192 



QRoo 



qOOo 



wall going from the middle of the longitudinal to the border of the basal wall of 

 the mother-cell. Two young stages are shown in fig. 113 A, B. The carpogonium 

 shown in flg. 113 C is a little more developed, though yet unfertilized; the tricho- 

 gyne is short and thick, the carpogonium encloses completely the right side of the 

 hypogynous cell. The carpogonium represented in fig. 113 D has the appearance 

 of being fertilized, the continuity of the trichogyne with the ventral part being 

 interrupted, but the carpogonium has not reached the surface of 

 the frond, and no spermatia adhere to it, nor have any sporogenous 

 filaments been formed. Later stages of the carpogonia I have not 

 observed. 



The auxiliary cells are more numerous than the carpogonia; 

 they occur in particular branches given off at the base of ordinary 

 nemathecial filaments and are shorter than these (fig. IVd E —H). The 

 cells of these filaments have a dense protoplasm and are somewhat 

 swollen, particular!}' the two uppermost cells, while the. third cell 

 from the top (more rarely the fourth) is not swollen. This latter 

 cell is the auxiliary cell, which may be concluded from the fact 

 that it is sometimes found in connection with thin sporogenous 

 filaments running in a horizontal direction between the nemathecial 

 filaments. Over the auxiliary-cell tilament a space containing a 

 hyaline substance and provided with a membrane open above is 

 visible; it resembles an abortive hair (fig. 113). The development 

 of the cystocarps has not been followed, but a cystocarp, not quite 

 ripe it is true, but apparently not far from ripeness, is shown in 

 fig. 113 /. It consists of a few upward directed, slightly branched 

 filaments, the cells of which each produce a carpospore. In the most developed 

 cystocarp I have seen the carposporal cells were 11 — 12 /i in diameter. 



The sporangial nemathecia, of which I have only observed one, much i*esemble 

 those of P. Nordstedtii (Mrs. Weber-van Bosse 1. c. p. 142). The nemathecium had 

 a height of 8S //., the paraphyses were less tapering than those of the sexual nema- 

 thecia, the upper cells being 4// broad; the undermost cells were usually 2—3 times 

 as long as broad. The tetrasporangia, fixed at the base of the nemathecium, are 

 certainly cruciately divided, but the ripe sporangia were disturbed by the preparation. 

 Some were divided by a transverse or slightly oblique wall, but the direction of the 

 following walls could not be stated (fig. 114). The almost ripe sporangia are about 

 50/^ long, 18 w broad. 



As mentioned above, I at first referred the specimens here described to Cruori- 

 ella arinorica Crouan, and 1 maintained this determination also after having examined, 

 through the kindness of Prof. Nordstedt, a type specimen of this species from Crouan 

 in J. Agardh's herbarium at Lund (Nr. 27630), having in one specimen found a still 

 sterile nemathecium with thin upwardly tapering nemathecial filaments as in the 

 sexual nemathecia of the Danish species. The sporangial nemathecia, which at that 



Fig. 114. 

 Cruoriella codaiw. 



A. vertical seclioii 

 of margin of frond. 



B, vertical section 

 of sporangial nema- 

 thecium. H5() : 1 



