496 Howe : Phycological studies 



larger and of irregular outline, mostly subquadrate, subquadrate- 

 oblong or cyathiform in lateral view, less commonly cornucopiae- 

 form, 65-150 « long (including the usually slender stalk), truncate 

 at apex, in firm contact above with those adjacent for i-| their 

 length, often mterlocked, separable with much difficulty on decal- 

 cification : utricles of the subcortical layer in a single series, buUate, 

 varying from broadly funnelform to subglobose or ellipsoidal, 

 mostly ventricose-obovoid, 110-215/^ in maximum width, always 

 much larger than the peripheral utricles, 4-14 of which commonly 

 arise from the subtruncate apex of each : filaments of the central 

 strand fusing in twos or rarely in threes at the nodes, not coherent, 

 the fusion often incomplete: sporangia unknown, [Plate 25, 

 FIGURES 1 1-20 ; Plate 26.] 



Type locality : Unknown (" Kamtschatka, Voyage de la 

 Venus," according to presumably erroneous label) ; type speci- 

 men in the herbarium of the Museum d'Histoire Naturelle in Paris. 



Distribution : Southern Florida and the West Indies ; 

 Plawaii ; Celebes ; Red Sea ; probably of general distribution in 

 the tropical seas. 



In giving the distribution of the species as above, we are 

 guided only by specimens now in the herbarium of the New 

 York Botanical Garden. Both Halinieda discoidca and H. Tuna 

 occur in Oahu, Hawaiian Islands. We have specimens of Hali- 

 meda Tuna also from the Philippines, Singapore, and from some of 

 the East Indian islands visited by the Siboga Expedition, and it 

 seems probable that both H. Titna and H. discoidca have a wide 

 distribution in the tropical parts of the Indian and Pacific oceans, 

 as well as of the Atlantic. Askenasy's figure 11 (Forschungs- 

 reise S.M.S. Gazelle 4 : pi. 4) was very certainly drawn from a 

 specimen of H. discoidca, apparently from Dirk Hartog Island, 

 Western Australia, though it was identified by Askenasy with the 

 quite different H. macroloba Decaisne. The specimen of H. dis- 

 coidca from the Red Sea, which we have cited above, was collected 

 by Boissier in 1855 {110. 5) and was distributed as H. macroloba. 

 This specimen resembles very closely Zanardini's figure of his 

 Halimeda papyracea, the type * of which also came from the Red 

 Sea. The specimen from the Celebes which we have cited was 



* We have been unable to locate the type specimen of Zanardini's Halijneda papy- 



^racea, which does not appear to exist in his herbarium now preserved in Venice. 



Mrs. Gepp, in her monograph of the genus Halimeda (p. 15), mentions that she had 



been allowed to see this type specimen "through the kindness of Dr. Eeccari." Dr. 



