186 PERCY SLADEN TRUST EXPEDITION. 
identical with that form. Here the species occurs rather abundantly, particularly 
associated with Lithoth. gibbosum and numerous fragmentary undeterminable specimens. 
At Cargados Carajos it occurs in a form which partly also approaches f. brachiata, and 
some specimens are almost always consistent with typical f. minutula. 
Localities. Cargados Carajos, No. B 8 (80 fathoms), No. B 14 (80 fathoms); Saya de 
Malha, No. C 15 (55 fathoms) (Stanley Gardiner). 
Area. Several places in the Pacific Ocean, particularly the Malay Archipelago. 
Genus ARCH ZOLITHOTHAMNION (Rothpl.), Fosl. 
5. Archeolithothamnion erythreum (Rothpl.), Fosl. 
Rey. Syst. Surv. Melob., in Kgl. Norske Vidensk. Selsk. Skrift. 1900, n. 5, p. 8. 
Lithothamnion erythreum, Rothpl. in Bot. Centralbl. liv. (1893) p. 5. 
Of this species only a single specimen occurs, feebly developed, attached to a piece of 
coral and coalesced with another calcareous alga which is undeterminable. 
It was picked up from a depth of 26 fathoms, apparently in company with Lithoph. 
Okamura. 
Locality. Saya de Malha, C 16 (Stanley Gardiner). 
Area. The Red Sea; the Gulf of Aden; the Maldives, and many places in the Pacific 
Ocean. 
6. Archeolithothamnion timorense, Fosl. 
‘ Siboga’ Exp. n. Ixi. livr. 18, p. 42, pl. 8. figs. 1-11. 
Of the above species three specimens were brought home, which most nearly resemble 
figs. 4 and 11, 7. ¢. They were dredged at a depth of 31 fathoms and provided with 
sporangia in October. 
Locality. The Seychelles, No. F 2 (Stanley Gardiner). 
Area. Timor and a few other places in the Pacific Ocean. 
Tribe MELOBESIE&, Aresch. (mut. char.). 
Genus GONIOLITHON, Fosl. 
Subgenus EvGonroLirHon, Fosl. 
7. Goniolithon frutescens, Fosl. 
Cale. Alg. Funafuti, in Kgl. Norske Vidensk. Selsk. Skrift. 1900, n. 1, p. 9. © 
The forms of this species occurring on the reefs of the Salomon and Egmont Atolls 
in the Chagos Archipelago and at Coetivy are generally more finely branching than at 
Funafuti, the place where the alga was: first found. In this respect they are most 
closely connected with the forms from the Malay Archipelago figured in ‘ Siboga’ Exp. 
n. lxi. pl. 10, but they are mostly more densely branching. On the other hand, a couple 
of small specimens from a lagoon shoal at Egmont are of about the same coarseness as 
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