SONNINIA— CLASSIFICATION. 



391 



D. The lobes are decidedly long, and there is little degeneration of lobes or 



lobules in phyletic development. 



A. The lobes are fairly developed. 



Fig. 26.— Outline of L of Sonn. costigera. 



Fig. 27. — Outline of L of Sonn. obtusiformis. 



Sonn. costigera. (Page 428.) 



Sonn. obtusiformis. (Pages 333 and 430.) 



B. The lobes are remarkably well developed, and the septa are much interlocked. 



Fig. 28. — Outline of L of Sonn. renovata. 



Sonn. locuples. (Page 431.) 



a. The outer lobule of L non-partite or feebly bipartite. 



Sonn. renovata. (Page 433.) 

 Sonn. reformata. (Page 434.) 



/3. Outer lobule of L strongly bipartite. 



Fig. 29. — Outline of L of Sonn. dominans. 



Sonn. dominans. (Pages 322 and 435.) 

 Sonn. loculosa. (Page 437.) 



