LEPTOCLADIA 177 
and 1-3 mm. wide; teeth extremely variable in form, mostly 
Беін triangular ог triangular-lanceolate from а broad Базе, 
obtuse or more commonly acute and showing distinctly the apical 
cell, the central axis, and an oblique-seriate arrangement of che 
younger cortical cells; thickness of costa in basal and median 
parts 85-130 и, in upper parts 30—65 и, the wing mostly 20-50 ш 
thick; peripheral cells mostly 3-6 и in diameter in surface view; 
antheridia in irregular, often marginal, bands and patches; 
nemathecia small, suborbicular-pulvinate, becoming widely con- 
fluent and continuous at thallus margins; sporangia 25-42 u X | 
10-16 и, the spores irregularly and obliquely paired or sometimes 
partially or irregularly zonate. [PLATE 66; PLATE 57, FIGURES 
9-16.] 
Bay of Sechura, ‘‘dredged in five fathoms,” Coker 157 p.p. 
The resemblance of this plant to the Californian Leptocladia 
Binghamiae J. Ag. (better known as Andersoniella Farlowii 
Schmitz) in both form and structure is so striking that we can 
feel no serious doubts as to its relationships. Yet we are of the 
opinion that it should not be specifically identified with the 
Californian plant. Its segments are commonly 3-8 mm. wide, 
while those of Leptocladia Binghamiae rarely exceed 2 mm.; 
marginal foliolar appendages and innovations are a conspicuous 
feature, while іп L. Binghamiae they appear to be of rare occur- 
rence; the marginal teeth are commonly more acute and show 
the apical cell more distinctly and the younger cortical cells have 
a more regular arrangement than in the Californian plant. 
The Peruvian plant bears a considerable variety of endophytes 
and epiphytes, the more conspicuous endophytes being Hyella 
infestans, Chlorogloea endophytica, and Erythrocladia endophloea, 
all of which are described as new in the present paper. 
The transfer of Leptocladia from the Rhodymeniaceae, where 
it was doubtfully placed by J. Agardh, to the Dumontiaceae and 
the recognition of the later Andersoniella Schmitz as a synonym, 
have been made by Professor W. A. Setchell in various herbaria 
and have recently been formally published by him (loc. cit.). 
The genus Leptocladia is given a place in De-Toni’s "Sylloge 
Algarum” (4: 609. 1900), but appears to have been overlooked 
by Schmitz and Hauptfleisch in Engler & Prantl, “ Die natürlichen 
Pflanzenfamilien," and by Svedelius in the recent Nachtráge to that 
work. 
