THE PERCY SLADEN TRUST EXPEDITION. 95 
Besides, in one of the localities (No. B9), as well as in two others (No. B28 and 
B 29), have been collected three larger pieces of calcareous rubble with young crusts of 
undeterminable Lithothamnia. 
Saya DE MALHA BANKS. 
From a depth of 55 fathoms (No. O 15) was brought up several specimens of 
Lithothamnion australe growing gregariously with Lithothamnion gibbosum. Here also 
occurred numerous fragmentary or dead and undeterminable specimens, some of which 
perhaps are stunted forms of Lithothamnion indicum. Several of these specimens are in 
part covered with Squamariacez. Ina depth of 26 fathoms (No. C 16) was dredged a 
solitary specimen of Archeolithothamnion erythrewm and three specimens of Litho- 
phyllum Okamurai f. ptychoides, together with a calcareous Squamariacea, Halimeda, 
erust-like Foraminifera, &c. In addition, from a depth of 29 fathoms (No. C 19) was 
picked up one specimen perhaps belonging to Lithophyllum Okamurai f. ptychoides, in 
company with a few stunted and undeterminable forms, a ealeareous Squamariacea, and 
some coral-rubble and other rubble with crusts of Lithothamnia, Squamariacea, 
Foraminifera, &c. 
CoETIVY. 
About this island is remarked in the Report (l. c. p. 6):—' Although situated only 
about 130 miles to the south of the Seychelles Islands, the land fauna and flora are 
almost the same as on the islands of the Chagos Archipelago, being scarcely richer... . 
On the other hand, the reefs of Coetivy showed in every group of marine animals a more 
varied fauna than those of the Chagos, while very nearly all the species of the latter 
seemed to be present. The reef on the eastern or seaward face of the island was of a 
rather different character from any we had as yet seen, being covered with Zostera *. 
There was also on the same part a considerable variety of algæ, but the edge and outer 
slope were, as elsewhere, covered by corals and nullipores." 
Also with reference to the calcareous algz in question, Coetivy shows almost the same 
state of things as the Chagos. The following species have been collected here :— 
Lithophyllum onkodes, particularly occurring on the western reef, Lithophyllum 
eraspedium, L. Gardineri, and Goniolithon frutescens, mainly on the eastern reef, but 
Lithophyllum craspedium apparently less abundant than in the Chagos. 
PROVIDENCE. 
A number of small but rather well-developed specimens of Lithothamnion indicum 
have been picked up from a depth of 29-30 fathoms (No. D3 and D 24), and from a 
depth of 50-78 fathoms (No. D4) some stunted specimens of the same species together 
with some undeterminable ones. | 
* [This is a mistake for Cymodocea.—J. STANLEY GARDINER.] 
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