Howe: PHYCOLOGICAL STUDIES 507 
whose tragic and much lamented death in connection with the 
recent civil disturbances in Mexico occurred on April 29, 1911, a 
few days after he had communicated this and other Lower Cali- 
fornian algz to the writer for determination. 
Fauchea (?) mollis sp. nov. 
Thallus thin (25-354) and membranaceous when dry, soft, 
lubricous, and 165-350u thick when moist, cespitose- -decumbent, 
flabellately subdi-trichotomous, the mats 6-9 cm. in diameter, 
the main segments mostly 5-8 times forked, radiating from a 
center and more or less overlapping in 2—4 layers, the layers here 
and there concrescent and coherent chiefly by deflexed more or 
less specialized originally marginal lobes, axils rounded and the 
segments again approximate or often overlapping; segments 
short-oblong, subquadrate, or occasionally subcuneate, 2-15 mm 
broad, mostly as broad as long, margins entire, the terminal 
segments 2-5 mm. broad, rounded-truncate or bi-trifid-retuse; 
color a dull brownish red or greenish rose; medullary laver of 2 (3) 
series of large nearly empty cells, these mostly oval or elliptical 
and 82-275u X 68-137 in cross section, rounded-hexagonal or 
rounded-oblong when viewed through the cortex, without smaller 
interstitial cells, passing abruptly to the thin subcortical layer 
I—4 series of much smaller cells; cortical layer of mostly 2 
series of minute cells 5—9u high, anticlinal filaments scarcely 
recognizable unless at margins, walls of cortical cells soft, gelat- 
inous, confluent, and hardly visible when soaked out, other parts 
wanting. [PLATE 32; PLATE 33, FIGURE 6.] 
La Paz, Vives 18a (type) and rzf. 
The specimens described above are apparently sterile, but in 
habit and vegetative structure they have so much in common 
with Fauchea that we can feel little doubt as to their generic 
affinities. Fauchea (?) mollis is perhaps most nearly allied to the 
Australian F. nitophylloides,* but the segments of the Baja Cali- 
fornia plant are short-oblong or subquadrate instead of linear, 
the thallus is much thicker (165-250y vs. 65—85u) and much more 
gelatinous, so that it adheres very firmly to paper, the medullary 
cells are much larger (82—275y vs. 27-68, long diameter in cross 
section) the walls of the cortical cells are gelatinous and con- 
fluent when soaked out instead of firm and distinct, and the color 
is a dull brownish red or greenish pink instead of scarlet. 
r the privilege of examining authentic material of this species we are 
indebted to Professor W. G. Farlow and Mr. F. S. Collins 
