;6. 



Volkinannia, 445. 



Waldlieiuiia, 416, 433. 

 Whitfielilia, 416. 

 WoiidwarilitoH. 441. 44$. 



Xestoleberis, 457. 

 XijihocariK, 410. 

 Xylobius, 458. 

 Xystrodiii', 463. 



Youngia. 457 



Zaplireiiiis, 429. 

 Zujlleria, 440^ 445. 

 Ztnaspiu, 423. 

 Zygoerijniy, 44^- 

 Zygopteris, 442. 

 Zygosporites, 442. 



407 



