alwisia] tubulin ace ae 193 



for he states that sessile clusters are not uncommon. The conical 

 form supplied by him and referred to under T. ferruginosa has spores 

 measuring 4 to 6 /x, and represents an intermediate form. Mr. Petch, 

 describes a Ceylon gathering in which the sporangia occur singly or 

 in groups of three to twelve or more ; in some clusters the outer 

 sporangia are reflexed as in Alwisia bombarda (see Petch in Ann. Perad., 

 iv. 357). 



Hab. On dead wood.— Ceylon (B.M. 2802); Java (B.M. 2S03); 

 Japan (B.M. 2016) ; Bonin Islands (K. 821) ; South Carolina (B.M. 

 538); Cuba (B.M. 539); Antigua (B.M. 1681); St. Vincent Island 

 (B.M. 1556) ; Philadelphia (B.M. 2804). 



3. T. Casparyi Macbr. N. Am. Slime-Moulds, 157 (1899). 

 Plasmodium white. Sporangia closely compacted, resembling 

 T. ferruginosa in shape, size and colour ; sporangium-walls 

 connected with a long central columella by numerous straight 

 tubular processes. Spores pale rufous-brown, closely reti- 

 culated over the greater part of the surface, loosely reticulated 

 over the remaining part, 6 to 7 /x diam. — Siphoptychium 

 Casparyi Rost. Mon., App. p. 32 (1876) ; Rex in Bot. Gaz., 

 xv. 319 ; Mass. Mon., 89 ; Lister Mycetozoa, 155. 



PL 150. — /. portion of two sporangia with their walls partially broken away, showing 

 the pseudo-columella and capillitium ; g. portion of pseudo-columella and capilli- 

 tium ; h. spores, two show the side on which the reticulation is lax ; (United States). 



Dr. Rex is of opinion that the columella in this species may be viewed 

 as an aborted sporangium ; he writes, " Aethalia are found in which 

 from one-third to one-half of the component sporangia lack both 

 columellas and connecting threads " (I.e.). 



Hab. On dead wood. — Sweden (B.M. 2805) ; Adirondack Mountains 

 New York (B.M. 1882) ; Iowa (B.M. 1021) ; Washington State (B.M. 

 2806). 



Tabulina guaranitica Mass. Mon., 39, from Guarapi, Argentine 

 Republic, does not belong to the Mycetozoa ; it consists of 

 stalked heads composed of a densely interwoven tissue of brown 

 septate branching hyphae, bearing numerous umber spores, 2 

 to 7 fx. diam., in the upper part ; it belongs to the Hyphomycetes. 



Tubulina spumarioidea Mass. Mon., 42 (K. 801), syn. Licea 

 spumarioidea Cooke & Mass. in Grev., xvi. 74, is also a hypho- 

 mycetous fungus, Sepedonium chrysospermum Link. 



Genus 32. — ALWISIA Berkeley & Broome in Journ. Linn. 

 Soc, xiv. 86 (1873). Sporangia clustered, stalked, ellipsoid ; 

 sporangium-wall falling away in the upper half and exposing 

 a stiff brush of capillitium threads. 



1. A. Bombarda Berk. & Br. I.e., 87. Plasmodium ? 

 Total height 4 mm. Sporangia in clusters of four to eight, 

 stalked, cylindrical-ellipsoid, 1 to 1-5 mm. high, 0-5 mm. broad, 

 rufous-brown, the outer sporangia of a cluster usually re- 

 flexed ; sporangium-wall membranous, evanescent above, 



