PLATE III. 



FIG. 



1-3. GEMELLARIA LORICATA, p. 18 : figure 3 is taken 

 from a specimen of G. Willisii received from Dr. 

 Dawson. 



4. , natural size. 



5-8. SCRUPARIA CLAVATA, p. 24; the uniserial and bi- 

 serial forms. Fig. 7 shows the mode of branching. 



9, 10. EUCRATEA CHELATA, p. 14. 



11. } creeping base, with oval expansions, 



from which the shoots originate. 



