230 



Fig. 147. 



IJtholhamnioii polyiitorphiim. Vertical seclion 

 ol' cniplicil s|iiir:iugi;i1 conceplacle. sliowing two 

 imu-ilVriius canals and the coxerinj^ tissue. 

 Ahiiut :i5(i : 1. 



ceptacle. The newly evacuated conceptacles are 

 sometimes covered by a peculiar, rather thick 

 tissue, which is sharply marked otr from the roof 

 (fig. 146 E, 147, Plate III fig. 6). Us cells are fre- 

 (juently broader than Ihose of the roof, (fig. 147). 

 hi a living state this covering tissue appears as a 

 white dot. It has been mentioned by Foslie (Re- 

 marks, p. 78). A similar tissue also occurs overthe 

 sexual conceptacles. Its signification is unknown. 



Antheridial conceptacles I have not seen; 

 they have been mentioned by Heydrich (1900, p. 

 68, Taf. II fig. 1-3) and Foslie (1905). According 

 to the first named author, the spermatia are 

 produced from branched filaments given off 

 from the inner side of the conceptacle, as it 

 seems, in a similar manner as in L. Lenormandi. 

 Thuhet slates (Et. phyc, 1878, p. 91) that the spermatia resemble those of Jania rubens. 



The cystocarpic conceptacles are, according to Foslie, at first convex, but they 

 are not always so, for fairly young, totally immersed conceptacles may be found 

 (fig. 148). As to the development of the cystocarp more detailed statements are given 

 by Heydrich (1. c. p. 70) which are in several respects in discordance with those of 

 SoLMs for other Corallinacece. They very much need a critical trial, but as I have 

 had only dried specimens 

 at my disposal I can only 

 throw little light upon the 

 matter. Before fertilization 

 the concave bottom of the 

 conceptacle is covered with 

 numerous procarps which 

 are two-celled, as shown by 

 Heydrich (fig. 148, Plate III 

 fig. 5). These filaments are 

 intensely coloured byhsem- 

 atoxyline. The lowest cell 

 is probably an auxiliary 

 cell, as maintained by 

 Heydrich, and this is also 

 in accordance with the 

 statements of Minder for 

 Choreonema (Fruchtentw., 

 p 12). This cell may be 

 rather long (fig. 148 C). The 



D 



Fig. 148. 



Lil hdtliaiuniiin poUiiiiurpIiuin. A, vertical section of female conceptacle with 

 carpogonia. B, similar, with a rattier long neck. C, procarps. D, vertical 

 section of the bottom of a female conceptacle, showing fusions between the 

 cells. A, B 200; 1. C, I) 350 : 1. 



