LICEACEJS. 
149 
Dictydium umhilieatum, with two to four minute purple granules on 
the spore wall ; the stalks are stout and rugged, but of the same 
purple-brown colour as in the latter species. The type of Crihraria 
exilis Maobride, from Nicaragua (B. M. 1026), is an almost typical 
form of Dictydium umhilieatum, with a shallow cup connecting the 
slender parallel ribs at the base. 
Hah. On dead wood. — Lyme Regis, Dorset (L:B.M.119) ; Wan- 
stead, Essex (L:B.M.119); Luton, Beds (L:B.M.119) ; Glamis, 
Scotland (B. M. 241) ; France (Paris Herb.) ; Germany (B. M. 660, 
663) ; Italy (B. M. 659) ; Ceylon (B. M. 670) ; Borneo (L:B.M.119) ; 
Maine (B. M. 1105) ; Philadelphia (L:B.M. 119) ; Towa (B. M. 821) ; 
S. Carolina (B. M. 666) ; Nicaragua (B. M. 1026). 
SPECIES NOT MET WITH IN THE QUOTED COLLECTIONS. 
2. D. venosum Schrad., Nov. Gen. Plant., p. 14, pi. iii., fig. 6 
(1797). Scarcely a line high; sporangia spherical, cernuous, 
more or less as in D. umhilieatum, yellowish-brown, when the 
spores are shed, colourless ; veined with nine to twelve ribs of 
rather a brighter colour, the final branches of the ribs lateral, 
usually not anastomosing ; stalk slender, flexuose, brownish. 
Hah. On rotten pine wood. 
Possibly a form of D. umhilieatum, with an irregular net. 
Order II. — Liceace^. Sporangia solitary, sessile or stalked; 
sporangium- wall cartilaginous ; capillitium and columella wanting. 
KEY TO THE GENERA OF LICE AG Ej^. 
Sporangia sessile, globose or plasmodiocarps. (25) Licea. 
Fig. 33. — Licea flexvosa Pers. 
a. Group of plasmodiocarps. Twice catural size. 
h. PlasmoJiocarp. Magnified 6 times. 
c. Spores. Magnified 200 times. 
Fig. 33. 
Sporangia stalked, furnished with a lid of thinner substance. 
(26) Okcadella. 
Fig. M.— Orcadclla operculata Wingate. 
a. Group of sporangia. Magnified 8 times. 
b. Sporangium with open lid. Magnified 80 o„ n 
times. ^^ditp^ 
ft 
Fig 84. 
