216 ENDOSPOREAE [TRICHIA 



A single specimen of what appears to be this species has been found 

 at Lyme Regis, agreeing in every respect with the type received from 

 Dr. Rex, except that the stalk is very short, 05 mm. high. 



Hob. On dead wood. — Lyme Regis, Dorset (B.M. slide) ; Adiron- 

 dack Mountains, New York (B.M. 1898). 



10. T. decipiens Macbr. N. Am. Slime-Moulds, 218 

 (1899). Plasmodium rose-coloured or white. Total height 

 1-5 to 3 mm. Sporangia stalked, gregarious, turbinate, 0-6 to 

 0-8 mm. diam., shining olive or yellow- brown ; sporangium- 

 wall yellow, membranous, of two layers. Stalk cylindrical 

 furrowed, 0*5 to 1 mm. long, olive or dark brown, filled to the 

 base with spore-like cells. Capillitium of simple or branched 

 smooth olive-brown elaters, 4-5 to 5-5 fi diam., marked 

 with four or five spiral bands, 0-5 to 1 /* broad, with intervals 

 of 0-5 to 2 /a, gradually tapering into long slender points. Spores 

 yellow-brown, minutely warted, or very closely and often 

 irregularly reticulated on one side, 9 to 12 p diam. — Arcyria 

 decipiens Pers. in Ust. Ann. Bot., xv. 35 (1795). Trichia 

 fallax Pers. Obs. Myc, i. 59 (1796) ; Rost. Mon., p. 243 ; 

 Mass. Mon., 192 ; Lister Mycetozoa, 170. T. virescens Schum. 

 Enum. PI. Saell., ii. 208 (1803). T. cerina Ditm. in Sturm 

 Deutsch. FL, Pilze, 51, t. 25 (1817). T. fulva Purt. Midi. 

 Fl., hi. 290 (1821). T. clavata Wigand in Pringsh. Jahrb. 

 Bot., hi. 28 (1863) ? T. furcata Wigand I.e., 29, t. 1, fig. 1 

 to 11. T. obtusa Wigand I.e., 30? T. nana Zukal in Verb. 

 Zool.-Bot. Gesell. Wien, xxxv. 334, t. xv, f . 8 (1886). T. Stuhl- 

 manni Eichelb. in Verh. Nat. Ver. Hamb., ser. 3, xiv. 32 (1907). 



PI. 158. — a. sporangia ; b. elater ; c. spores (England) ; d. spore, reticulated on 

 one side, spinulose on the other (United States). 



The elaters vary in length in different gatherings ; usually they are 

 long and taper only towards the ends, sometimes they are short and 

 somewhat fusiform ; they are either simple or branched, but apparently 

 never unite to form a Hemitrichia-like network. The warts on the 

 spores may be scattered, and number either eight to ten in a line across 

 the hemisphere, or are more crowded ; in some specimens the spores 

 are minutely reticulated on one side, and spinulose on the other. The 

 white and rose-coloured plasmodia have not been observed growing 

 together on the same piece of wood, but the sporangia produced from 

 both appear to be identical in every respect ; although shades of 

 difference occur in various gatherings, the colour of the plasmodium 

 cannot be inferred from the ripe fruits. The slender stalks filled with 

 spore-like cells distinguish this species from T. Botrytis, its nearest 

 ally. Sporangia sometimes occur that are almost or quite sessile, 

 but they are usually accompanied by others having well formed stalks. 



Hab. On dead wood. Common. — St. Catherines, Somerset (B.M. 

 387) ; Lyme Regis, Dorset (B.M. 1471) ; Boynton, Yorks (B.M. 1124) ; 

 North Wales (B.M. 2917) ; Aberdeen (B.M. 2918) ; Ireland (B.M. 

 2919) ; France (K. 1059) ; Germany (B.M. 749) ; Denmark (B.M. 

 2920); Norway (B.M. 2921); Sweden (B.M. 1729); Switzerland 



