ee ee 
Lithophyllum Phil. emend. 
Subgen. Eulithophyllum Fosl. 
5. L.racemus (Lam.) Fosl. 
List of Lith. p.9; Millepora (Nullipora) racemosa Lain. Hist. an. s. vertebr. 
2, p. 203. 
.?p 
f. erassa (Phil.) Fosl. 
le. Lithothamnion crassum Phil. in Wiegm. Arch. 1837, p. 388. 
Syn. Lithothamnion racemus Aresch. in J. Ag. Spec. Alg. 2, p. 521. 
_ crassum Hauck, Meeresalg. p. 273. 
With some reservation J refer two specimens to the above form of 
this species. They are but 1—2 cm. in diameter, sterile and seem to 
have been dead when collected. Overgrown conceptacles are not to be 
found. The specimens agree however in habit with young ones of the 
said form. So also in the main with reference to structure. 
Between Koh Mesan and Cape Liant on a depth of 9 fathoms. 
Area: North Atlantic: South coast of England (only dead specimens 
known), Bahama; the Mediterranean and the Adriatic; the Red Sea: Indian 
Ocean: Mauritius, Rodriguez. 
Subgen. Lepidomorphum Fosl. 
6. IL. Yendoi Fosl. 
New or crit. calc. Alg. p. 25. 
On the Pacific coast of Japan this rather easily recognisable spe- 
cies sticks to stones as far as hitherto known. In the Gulf of Siam 
it appears to be rather abundant on small Conchs, Cerithia, forming thin 
crusts little by little almost covering the host, and furnished with repro- 
ductive organs in the middle of March. The specimens from this place 
agree in the main both in habit and structure with the typical form of 
the species except that they are smaller. 
Koh Sarlak on Cerithium Morus in shallow water (between tide-marks). 
Area: North Pacific Ocean: Pacific coast of middle Japan. 
Melobesia Lamour. emend. 
7. M. farinosa Lamour. 
Polyp. flex. p.315; Rosan. Mélob. p. 59. 
Also in the Gulf of Siam this widely dispersed species sticks to 
divers other Alge. Well developed specimens have been found on 
Halimeda macroloba and Padina. On Cystoseira latifrons it grows 
together with Bryozoa, the one partly covering the other. The basal 
cells are on a section almost square and about 7 yw in diameter. It is 
provided with sporangia, antheridia and carpospores in the middle of 
February. 
