102 



COMPAEATIVE TABLE OF 



Name. 



U. durissima, Kulliker. 



U. (liiniheri, Kolliker. 



U. tliomsoiii, Kulliker. 



U. leptocaulist, Kiilliker. 



V. simjjlex, Kiilliker. 



U. huxleyi, Kulliker. 



Stalk. 



Long, cylindrical, fle.vible, 

 with a spindle-shaped 

 enlai'genient at the lower 

 end. 



Quadrangular, with many 

 spindle-shaped enlarge- 

 ment.?. 



Quadrangular, with well- 

 developed lower, but no 

 upper enlargement. 



Very thin. 



Cylindrical, thin, with a 

 moderately thick sar- 

 cosoma. 



With long 

 below. 



enlargement 



U. carpenter i, Kulliker. ' Enlargement at upper end, 

 continuous, with rachis 

 and loni,' enlargement at 

 lower end. 



Axis. 



Nearly cylindrical. 



Quadrangular. 



Quadrangular, with exca- 

 vated surfaces and 

 rounded edges. 



Rachis. 



A flat rhomboid expansion 

 of the stalk. 



Without inferior enlarge- 

 ment — bilateral. 



Indistinctly bilateral. 



Quadrangular, with con- Bilateral, 

 cave surfaces and blunt 

 edges. 



Quadrangidar, with con- 

 cave surfaces and 

 rounded edges. 



Indistinctly quadrangular. 



Quadrangular, with 

 deeply excavated sur- 

 faces and rounded edges. 



Decidedly bilateral. 



Indistinctlv bilateral. 



Indistinctly bilateral. 



