BOLBOCOLEON 227 
VII. BOLBOCOLEON Pringsheim, Phys. Abhand. Königl. 
Akad. Wiss. 1862: 8. ^. r. 1863. Huber, Ann. Sci. Nat. Bot. 
VII. 16: 308-311. M. 13. f. 8-12. 1892. 
Thallus microscopic, epiphytic, consisting of a more or less 
branched creeping filament of irregularly shaped cells on which 
are borne smaller bulb-shaped cells (representing branchlets), the 
latter produced at the summit into a tube from which grows a long 
flagelliform hair. Chromatophore, in the larger cells, a parietal 
sieve-like layer containing 5-Io pyrenoids ; in the smaller pilifer- 
ous cells, an irregularly toothed plate with two pyrenoids. 
Asexual (?) reproduction by means of biciliate zodspores, pro- 
duced in large numbers in the vegetative cells. 
Type (and only species) P. piliferum Pringsh. Inhabitant of 
salt water. [Etym. 801305, a bulb, and xo4so», sheath. ] 
I. BOLBOCOLEON PILIFERUM Pringsheim, Zc. Farlow, Marine 
Algae, 57. 1881. Hauck; Rabenh. Krypt. Flor. Deutsch. 2: 
465. f. 201. 1885. Reinbold, Schrift. Naturw. Ver. Schles.- 
Holst. 8: 138. 1889. DeToni, Syll Ale 1: 211. 1889. 
Huber, ۶۰ ے‎ Wille; Engler & Prantl, Nat. Pflanzenfam. r?: 
96. f. 60. 1890. 
Vegetative cells 12-16 p thick, gg and 2-3 times as 
long as the diameter, or somewhat conica 
Epiphytic among the cortical cells of Leathesia tuberiformis, 
Chordaria divaricata, etc., in summer. 
NEWFOUNDLAND: Grand Bay, near channel, on Castagnea vir- 
escens, ı August 1901 (M. A. Howe). 
MAINE : Cape Rosier, on Ralfsia Borneti, T 1900 (F. S. 
Collins). 
MASSACHUSETTS : Swampscott, on Ralfsia diu 2 April 1891 
(F. S. Collins); Nahant, on Castagnea virescens, 12 July 4 
(F. S. Collins); “ Woods Holl, Gloucester” (W. G. Farlow). 
RuHopE ISLAND: Newport, on Castagnea virescens, 18 June 
1883 (F. S. Collins). 
CALIFORNIA : San Pedro Bay, on Nemalion Andersonii, Novem- 
ber, 1898 (Miss S. P. Monks). 
There is no apparent reason why this species should not be 
found in Long Island Sound and New York Bay, but careful 
search in these places has been fruitless. 
