160 ENDOSPOREAE [ENERTHENEMA 



Hob. On dead wood.— South West Africa (B.M. 1635) ; Ceylon 

 (Peradeniya Herb.); Java (B.M. 2643); Japan (B.M. 2644); Phila- 

 delphia (B.M. 900) ; South Carolina (B.M. 915) ; Nicaragua (K. 718) ; 

 Cuba (K. 1603) ; Antigua (B.M. 1673) ; Brazil (B.M. 2645). 



10. C. irregularis Rex in Proc. Acad. Nat. Sci. Phil., 1891, 

 393. Plasmodium ? Sporangia crowded, stalked, cylin- 

 drical, 2 to 5 mm. high, blackish-brown. Stalk black, slender, 

 1 to 3 mm. high. Columella straight or flexuose, reaching 

 nearly to the apex of the sporangium. Capillitium a close or 

 lax network of arcuate purple-brown threads, becoming 

 more slender towards the surface of the sporangium, and there 

 forming an irregular net, or ending in numerous colourless 

 free branchlets. Spores brownish-purple, often paler on one 

 side, closely spinulose, 8 to 10 p diam. — Macbr. N. Am. Slime- 

 Moulds, 126. Stemonitis crypta Schwein. in Trans. Amer. Phil. 

 Soc, iv. 260 (1832) ? Comatricha crypta Macbr. in Bull. 

 Nat. Hist. Iowa, ii. 139 (1893). C. longa var. irregularis Lister 

 Mycetozoa, 120 (1894). 



PL 122. — f. sporangia (Philadelphia) ; g. capillitium ; h. spore of usual type ; 

 i. spore showing a faint reticulation. 



This species is closely allied to C. longa with which it is connected 

 by intermediate forms with more simple and rigid capillitium, and 

 with spores either spinose or faintly reticulated. It has been suggested 

 that Stemonitis crypta Schwein. was the present species, but the type 

 specimen is utterly lost (teste Rex), and the description is too vague 

 to be instructive. 



Hob. On dead wood.— Maine, U.S.A. (B.M. 1608) ; Iowa (B.M. 

 1006) ; Colorado (B.M. 2646). 



Genus 20.— ENERTHENEMA Bowman in Trans. Linn. 

 Soc, xvi. 152 (1830). Sporangia stalked ; columella reaching 

 to the summit of the sporangium ; capillitium springing 

 from beneath the superficially extended apex of the columella. 



1. E. papillatum Rost. Mon., App. p. 28 (1876). Plas- 

 modium watery- white. Total height 1 to 1-5 mm. Sporangia 

 gregarious, globose, stalked, erect, 0-5 to 0-75 mm. diam., black 

 or purple-brown, crowned with the small iridescent salver- 

 shaped rarely papillate apex of the columella ; sporangium- 

 wall evanescent. Stalk cylindrical or conical, black. Columella 

 slender, cylindrical from a conical base, traversing the spor- 

 angium and expanding on the surface into a membranous disc 

 0*1 to 0*2 mm. broad. Capillitium threads spreading from the 

 expanded apex of the columella, long, slender, black, sparmgiy 

 branched, straight or flexuose. Spores greyish-brown, spinu- 

 lose, 8 to 10 /x diam. — Macbr. N. Am. Slime-Moulds, 137. Stemo- 

 nitis papillata Pers. in Roemer N. Mag. Bot., 90, 1. 1, f . 4 (1794). 

 S. mammosa Fr. Syst. Myc, hi. 161 (1829). Arcyria atra 

 Schnm. Enum. PI. Saell., ii. 215 (1803). Enerthenema elegans 



