188 PERCY SLADEN TRUST EXPEDITION. 
9. Lithophyllum Kaiseri, Heydr. 
Lithothamnion Kaiserii, Heydr. in Ber. Deutsch. bot. Ges. xv. (1897) p. 64. 
Lithophyllum Kaiserii, Heydr. 1. c. p. 412. 
f. typiea. 
Lithophyllum Kaiserii, Heydr. in Ber. Deutsch. bot. Ges. xv. (1897) p. 412. 
f. subplicata, Fosl. 
Vidensk. Selsk. Aarsber. for 1900, p. 14. 
Syn. Lithophyllum madagascarense, Heydr. Nouv. Mélob., in Bull. Mus. Hist. Nat. Par. viii. (1902) 
p. 473. 
As I have already pointed out, it is scarcely possible to draw a line between Lithoph. 
Kaiseri and Lithoph. pallescens, Fosl., the latter occurring in the Gulf of California. 
The same is the case with Lithoph. affine. It proves more and more evident that 
both Z. Kaiseri and L. affine must be sunk under Lithoph. pallescens, while, on 
the other hand, this species is very nearly allied to Lithoph. racemus and Lithoph. 
Okamurai. I do not unite them here, as I must first go over the material, now some- 
what increased, which I have not yet had an opportunity of doing. Also Lithoph. 
madagascarense, Heydr. *, must be referred to the same species. According to the type 
specimen, which by the kindness of Mr. P. Hariot I have had the opportunity of 
examining, it only represents a coarse f. swbhplicata. 
The specimens collected are rather well developed and up to about 8 cm. in diameter ; 
but they are partly burdened with other algze which have attached themselves to them. 
They belong partly to the typical form of the species, partly to f. sie oil In the 
month of November they bore ripe sporangia. 
Locality. The Seychelles Archipelago: Praslin Island, reef (Stanley Gardiner) F. 
Area. Madagascar, Réunion, Mauritius, and Rodriguez; the Red Sea; the Maldive 
and the Laccadive groups; Cocos-Keeling Island; and some places in the Pacific 
Ocean. 
10. Lithophyllum moluccense, Fosl. 
On some Lithoth., in Kgl. Norske Vidensk. Selsk. Skrift. 1897, n. 1, p. 12; Cale. Alg. Funafuti, 
l. c. 1900, n. 1, p.10; New Melob., 7. c. 1900, n.6 (1901), p. 12; ‘Siboga’ Exp. n. Ixi. 
livr. 18, p. 67, pl. 12. figs. 2-13. 
Of this species there have been brought home but two small specimens, rather feebly 
developed, attached to pieces of corals. One of them is most nearly connected with 
f. pygmea, and the other belongs to f. flabelliformis. The alga was furnished with ripe 
sporangia in the month of November. 
Locality. The Seychelles Archipelago: Praslin Island, reef (Stanley Gardiner). 
Area. Mauritius, and several places in the Pacific Ocean. 
* F, Heydrich, ‘“ Quelques nouvelles Mélobésiées du Museum d’Histoire Naturelle de Paris,” Bulletin du 
Museum d'Histoire Naturelle, viii. (1902) p. 473. 
+ Also collected by the German ‘ Valdivia’ Expedition at Mahé (Lithoph. affine) and at Diego Garcia (Lithoph. 
Kaisert), 
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