PLATE LIU. 



Fid. 



1. SERTULARIA PUMILA, p. 260, nat. size. 



1 a. Portion, magnified. 1 b. The capsule, magnified. 



1 c. The same, in a more advanced stage, with the 

 external mar supium. After Lindstrom. The other 

 figures are by the Author. 



2. SERTULARIA GRACILIS, p. 262, nat. size. 



2 a, 2'. Portions, enlarged. 2b. The capsule. From 



drawings by the Author. 



3. SERTULARIA FILICULA, p. 264, nat. size. From a draw- 



ing by Mr. T. West. 



3 a. Portion, magnified (T. H.). 3b. The capsule. After 



Ellis. 



