PHYSARUM.] 
PnYSARACEyK. 
41 
from Dr. Kex (L:B.M.12) marked " P. Pctrrsii var. Farhwii, con- 
globate form," the sporangia are in clusters of from 6 to 14 together, 
as in the compound forms of P. imlymorplmm. 
Hah On dead wood.— Poland (Strassb. Herb) ; Africa (K. 74) ; 
Bonin "island (K. 333); Borneo (L:B.M.12) ; Ohio (L:B.M.]2) : 
Iowa (B.M. 1012, 1015); Georgia (B.M. 853u) ; conglobate form, 
Philadelphia (L:B.M.12). 
3. P. puleliripes Peck, in Bull. Buff. Soc. K Hist., i., p. 64 
(1873). Plasmodium? Total height 1 to 2 mm. Sporangia 
globose, stipitate, yellow-orange, orange-red to dai-k brown, 
sometimes grey from the absence of lime, about 0-5 mm. diam. ; 
sporangium -wall membranous, with deposits of lime usually 
abundant, sometimes scanty. Stalk vermilion-red or red-brown, 
0-5 to 1-5 mm. long, 0-1 mm. thick, somewhat narrowed upwards, 
densely charged with red or brown lime-gi-anules, brittle. 
Columella conical. CapiHitium with red or brown lime-knots, 
in other respects as in P. glohidiferum. Spores violet-brown, 
almost smooth, 6 to 8 /x diam. — Mass., Mon., p. 315. Didymium 
erythrinuvi Berk., in Grev., ii. (1873), p. 52 ; Mass., Mon., p. 249. 
Didymium Ravenelii Berk. & Curt., in Grev., ii. (1873), p. 53 ; 
Physarum Ravenelii Mass., Mon., p. 281. 
Plate VII., A. — a. sporangia, x 20 ; b. capillitium and spores, x 280 ; 
G. spore, X 600 (United States). 
A frequent species in the United States, differing from P. globuli- 
ferum chiefly in the colour of the lime ; and this character appears to 
be constant. Under P. pulchripes are included Didijmium erythrinum 
Berk, and D. Ravenelii Berk. & Curt., which Kostafinski in the 
Appendix to his Mon., p. 8, has placed under Physarum psittacinuin, 
a species without columella and without lime-granules in the stalk. 
Examination of the types in the Kew collection shows that the 
sporangia of D. erythrinum (K. 1265) are immature, but those of D. 
Ravenelii (K. 1513 and B.M. 569) possess a well-developed columella, 
and the stalks in both types are densely charged with lime-granules. 
The type of P. Petersii Berk. & Curt, in Grev., ii., p. 66 (1873) ; Rost., 
Mon., App., p. 6 (Kr]254), belongs also to P. jJulchrij^es. So much 
confusion has been caused by Berkeley and Curtis in giving different 
names to different gathei'ings of this species, and by Rostafiiiski in 
placing P. globnliferum as a variety of P. Petersii, that Peck's name is 
adopted as being free from ambiguity. 
Ifab. On dead wood. —Massachusetts (L:B.M.13) ; Ohio (L: 
B.M. 13) ; N. Carolina (B. M. 569, 852a). 
4. P. murmuiii Lister sp. nov. Plasmodium 1 Sporangia globose, 
about 0-5 mm. diam., stalked or sessile and forming plasmo- 
diocarps, pinkish or yellowish brown, rugose ; sporangium-wall 
membranous, with innate clusters of brown lime-granules. Stalk 
erect, 0 5 mm. long or shorter, 0-1 mm. thick, of equal breadth 
throughout ; pale brown, furrowed, containing dense deposits of 
white lime-granules. Columella present in the stalked forms, 
conical. Capillitium forming either a dense network of obtusely 
branching hyaline threads, persistent after the dispersal of the 
