484 W. C. Sturgis — Type- Specimens of Myxomycetes. 



sata, Pr.), agrees with Rostafinski's, and lie includes under it 

 the elongated forms mentioned above. Specimens in my own 

 collection show, in the same group, small, almost globose sporangia 

 and others which are cylindrical and 2-3'^'" long. When these, 

 and others even more elongated, exhibit the same color (which, 

 in the case of C. mqualis, Peck describes as " almost exactly like 

 Stemonitis fusca"), the same type of capillitium and the same almost 

 smooth spores,* and when these characters run, without essential 

 variation, through a large series of forms exhibiting sporangia of 

 very varied degrees of height, it would seem but natural to regard 

 the constant characters as diagnostic and to attach to the one charac- 

 ter which varies, merely a varietal significance. On this basis 

 Comatricha cequalis, Pk. can only be regarded as a variety of C. 

 nigra^ (Pers.) Schrt. [f. Friesiana, (D By.) Rost.Jf 



Peeich^na c^spitosa, Pk. {Physarum ccespitosum, Pk. Licea 

 ccespitosa, Pk.), Rep. XXVI, p.' 75, 1878 ; Rep. XXVIII, p. 85, 1875 ; 

 and Rep. XXXI, p. 57, 1878. As noted many years ago by Rex (Bot. 

 Gaz., vol. xvii., p. 202, 1892), this is a fine specimen of Lind- 

 hladia effusa, (Ehr.) Rost., var. simplex, Rex. It is of peculiar 

 interest, however, from the fact that in the upper j^art of the spor- 

 angia, not onl}^ are the plasmodic granules arranged in a reticulate 

 manner, but the wall itself shows, here and there, largo, rounded 

 perforations, thus emphasizing the peculiar relationship between the 

 two genera Lindhladia and Cribraria. (PI. LXI, fig. 18.) 



Teichia eeniformis, Pk., Rep.XXVI, p. 76, 1873,and Rep. XLVI,. 

 p. 57, 1893. Both Lister and Macbride agree in referring this species 

 to Trichia contorta, Kost. It is the form described by Lister as var. 

 gennina, with few elaters, and those very irregularly cylindrical, 

 short, either simply branched or forked, and marked usually with 

 three indistinct spiral bands. (PI. LXI, fig. 19.) Macbride draws a 

 distinction between the three very similar forms, T. inconspicua^ 

 Rost., T. contorta, Rost., and 7\ lowensis, Macbr., on the basis of 

 differences observable in the elaters. These differences, however. 



* Macbride (1. c, p. 131) describes the spores of C. cequalis, Pk. as "distinctly 

 warted." This feature does not ajipear in my glycerine mountings from the 

 tj'pe-specimen. 



f Since writing the above, Mr. Hugo Bilgram, of Phihidelphia, has called my 

 attention to the striking similaritj^, in external appearance, between Comatricha 

 cequalis, Pk. and Stemonitis pallida. Wing. This is certainly very marked ; 

 nevertheless I think they may be distinguished by the denser capillitium of the 

 Stemonitis, its superficial net and its slightly smaller and redder spores. 



