92 PROCEEDINGS OF THE AMERICAN ACADEMY. 
Typical specimens of this fine species were collected, some more 
than 12cm. long. The species has a characteristic rusty-brown color 
and is coarser than P. Pavonia. In the median portion the frond 
has usually ten layers of cells, 80 40, in section, and a single layer 
of cortical cells, 14 % 9p. The very large oosporangia vary from 
110-125 wp & 70-84 ps 
4 SarGassum, Ag. 
S. cyrmosum, Ag. Spec. i. 20 (1821); J. Ag. Sp. Sarg. Austr. 
109 (1889). — ALBemarLe Ist.: Tagus Cove and Turtle Pt., March, 
1899, Snodgrass & Heller. Wenman Isu.: Dec. 1898, Snodgrass & 
Heller. Further distrib. warmer Atlantic coasts of Asia and Africa. 
In the determination of this specics I have followed J. Ag. 1. c. 
(1889) and the Albemarle and Wenman Island specimens seem to me 
to belong to S. cymosum as that species is limited by J. Agardh. 
The species has, however, been variously interpreted by different writers. 
S. GALAPAGENSE, Grunow in Piccone (1), 48, t. 1. — CHaTHam Ist. : 
Marcacei, acc. to Piccone, l.c. Endemic. 
S. GALAPAGENSE, var. SETIFOLIA, Grunow in Piesine (1), 48, t. 2, 
f. 1, 2 (1886). — ALBemARLE Ist.: Tagus Cove and Turtle Pt., Feb. 
1899, Snodgrass & Heller. ee Ist.: March, 1884, Marcacc?, 
ace. to Piccone, l.c. Endem 
As is remarked by J. Meira 1. c., 122, this variety is closely related 
to S. piluliferum (Turn.) Ag.,.of California and Japan, but not to S. 
acinaria (Turn.) J. Ag., as suggested by Grunow. 
?S. eraminirotium, J. Ag. Spec. i. 103 (1848). Fucus gramini- 
folius, Turn. Hist. Fuc. Pl. 210 (1819). — Wenman Isx.: Snodgrass 
& Heller. Further distrib, China Sea. 
To this species is referred with much doubt a single specimen of a 
Sargassum with the upper fructiferous portion only. The receptacles 
are racemose, the conceptacles contain antheridia and oogonia, and the 
leaves are long, narrow, serrate, with but few cryptostomata. 
S. LENDIGERUM, var. FOLIOSA, Grunow in Piccone (1), 49. — CHATHAM 
Ist.: March, 1884, Marcacci, acc. to Piccone, 1. c. 
S. LENDIGERUM, var. FURCIFOLIA, Grunow, l.c. 50. — CHaTHam Ist. : 
March, 1884, Marcacci, acc. to Piccone, 1. c. 
Of the var. foliosa, Grunow described two forms, subdelicatula and 
rigidiuscula and of var. furcifolia a forma denticulata. J. Agardh, |. ¢- 
