i68 



MUSCINEM 



stomates belong ; (2) a close tissue containing but little chlorophyll, and 

 with the cell-walls pitted or reticulately thickened, without intercellular 

 spaces but sometimes containing mucilage-receptacles ; and (3) a ventral 



Fig. 153. — A, transverse section through middle portion of thallus of M, poly7norpha (x 30); B, 

 through marginal portion (more highly magnified). /, colourless layer without intercellular spaces 

 o, epiderm of upper side ; chl^ chlorophyllous layer ; sp, stomate ; s, partition-walls between air- 

 chamhers ; w, lower epiderm ; h^ rhizoids . ^, leaf-like lamellae. (After Goebel.) 



Fig. 154. — Portion of young receptacle of M, iolymorpha. .A, vertical section; 0, epiderm; sfi, 

 stomate ; 5", partition-wall separating air-chamber from chlorophyllous cells ; g;, mucilage-cell, i)', 

 C, young stomate ; po, pore. (After Goebel.) 



epidermal layer, from which spring rhizoids and leaf-like lamellae. The 

 mucilage-passages are especially developed in Fegatella (Radd.) and 



