482 ALGE OF MALDIVE AND LACCADIVE ISLANDS. 
25. HaLYMENIA sp. 
Minikoi, Laceadive Islands. A fairly common red-brown alga 
with brilliant orange tips. It occurs sparingly everywhere on 
the reef-flat; prefers the parts of the reef where the tide 
rushes out, not the fissures. 
26. PEYSSONELLIA RUBRA, J. Agh. 
Suvadiva Atoll, Maldive Islands. In fine mud at 45 fathoms. 
Geogr. Distr. Mediterranean, Atlantic, Indian Ocean, Pacific. 
27. CORALLINA sp. 
Minikoi, Laccadive Islands. Beneath the breakers beyond the 
edge of the reef. With Laurencia sp. 
EXPLANATION OF PLATE 13. 
Fig. 1. Ralfsia ceylanica, Harv. Nat. size. 
2 0~—C » Small portion seen in surface view. x 178. 
3. ” ” Transverse section of thallus showing vertical arrange- 
ment of cells, with middle row of large rectangular 
cells and basal rhizoids. x 178. 
4, » ” Single rhizoid. ~x 178. 
5. Liebmannia Laccadivarum, n. sp. Nat. size. 
6. ” » Tyansverse section of thallus, showing hairs, para- 
physes, and plurilocular sporangia. xX 30. 
7 ” », Hair, showing swollen basal cells. x 178. 
8. ” », Plurilocular sporangium. xX 472. 
9. Ectocarpus spongiosus, Dickie. Nat. size. 
0 ” », Vegetative filament, showing spare branching and 
curled ends to branches. xX 83. 
ll. - », Curled end of branch. x 178. 
12 ” » Plurilocular sporangium, drawn from type in Herb. 
Mus. Brit. (Mauritius, Pike). x 472. 
18, ” » Plurilocular sporangium, drawn from Laccadive 
Islands material, showing collar round pedicel 
cell. x 472. 
