PLATE XXXVII. 
Figs. 1, la, lb, 1 c. — Synthecium campylocarpum (p. 78). 
Fig. 1. — A colony; natural size. 
Fig. la . — Part of a colony; magnified 15 diameters. 
Fig. lb . — A pair of hydrotheese with a gonangium from what is probably a male colony 
of the same species ; magnified 15 diameters. 
Fig. lc.— Basal portion of a pinna in which the gonangia are replaced by hydrotheca- 
bearing ramuli ; magnified about 8 diameters. 
Figs. 2, 2a. — Synthecium alternans (p. 80). 
Fig. 2. — A colony ; natural size. 
Fig. 2a . — Part of a colony ; magnified 15 diameters. 
