it undoubtedly belongs. Why the locality should have been given as Kamtschatka remains a mystery. 



The Anchorite Islands plant of Professor Askenasy, described as H. cuneata Kütz., proves 

 tn be II. incrassata Lam. 



Under the name of II. oöovata, a plant is figured and described in Kützing's Tab. Phyc. 

 vol. 8. p. it tab. 25. fig. I. This is the truc H. cuneata Hering, of which it is an excellent figure. 



The geographical distribution is limited, so far as is at present known, to the tropics. 

 H. gracilis occurs in the Inclian and I'acitic Oceans and sparely in the \. Atlantic. 



o. //. macroloba Decne. 



Halimeda macroloba Decaisne, Arch. Mus. Hist. Nat. Paris. torn. II. 1841. p. 118. Ess. Classif. 



Alg. mém. Corall. 1S4J. p. 91. 



Halimeda macroloba Kützing, Sp. Alg. 1849. p. 504. 



Halimeda macroloba Zanardini, Plant. Mar. Rub. Mem. Lstit. Yeneto. vol. VII. 1S59. p. 287. 



Halimeda macroloba Harvey, Phyc. Austr. ') 1863. Tab. CCLXVU. descript. pro parte. 



Halimeda macroloba J. G. Agard'h, Till Alg. Syst. VIII. p. 81. 



Halimeda macroloba De Toni. Syll. Alg. vol. I. 1S89. p. 520. synon. pro parte. 



Ilab. INDIC. — Nosi-bé, Hildcbrandt'., Flora von Madagascar, n". 54. — Madagascar, Last'. — 

 Mohilla, Comoro Islands, Kirk\ — Lamu Harbour, Zanzibar, Hildebrandt\ n". 1917. — 

 Djedda, Red Sea, Fontanier\, in Herb. Mus. Paris. Schimper\ Unio itin. 871. -- Arabia, 

 Botta\, in Herb. Mus. Paris. - - Red Sea, M c Andrew\ M' Douald'. — Aden, Fergiisonl, 

 444(1). — Dar es Salaam, Hols/'., n°. 1264. — Ceylon, König\ — Termaklee Island, S. 

 Andamans, Kurz\ — S. Andamans, Herb. Dickic'. -- Singapore, Griffith\ — Tidal coral 

 reef, Keeling Atol, Darwin\, n°. 3638. — Philippines, Cumingl, 2233. — Labuan, Borneo, 

 Kjellman\, in Wittr. et Xordst. Alg. exsicc. n". 339. Burbidge'. ■ Macassar, Celebes, 

 U'eber van Bosse\. in Hauck et Richter Phykoth. univ. n". 274. -- South Celebes, U'eber 

 eau L'osse'. 928. — Bima Bay, U'eber van Bossel — Aru Islands, " Ckallenger'' '! — 

 Siboga-Expedition. Sailus-ketjil, Paternoster Islands! — Island Pau! -- Elat, Great Kei Island, 

 reef! — Noimini, S. E. coast of Timor, reef! - - Landu bay, Rotti, reef! — N. E. coast 

 of Timor, 36 — 54 m. ! - - Dammer Island, 27—54 m. ! — Entrance to Bima bay! -- Kan- 

 "eanff Island ! — Sulu Island ! — South Celebes ! — 



PACIFIC. — Lakemba, Fiji, Harvey'. — Friendly Islands, Harvey'., n". 21 pro parte. — 

 Samoa, Powelll — Upolu, Herb. Mus. Ent'. — Queensland, Dietrich ! in Herb. Askenasy. — 

 Albany Island, Muller'. — Cape Flattery, Australia, A/gae Mu/lerianae'. 



Plant varying in length to about 16 cm., not deeply calcihed, branched in one plane. 



Root generally bulbous, rarely cylindrical, sometimes reaching 40 mm. 



Joint immediately above root short, thick, subcylindrical, stalk like; other joints very 

 irregular, discoid, oval, cuneate, and other forms, not ribbed, thick, sessile; margin thick, entire 

 or irregularly lobed. Largest joint about 20 mm. long, 28 mm. broad, 2 — 3 mm. thick. 



Filaments of central strand do not fuse, but communicate with each other at apex of 

 joint, by means of large open pits. 



Peripheral cells 30 — 40 u. across, surface view 75 — 150^ long; only held together by a 

 chalky matrix, thus dropping apart on decalcification. 



1) The figure theve given most closely resembles //. macroloba, but I have seen no specimen of that species rrom Australia. The 

 alga referred to as n°. 562 Alg. Austr. Exsic. was made the type of H. versatilis by Prof. J. (1. AGARDH and is synonomous with H. 

 cuneata Hering. The description includes characters of //. macroloba and of H. cuneata. 



