PLATE XXXIV. 
Figs. 1, la, lb. — Desmoscyphus pectinatus (p. 71). 
Fig. 1. — A colony ; natural size. 
Fig. la . — Part of a colony; magnified 15 diameters. 
Fig. lb . — Outline of part of a pinna, viewed in profile, showing the hydrothecse all 
brought to one side of the internodes ; magnified 1 5 diameters. 
Figs. 2, 2a, 2b, 2c. — Desmoscyphus gracilis (p. 71). 
A colony ; natural size. 
Part of a colony; magnified 15 diameters. Towards the basal end of the stem 
the proximal part of a pinna (a) is seen with the spine-like termination from 
which the more distal part had become detached. 
•A pair of connate hydrothecse ; magnified about 30 diameters. Front view. 
The same, dorsal view. 
Figs. 3, 3 a. — Desmoscyphus obliquus (p. 72). 
Fig. 3. — A colony ; natural size. 
Fig. 3 a . — Part of the same; magnified 15 diameters. 
Fig. 2.— 
Fig. 2a . — 
Fig. 2b. 
Fig. 2c. — 
