trichia] trichiaceae 215 



(B.M. 2907) ; Iowa (B.M. slide) ; New York (B.M. slide) ; New Hants 

 (B.M. 2908) : var. alp ina— Sweden (B.M. 2909) ; Switzerland (B.M. 

 2901); Lower Austria (B.M. 3205). 



8. T. lutescens Lister in Journ,. Bot., xxxv. 216 (1897). 

 Plasmodium ? Sporangia sessile, scattered or in small 

 clusters, globose or bolster-shaped, 0*15 to 0-7 mm. diam., 

 shining, bright yellow or olivaceous-yellow ; sporangium- 

 wall membranous, yellow, entirely free from granular deposits, 

 often embossed with the impression of the underlying spores. 

 Capillitium consisting of short or long, simple or branching 

 pale yellow elaters, 0*3 to - 45 p. diam., marked with four 

 to five distinct or often faint spiral bands, either tapering or 

 blunt and bulbous at the tips. Spores bright or olivaceous 

 yellow, closely warted or spinulose, 10 to 12 p diam. — Torrend 

 Fl. Myx., 116. Oligonema furcatum Buckn. in Mass. Mon., 

 173 (1892). Trichia contorta var. lutescens Lister Mycetozoa, 

 169 (1894). 



PI. 161. — c. sporangia (Yorks) ; d. elaters and fragment of sporangium-wall ; 

 e. tip of elater and spores. 



This species is closely allied to T. contorta from which it is distinguished 



by the delicate sporangium-wall being translucent and entirely free 



from granular deposits. An abnormal form was found by Dr. R. E. 



Fries near Upsala (B.M. 2915), having yellowish-brown sporangia 



varying in size from 0'3 to 0"7 mm. diam. ; some elaters are short 



and simple, others branch and anastomose, and show many spherical 



or irregular expansions and blunt spine-like processes. Numerous 



gatherings of T. lutescens have been made by Dr. Torrend, near Lisbon ; 



in one of them the long elaters are combined to form a network ; 



this has been placed by Dr. Torrend under Hemitrichia Karstenii as 



var. lutescens nov. var. (Bull. Soc. Port. Sc. Nat., ii. 61). Bucknall's 



earlier specific name is not here revived as the combination Trichia 



furcata was previously given by Wigand to what appears to be a small 



form of T. decipiens. 



Hob. — On dead wood. — Abbots Leigh, Somerset (B.M. 2911) ; 

 Yorks (B.M. 2912) ; Berlin (B.M. 2913) ; Norway (B.M. 2914) ; Sweden, 

 (B.M. 2915) ; Portugal (B.M. 2916). 



9. T. erecta Rex in Proc. Acad. Nat. Sci. Phil., 1890, 193- 

 Plasmodium ? Total height 1 to 2 mm. Sporangia scattered, 

 stalked or nearly sessile, globose or subturbinate, 0-5 to 0-7 mm. 

 diam., bright yellow, mottled with well-defined dark brown 

 angular patches ; sporangium- wall membranous, pale yellow, 

 densely charged with brown angular matter in the dark patches. 

 Stalk cylindrical, 0*5 to 1 mm. high, 0*2 to 0-3 mm. thick v 

 dark brown, opaque. Capillitium of cylindrical bright yellow 

 elaters, 3-5 to 4 p diam., with short tapering ends ; marked 

 with four bands forming a close irregular spiral, studded with 

 numerous spines. Spores yellow, delicately warted, 11 to 13 u 

 diam.— Mass. Mon., 184 ; Macbr.X. Am. Slime-Moulds, 218. 



PI. 158. — e. sporangia ; /. elater ; g. spore ; (United States). 



o 2 



