Seaweeds and Hydroids. 

 Rather less than Natural Size. 



Plate T. 



Green Seaweeds 



Brown Seaweeds 



ii^iiri$mmtsmmii 



Red Seaweeds 



Fig. 9 



rf.. 



Fig. 10 



l-lydroids 



Fig. 2. — Enter omorpha. Fig. 3. — Ulva. Fig. 4. — Cladopltora. 



Fig. 6. — Ectocarpus. Fig. 7. — Ceramium. Fig. 8. — Polysiphonia. 



hydroids. Fig. 10. — Tubularia (a common hydroid). 



Fig. 5. — Latninaria, 

 Fig. 9. — Various 



[Fouling of Sliips 

 [To face p. 8. 



