556 University of California Publications in Botany [Vol. 8 



32. Myriogloia Kuck. 



Fronds cylindrical, more or less profusely branched, flaccid and 

 lubricous, with distinct trichothallic growth; medulla composed of 

 numerous colorless, equally large filaments slightly coalescent, giving 

 rise to numerous, narrow, long descending filaments and to an abun- 

 dance of short, straight or uncinate, cortical, colored filaments and 

 long, exserted, hair-like, assimilating filaments with cells densely con- 

 gested with chromatophores ; reproduction in macroscopic plants by 

 zoosporangia borne among the cortical filaments. 



Kuckuck, MS (fide, Oltmanns, Morph. und Biol, der Algen, 1922, 

 p. 19 et seq.). 



We have already explained the situation in regard to this genus 

 and its position. It is closely related to Myriocladia but lacks the 

 distinct and persistent monosiphon.ous axial filament. Its relation to 

 the southern hemisphere Pacific species of Myriocladia is to be con- 

 sidered, with the strong possibility that, upon careful study, they 

 may be segregated generically. Myriogloia, in restricted sense, prob- 

 ably includes three species: M. Andersonii (Farlow) Kuckuck {Meso- 

 gloia Andersonii Farlow, Report U. S. Fish Comm. 1876, p. 715), M. 

 callitricha (Rosenvinge) S. and G. {Myriocladia callitricha Rosen- 

 vinge, Gronl. Havalger, 1893, p. 855), and M. capensis (J. Ag.) S. 

 and G. {Myriocladia capensis J. G. Agardh, Spec. Alg. vol. I, 1848, 

 p. 54). If the Mesogloia natalensis Kuetzing is to be united with the 

 last, the gametangia (?) depicted in Kuetzing 's figure (Tab. Phyc, 

 vol. 8, pi. 10, fig. II, e) , if they really occur in the plant described and 

 figured, call into question our disposition of this entire family. 



Myriogloia Andersonii (Farlow) Kuck, 



Plate 47, figs. 8-10, plate 48, figs. 12-14, plate 49, fig. 17, and plate 76 

 Frond very gelatinous, solitary or gregarious, cylindrical, 8-30 

 cm. (up to 50 cm. high), 1-3 mm. diam., profusely branched; branches 

 mostlj' alternate, long and filiform, very slightly attenuated at the 

 extremities, when young beset on all sides with relatively long, mono- 

 siphonous, conspicuous filaments with band-shaped chromatophores, 

 disappearing when older ; color dark olive brown ; cortical filaments 

 moniliform, mostly uncinate, 6-9 celled, upper cells enlarged; uni- 

 locular zoosporangia developing at the base of the cortical filaments, 

 uniformly distributed over the frond, pyriform, 36-45/a long, 18-21/^ 

 broad. 



