i6 



species closelj connected with /. fragilissimtim. In the sections "121. Soëk. v. Rosenberg (6)" 

 a few sin. ill fragments occur, which seem to belong to the same species. It hére appears 

 ther with numerous fragments of Amphiroa and other calcareous algae, among which 

 Mastophora melobesioides classified below. 



In the same section as fig. 6 />' also the calcareous alga represented in fig. 6 C is to 

 be found. It probably represents a species different from the above mentioned one. The cells 

 are here usually 11 — 20 or sometimes up to 25 u.. long and mostly 7 — 10 u.. broad. It is, 

 however, hardly to be ascertained what group it belongs to. 



According to Martin 1. c. the species, in the sense taken by him, also occurs at Timor, 

 where the fossil sediments "sind stellenweise so vorherrschend aus Kalkalgen gebildet, dass 

 man sie nur als fossile Lithothamnien-Banke bezeichnen kann. Das gilt besonders für das 

 Vorkommen von der kleinen Insel Samauw, gegenüber Kupang". - It is unknown to me 

 which of the forms mentioned above is here represented. 



4. Lithothamnion simulans Fosl. mscr. 



Lithothamnion siamense f. simulans Fosl. Corall in SCHMIDT, Fl. Koh Chang II, p. 19. 

 f. typica. Fig. 71 PI. I, fig. 24 — 25. 



I 1 iSLIE 1. c. 



f. crispescens Fosl. mscr. PI. I, fig. 21 — 23. 



Thallus more or less lamellate and crispate, or plicate-leaf-like. 



Stat. 78. Lumu-Lumu-shoal, Borneo-bank. 34 m. Coral and Coralsand. 



Stat. 81. Pulu Sebangkatan, Borneo-bank. 34 m. Coral bottom and Lithothamnion. 



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

 Sand and coral. 



Stat. 125. Sawan, Siau Island. 27 m. Stone and some Lithothamnion. 



Stat. 213. Saleyer and Surroundings. Reef. 



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



Stat. 258. Tual, Kei Islands. 3 — 12 m. Lithothamnion, sand and coral. 



Stat. 261. Elat, West coast of Great-Kei Island. Reef. 



Stat. 2S2. Between Nusa Besi and the N.E.-point of Timor. 27 — 54 m. Sand, coral and Litho- 

 thamnion. 



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



Stat. 315. East of Sailus Besar, Paternoster Islands. Up to 36 m. Coral and Lithothamnion. 



Stat. 322. 1 ' ,, mile south of Tandjong Lajar, South coast of Bawean Island. 32 m. Coral. 



In 11. Koh Chang 1. c. I described the above plant as a form of Lithothamnion siamense 

 and remarked: "I have been in doubt whether f. simulans ought not perhaps to be considered 

 as a separate species, but as I have seen only a solitary well developed specimen of this form, 

 I do not venture 1 ) to keep it distinct, especially since the material also of f. minuta is scarce 

 and some of the specimens no doubt are somewhat stunted". The material in hand from the 



t «ill appear from the connexion 1. c. p. 30, 1. 19 from below "venture" is to be read instead of the word "hesi: 



