CALCAREOUS ALG^E FROM MURRAY AND COCOS-KEELING ISLANDS. 295 



In determining this species the writer had access to several specimens 

 from the Heydrich herbarium and from the original locality (El Tor, Red Sea) 

 and collector (Kaiser), as well as to the published descriptions and figures. 

 The crusts are thinner than most of the crusts of this authentic material, but 

 no thinner than some of them. 



Goniolithon myriocarpum (Foslie) Foslie. 



Goniolithon myriocarpum (Fosl.) Fosl., Siboga-Exped. Monog. 6r, p. 45, plate 9, figs. 6, 7, 1904 [as G. 



myriocarpon]. 

 Lithoth amnion myriocarpum Fosl., K. norske Vidensk. Selsk. Skr., 1897, No. r, p. 19, 1897. 



"1,400 feet from shore, line I, southeast reef"; also "1,000 feet from shore, line I, 

 southeast reef." 



Forming closely adherent crusts 200 to 700/* thick on old corals. Hypothallic cells 

 mostly 18 to 26^ by 8 to 13//, for the most part not very obviously stratified. Perithallic 

 cells 5 to 9 /i long, heterocysts sometimes infrequent, 18 to 25/1 long. Conceptacles 300 to 

 400M in diameter. In structure it is rather suggestive of the West Indian G. accretum Foslie 

 and Howe, 1 though the hypothallium is commonly better developed. 



This plant is referred here with some doubt, but it seems to have enough 

 in common with Foslie's description and figures of G. myriocarpum to justify 

 this provisional disposition of it. It would appear to differ, if at all, in the 

 somewhat thicker crusts and smaller conceptacles. All of the conceptacles 

 sectioned have been found essentially empty, so it can hardly be determined 

 whether they are cystocarpic or tetrasporic, though indications that they are 

 not antheridial have been noted. The type of G. myriocarpum came from 

 the Red Sea, but the species has since been reported also from the Celebes, 

 New Guinea, etc. 



Goniolithon frutescens Foslie. 



Goniolithon frutescens Fosl., K. norske Vidensk. Selsk. Skr., 1900, No. I, p. 9, 1900; Siboga-Exped. Monog 

 61, P- S3, plate 10, figs. 7-13, 1904. 



' '400 feet from shore, line I, southeast reef." In typical form. The type of the species 

 was from Funafuti. 



Lithophyllum oncodes (Heydrich) Heydrich. 

 Lithophyllum oncodes (Heyd.) Heyd., Ber. deutsch. bot. Ges., Bd. 15, p. 410, 1897. 

 Lithothamnion onkodes Heyd., Bibl. Bot., Bd. 7, Heft. 41, p. 6, plate 1, figs. 11a and b, 1897. 

 Goniolithon? onkodes Fosl., K. norske Vidensk. Selsk. Skr., 1898, No. 3, p. 8, 1898. 



Porolithon oncodes Fosl., K. norske Vidensk. Selsk. Skr., 1909, No. 2, p. 57, 1909; Lemoine, Ann. Inst. 

 Oceanog., t. 2, fasc. 2, p. 160, 191 1. 



On fragment of coral, "1,400 feet from shore, line I, southeast reef"; with Goniolithon 

 myriocarpum (Foslie) Foslie, on fragments of coral, "400 feet from shore, line I, southeast 

 reef"; also, on old corals, "800 feet from shore, line I, southeast reef." The type of L. 

 oncodes came from the Tami Islands, German New Guinea. 



Lithophyllum moluccense (Foslie) Foslie. 



Lithophyllum moluccense (Fosl.) Fosl., K. norske Vidensk. Selsk. Skr., 1900, No. 6, p. 12, 1901; Siboga- 

 Exped. Monog. 61, p. 67, figs. 25, 26, plate 12, figs. 2-13, 1904. Lemoine, Ann. Inst. Oceanog., 

 t. 2, fasc. 2, p. 135, figs. 65-68, 191 1. 



Lithothamnion moluccense Fosl., K. norske Vidensk. Selsk. Skr., 1897, No. 1, p. 12, 1897. 



Lithothamnion tamiense Heyd., Bibl. Bot., Bd. 7, Heft. 41, p. 1, plate I, figs. 4-7, 1897. 



Lithothamnion pygmaum Heyd., Bibl. Bot., Bd. 7, Heft. 41, p. 3, plate I, figs. 8-10, 1897. 



Lithophyllum pygmceum Heyd., Ber. deutsch. bot. Ges., Bd. 15, p. 412, 1897. 



Goniolithon moluccense Fosl., K. norske Vidensk. Selsk. Skr., 1898, No. 3, p. 8, 1898. 



Goniolithon tamiense Fosl., K. norske Vidensk. Selsk. Skr., 1898, No. 3, p. 8, 1898. 



Goniolithon pygmaum Fosl., K. norske Vidensk. Selsk. Skr., 1898, No. 3, p. 8, 1898. 



"i,6oo feet from shore, line I, southeast reef flat, water about 10 inches deep at lowest 

 tide." 



'Bull. N. Y. Bot. Garden, vol. 4, p. 131, plate 85, figure 2; plate 91, 1906. 



