342 
348. Gracilaria crassa Harv. 
In both islands ; in pools on coral sand. 
* Indian Ocean. 
349. Gelidium corneum J. Agardh. 
Great Coco; on coral reefs; also growing on Halimeda Opuntia. 
Almost Cosmopolitan. 
[A specimen of a Gelidium washed up by the tide on Little Coco, 
was too much withered and bleached to be identified ; another was 
collected there on the reefs, but in too early a stage of development to 
be named.] 
350. Caulerpa clavipera J. Agardh. 
Both islands ; on reefs. 
Cosmopolitan in tropical seas. 
351. Caulerpa plumabis J. Agardh. 
Little Coco; in pools on coral reefs. 
* Indian Ocean. 
352. Valonia pastigiata Harv. 
Great Coco ; on coral reefs. 
Indian Ocean and Pacific. 
353. Valonia conpervoides Harv. 
Great Coco; in pools on coral sand. 
* Indian Ocean. 
[A species of Valonia was collected on Little Coco also, but in too 
early a stage of development to be named]. 
354. Halimeda Opuntia Lamour. 
In both islands ; both on sandstone and on coral reefs, rather com¬ 
mon. 
Cosmopolitan in tropical seas. 
355. SiPHONOCLADUS ? PILfPOBMIS De Toni. 
Washed ashore on the coast of Little Coco after stormy weather 
that prevailed for three days during our visit. 
356. Vaucheria sp. 
Little Coco ; on sandstone reefs. Hone of the specimens obtained 
were in fruit. 
Andamans and Nicobars, the same species apparently was found by 
the writer to be plentiful in South Andaman and in Car Hicobar. 
357. Calothrix Pulvinata J. Agardh. 
Little Coco; in pools above high water mark. 
Cosmopolitan. 
358. -. 
A Nostoeaceous Alga in habit, very like the preceding, was obtained 
152 
