572 ANTHOCEROTACE. 
opacis punctate. Pulee hypophylle nulle. Flores monoici vel 
dioici, antici; Q media fronde costave insidentes. IJnvolucrum 
assurgens erectumve, corniforme tubulosum carnosum, ore scarioso 
oblique truncato vel labiato. Perianthium nullum. Calyptra nulla. 
Archegonium oogonio solitario nudo intra frondis (coste) substan- 
tiam nidulante constans. Fructus pedunculatus capsularis (siliqui- 
formis) lineari-cylindricus vel anguste tetragono-prismaticus, raro 
fusiformis, bivalvis vel, sutura altera haud soluta, ad speciem uni- 
valvis, columella (sive dissepimento) axiali filiformi percursus. 
Elateres fibra simplice lata, vel perfecte spirali vel solum undulata 
et flexuosa, vel etiam geniculata et pedetentim rumpente, impleti. 
Spore primum in utriculis tetrasporis incluse, demum liberate, 
tetraédre, sat magne (diametro ;';-3';™™) facie externa convexa 
45 25 
(saltem) muriculate. Antheridia in alveolis—raro biseriatis, pler- 
umque in frondis facie supera inordinatim sparsis—immersa, primum 
strato superficiali operta, serius detecta, solitaria vel sat numerosa.* 
Obs. The chlorophyllose bodies—supposed analogues of the gonidia of 
lichens, and sometimes called by the same name—found in most species 
of Anthocerotes, especially in the cells of the uppermost stratum of the 
frond, Leitgeb thinks he has proved to be colonies of Nostoc. That they 
are aliens, or parasites, seems proved by their abundance in some species 
of Anthoceros, and their almost total absence in others. In Dendroceros I 
have noticed none in the substance of the frond; but the middle stratum 
of the three concentric strata composing the peduncle consists of cells 
containing a dark-green chlorophyl which is probably gonidioid ; and 
underneath the costa of the frond I find naked blackish tubercles, evi- 
dently parasitic, and possibly referable to some species of Nostoc. 
The inordinately large cells found in the leaves of certain Lejewnew and 
Frullanie, either grouped in ocelli or (as in Frullania Tamariset) arranged 
in moniliated lines, probably owe their existence to the presence of a 
parasite. They are at first filled with an opaque grumous matter, usually 
of a green colour, but changing to brownish or reddish, and finally 
exuded, yet clinging awhile to the under surface of the cell, which itself 
remains empty and pellucid. The curious circumstance is that although 
these eye-cells are caused (as I suppose) by the intrusion of an alien, they 
should exist only in certain species, while in others of the same genus 
they are uniformly absent; so that the ocelliferous tendency is developed 
only along certain lines, along with other characters deemed of specitic 
value. Fr. Tamarisci, which has the eye-cells arranged in a single 
moniliform row, simulating a nerve, and the allied Hr. germana, where 
there are no eye-cells at all, afford a striking and easily-accessible illustra- 
tion. 
CONSPECTUS GENERUM, 
48. Denproceros. Frons pinnatifida vel bipinnatifida, costa angusta 
* In Anthocerotis specie monoica, nondum bene determinata, ab amico 
STABLER juxta Levens Westmorlandie lecta, autheridia valde numerosa, 18-29 
in quoque alveolo, invenimus. 
