Heterotrich ia. 139 



irregular hmuls, incrassated at the nodes ; spores globose, smooth, 

 C — 8 fx diameter. 



Lachnohokis incarnatus, Schroeter, Kr. Fl. ScLles., 110; Sacc, 

 SylL, vii., 1, n. 1478. 



Lachnoholus circinana, Rost., Mon., p. 281. 



Lachnoholus congcsta, B. and Br., Ann. Nat. Hist., n. 1604, 

 t. 9, f. 2 ; Cke., Myx. Brit., p. 74 ; Sacc, Syll., n. 1481. 



On rotten wood, especially pine. Britain (King's Cliffe) ; 

 Germany ; Switzerland ; Lapland. 



(Rostafinski's Synonyms.) 



Arcyria circinans, Fr., Stirp. Femsj., p. 83; Fr., S. M., iii.-, 



p. 177 (182.5). 

 Lachnoholus circinans, Fr., Fl. Scsn., 3j6 (183.5). 

 Lachnoholus Sattteri, Rost., in Fckl. Synib., 2, p. 7G (1873). 



Licea incarnata, A. and S., Consp., 109, t. 10, f. 6 (1805). 

 Lycof/ala incarnahtm, Swrtz, Vet. Ac. Handl., 112 (1815). 

 Pcrichacna incarnata, Fr., S. M., iii., p. 193 (1829). 



Lycoiierdon pinctttm, Batsch., Elench... p. 155, n. 29 (1783). 

 Phijsaruiii congestum, Somf., Fl. Lap., p. 241 (1825). 

 Pcrichacna congrsta, Fr., S. M., iii., p. 192 (1829). 

 Licca congcsta, Wllr., Fl. Cr. Germ., n. 2108 (1833). 



Heterotrichia, Mass. (Nov. Gen.). 



Sporangia densely crowded or scattered, stipitate ; wall single, 

 tliin, upper portion disappearing at maturity, leaving the basal 

 portion as a calyculus ; stem filled with large, thick-walled cells 

 that are sub-angular from mutual pressure; these become smaller 

 upwards, and pass gradually into normal spores; capillitium 

 free from wall of sporangium, its lower branches passing between 

 the cells filling the stem, central portion composed of very thin 

 tubes anastomosing to form a loose, irregular network ; towards 



