EXPLANATION OF PLATE 6. 



Fig. 1. Inocaulis ramulosus (Spencer), p. 38. 



Fig. 2. ThamnograptusC?) multiformis (Spencer), P- 40. 



Fig. 3. Another specimen of same. 



Fig. 4. Thamnograptls bartonensis (Spencer), p. 39. 



Fig. 5 Another specimen of same. 



Fig. 6 Cyclograptus rotadentatus (Spencer), p. 42. 



6a. Branch magnified. 

 Fig. 7. Ptylograptus foliaceus (Spencer), 41. 



la. Branch of same magnified. 

 Fig. 8. Stromatopora concentrioa (Goldfuss), p. 45. Transver.se 

 seciiou, slightly enlarged. 



Sa. The same further enlarged. 

 Fig. 9. Caunopora walkeri (Spencer), p. 46. Horizontal section, 

 enlarged (X2). 



9i. Vertical section, enlarged. 

 Fig. 10. Caunopora mirabilis (Spencer), p. 47. Natural size. 



10'(. View of fragment of surface, natural size 



106. Vertical section, enlarged. 

 Fig. 11. CfENO-STOMA constellatum (Hall), p. 48. Horizontal sec- 

 tion, natural size. 

 Fig. 12. C(enostoma ristigouchense (Spencer), p. 49. Hojizontal 

 section, natural size. 



12a. Vertical section, enlarged. 



Fig. 13. CCENOSTOMA BOTRYOIDEUM (Spcnccr), p. .50. 



13a. Horizontal section, slightly enlarged. 

 136. Vertical section, enlarged. 

 Fig. 14. DiCTYOSTOMA reticulatum (Spencer), p. 51. Vertical sec- 

 tion, enlarged (Xl-5)- 

 14a Vertical section, enlarged (X3). 



