98 TuompsoN: THE MORPHOLOGY OF TAENIOMA 
cies Zaentoma macrourum (Schousb.) Thuret.* According to Falk- 
enberg ('01) the Zaenioma macrourum which he found near Naples 
had short shoots ending in two hairs and but 15-20 segments long, 
which is somewhat longer than the specimen from the Bahamas ; 
otherwise the two agree. The Bahamian plant also agrees with the 
Taenioma macrourum, as described originally by Thuret (’76) 
from plants collected by Schousboe in Tangier, as far as can be 
determined by the figures given and by the somewhat condensed 
description. Agardh (’63) alone notes that the flattened shoots are 
often prolonged into three hairs, but he is writing of Zaentoma per- 
* [EDITORIAL NOTE.—Froma study of Thuret’s description and figures of his 7aenz- 
oma macrourunt, based on Schousboe’s plant from Tangier, Morocco (Polysiphonia mac- 
roura Schousb. in herb.), Miss Thompson seems to be justified in identifying at least 
the Bahamian plant his this species. But the question still remains as to the identity 
of this 7: macrourum with the previously . éaentome sone recta of J. Agardh, 
based on material weiietesd on the Pacific coast of Me had not seen 
Agardb’s specimen, but in proposing Seine sas a lilies species, he was in- 
fluenced by the widely separated stations of the two plants, by some sintes t differ- 
ences in size and color, judging from Agardh’s description, and by A rabs “a 
silence as to the apical avis sion of the stichidium and _ the elongation oe its divisions 
into two sae os Agardh, spibdioe does state that the stichidia are often ex- 
current at the apex ‘“‘in fila minuta 3.’’ I have had the opportunity of comparing 
aa shai! specimen of enee perpusilium ae a: J. Ag. 
Ofv. Kongl. Vet.-Akad. Forh. 1847), in the rium at Lund, 
with my specimen from Porto Rico rcecinie June 15, et no. eae and find them 
ese the same except that the terminal hairs are much longer and more luxuriant 
e Porto Rican plant. In the original 7: perpusi/lum the stichidia often terminate 
in Beek short hairs, as described by Agard My Bahamian specimens ( West Caicos, 
December 20, 1907, 0. 5708) differ in savers respects from the Porto Rican, as in- 
dicated above y Miss Thompson. However, they are mostly sterile and they were 
more or less abnormal and peculiar. The color of these specimens when dry is reddish 
purple instead of the sordid green attributed to 7. macrourum by Thuret and the ter- 
minal hairs (always, apparently, in twos) are commonly shorter than in the figures pub- 
lished by Bornet & Thuret and by see though often longer than any figured by 
Miss Thompson, In the Porto Rican specimens, the terminal hairs, which are nearly 
always in threes, though rarely in twos, are fully as long and as well sonal’ as those 
figured by Bornet & Thuret and by Falkenberg for 7: macrourum, though one, perhaps, 
Bornet (Mem. Soc. Nat. Sci. Cherbourg 28: 297. 1892), with eee (Hedwigia 
- 295. 1894), and with De-Toni (Sylloge Algarum 4: 732. 1900) in considering 
aenioma macrourum (Schousb. ) Thuret a syno: f A 
on ion ) ynonym of 7zenioma peruse AS 
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