DR. S. O. LINDBERG ON ZOOPSIS. 191 
Which possesses very nearly the same structure of stem and of the 
organs of fructification. The most obvious difference is that the 
latter has well-developed vegetative leaves, but these leaves in the 
former, together with the stem, form a continuous Cactus-like 
frond. Tt may be of interest to mention here what Dr. R. Spruce, 
one of the most accomplished observers of any age, has said about 
the matter in a letter dated December 22, 1871 :—“ I have a very 
curious set of Trigonanthi from the Amazon valley ; and I studied 
them well on the spot very many years ago. I have species with 
bifid leaves, others with entire or subentire leaves, and others with 
the leaves combined into a continuous frond (!), when they become 
the Zoopsis of Taylor. But in every species the bracts, whether of 
the 9 or d flower, are normally bifid (dein 3-4-fidz)." With this 
. Very acute observation my own opinion perfectly coincides. And 
therefore hereafter Zoopsis argentea must be called Cephalozia 
argentea. i 
About the limitation of the genus I am not yet quite certain. 
In C. connivens, bicuspidata, curvifolia *, catenulata, Francisci the 
fertile branchlet is almost always very short and arises from the 
axil of an amphigastrium ; 7. e. they are what I will call gastrogy- 
nous; the 9 branchlet never shoots out innovations from the axils 
of the subbracteal leaves 1, if it bears any such, which is very sel- 
dom the case, and the colesula is usually distinctly trigonous. 
This section is formed, I think, by the true Cephalozie. But C. 
Odontoschisma (p. 19, n. 25)=Sphagneecetis, N.-Es. in G. L. N. Syn. Hep. 
fasc. ii. p. 148, n. 10 (1845). Optime! e 
Lepicolea (p. 20, n. 29) =Leperoma, Mitt. in Hook. f. Handb. N.-Zeal. Fl. ii. 
pp. 751 et 754, nn. 18, 1 (1867). Optime! : 
Hymenophyton (p. 25, n. 42) =Symphyogyna, M. N. in Ann. Se. Nat. 2° sér. 
v. p. 66, n. 7 (1836). Optime! Y 
Acrostolia (p. 26, n. 44) — Pseudoneura, Gottsch. in Ann. Sc. Nat. 5° sér. i. p. 
184, n. 24 (1864). Optime! 
* On C. curvifolia I have made the following observation :— — — —— 
Planta autoica, ramulus 4 inter easdem $ sat elongatus, bracteis majoribus 
quam folia, minus concavis et magis irregularibus, antheridium singulum in 
axilla, amphigastriis androcii bene evolutis, integris, colesula extus ssepis- 
sime spinulosa. 
+ Only : C. bicuspidata, catenulata, and curvifolia have I seen the fertile 
branch to be sometimes elongated. E 
t In Mosses and Liverworts the bracts, both male and female, are distinguished 
from the true vegetative leaves by the constant absence of innovations from their 
axils, 
