PLATE XXL 
Figs. 1 , la. — Cryptolaria diffusa (p. 42). 
Fig. 1. — Portion of a colony ; natural size. 
Fig. la.— Portion of same, with gonangia ; magnified 10 diameters. 
Figs. 2, 2a, 2 6. — Perisipkonia pectinata (p. 45). ■ 
* 
Fig. 2. — A colony ; natural size. 
Fig. 2a. — Distal end of a pinna, showing the extremities of the hydrothecse projecting 
from between the peripheral tubes which carry the sarcothecse ; magnified 
25 diameters. 
Fig. 26. — Portion of a pinna after maceration in caustic potash ; the peripheral tubes 
detached from the axial tubes and carrying sarcothecse ; magnified 25 
diameters. 
