24 



species in question. The upper layers of this irregularly crustlike piece with wart-like or short 

 1 ranch-like ex< i s are formed by a very smal] crust oi Lithothamnion sp. as well as 



Lithophyllum sp., but in the main b) a plant not well developed which seems to belong to 

 f. pteridoides of the species in question. 



Ar ca: North Atlantic: The southern part of the Atlantic coast of Europa (f. crassius- 

 ai/a, rare), Mediterranean (f. ramulosa, i. crassiuscula, f. clavulata), Adriatic (the same forms 

 as well as f. solutd)\ Iftdic: The Red Sea (not quite certain), the Maldives (f. crassiuscula^ 

 f. clavulata), and the south coast of Anstralia (f. crassiusculd)\ North Pacific: The Gulf of 

 Siam (f. clavulatd). 



-. Lithothamnion australe Fosl. Fig. 10. 



L. coralloides f. australis Fosl. Norw. Lith. p. 62, ex parte; New or crit. Lith. p. 8, fig. 6 — 7; 

 L. australe Fosl. Rev. Syst. Surv. Melob. p. 13. 



t'. tualensis Fosl. mscr. Fig. 11; PI. II, fig. 10 — 17. 



Thallus irregularly branching, shrub-like, 1 — 2 cm. in diameter; branches short and more 

 or less spreading, often curved and knotty, about 1,5 mm. thick. Conceptacles of sporangia 

 slightlv prominent, 400 — 550 u.. in diameter. 



f. ubiana Fosl. mscr. PI. II, fig. 18 — 24. 



Thallus forming roundish nodules about 2 cm. in diameter, with rather straight and 

 subfastigiate branches 1 — 2 mm. thick, partly rather crowded, partly somewhat spreading. 



f. brachiata Fosl. mscr. PI. II, fig. 25 — 38. 



Thallus irregularly, rather sparingly branched, frequently with spreading and diverging 

 branches 1 — 2 mm. in diameter. Conceptacles of sporangia 400 — 600 ti. in diameter. 



f. minutula Fosl. mscr. PI. II, fig. 39 — 62. 



Thallus more or less branching, roundish or irregular, frequently 0,5 — 1 cm. in diameter; 

 branches partly rather crowded, partly more or less spreading, frequently about 1 mm. thick. 



Stat. 79 . Pulu Kabala-dua, Borneo-bank. 22 m. Coralsand. 



Stat. 86. Dongala, Palos Bay, Celebes. Reef. 



Stat. 91. Muaras-reef, inner side : East coast of Borneo. 



Stat. 93. Pulu Sanguisiapo, Tawi-Tawi Islands, Sulu Archipelago. 12 m. Lithothamnion- 



bottom. Saml and coral. 

 Stat. 99. Off North Ubian. 16 — 23 m. Lithothamnion-bottom. 

 Stat. 106. Off Kapul Island, Sulu Archipelago. 13 m. Coral-bottom. 

 Stat. ioy. Off Pulu Tongkil, Sulu Archipelago. 13 m. Lithothamnion-bottom. 

 Stat. 149. Fau-anchorage, West coast of Gebé Island. 31 m. Coral. 

 Stat. 240. Banda-anchorage. Lithothamnion bank in 18 — 36 m. 

 Stat. 258. Tual-anchorage, Kei Island. 22 m. Lithothamnion, sand and coral. 

 St.it. 277. Kulewatti (Sollot) Bay, Dammer Island. 

 St.it. 282. Betvveen Nusa Besi and the N.E.-point of Timor. 27 — 54 m. Sand, coral and 



I ,ithothamnion. 

 Stat. 299. Buka- or Cyrus Bay, South coast of Rotti Island. 34 m. Mud, coral and Lithothamnion. 

 Stat. 303. Haingsisi, Samau Island. Reef. 

 Stat. 315. Easl of Sailus Besar, Paternoster Islands. Up to 36 m. Sand, coral and mud. 



