Lejolisii, the spermatia are produced at the end of long sterigmata, as shown by 
Mrs. WEBER-VAN BOSSE, and the same was found in Lithophyllum Corallinæ. In the 
last named species the isolated spermatia found in the conceptacles were seen to 
contain two nuclei (fig. 189), an interesting fact, as spermatia with two nuclei have 
formerly only been observed in spermatia fixed to the trichogyne, but not at an 
earlier term. 
Concerning the development of the cystocarp in the Corallinaceæ, diverging 
statements have been advanced. As I have had no occasion of making thorough 
researches on this question, I must, in referring to the quoted papers of SoLms, 
SCHMITZ u. HAUPTFLEISCH, PILGER and MINDER, content myself with stating some 
few facts noted in some of the species in question. 
The carpogonial filaments are, at least usually, two-celled, being composed of 
a terminal carpogonium anda cell situated under it, separated from it by a more or 
less inclined wall; probably an auxiliary cell (fig. 148 C). A hypogynous cell as that 
described in Choreonema by MINDER (I. c. p. 12) was in no case observed. As shown 
by Borner and THURET (1878) and Sorms (1881) a large disciform cell, from the 
border of which the carpospores are produced, arises after the fertilization in the 
bottom of the female conceptacle. SoLms and Scauirz were of the opinion that in 
Corallina it arose from fusion of all the auxiliary cells. PıLGEr showed that in 
Lithothamnion Philippü the two cell-layers situated below the carpogonial branches 
in fusing together take part in the formation of the disc-cell. On the other hand, 
MINDER, by a careful study of Choreonema Thureti, showed that the disc-cell arises 
in this plant from the fertilized carpogonium, which increases, becomes lobed and 
gradually fuses with all the auxiliary cells, the contents of which is absorbed by 
the disc-cell, which is thus no fusion-cell. The statements of MINDER appear to be 
so well founded that they cannot be doubted and it must be supposed that similar 
processes also take place in other Corallinacee, though with various modifications 
in the different genera, e. g. combined with other cell-fusions. Having in most 
cases had only insufficiently preserved material of female conceptacles, I can only 
stale, that the carpospores are in most of the species examined produced at the 
periphery of the cystocarp, as in Corallina and others, but that in Lithothamnion 
Lenormandi and Lithothamnion polymorphum they arise also from various points of 
the bottom of the conceptacle. In these cases a disc cell could not be observed in 
the dried material and it was impossible to state whether the aberrant position of 
the carpospores is founded on the fact that the disc-cell is more irregularly lobed or 
whether it must be otherwise explained. As to HEypricn’s statement of the devel- 
opment of the carpospores in Lith. polymorphum, reference may be made to the 
mention of this species below. 
