Cribraria 201 



margin deeply toothed and perforated; net well developed, with 

 small, regular meshes, and numerous flattened, expanded or 

 branching nodes; cup and nodes thickly studded with purple 

 plasmodic granules 2-2.5 m diam. Stalk subulate, slender, nearly 

 smooth, 0.6 to 1 mm. high, purplish black. Spores pale violet, 

 nearly smooth, 5-7 n diam. 



Type locality: South Carolina. 



Habitat: On dead wood. 



Distribution: Indiana, Iowa, *Missouri, *New York, *Nova 

 Scotia, Pennsylvania, South Carolina, *South Dakota, Tennessee, 

 Virginia, *Washington. 



Illustration: Lister, Mycetozoa ed. 3. pi. 146, figs. d-f. 



Closely related to C. purpurea and difi^ering mainly in size. 

 The presence of a more regular net will distinguish intermediate 

 forms. 



17. Cribraria violacea Rex, Proc. Acad. Nat. Sc. Phila. 1891: 

 393. 1891. (N. Y. B. G. no. 5583, type material.) 



Plasmodium deep violet-black (Lister). Total height 0.5 to 

 1 mm. Sporangia gregarious or scattered, stalked, erect or nod- 

 ding, globose or ellipsoid, 0.2 to 0.4 mm. diam., dark violet with 

 a metallic sheen ; cup shallow or up to two thirds the height of the 

 sporangium, when it may be slightly constricted near the margin, 

 which is scalloped with few short teeth, bluish violet; net verj' 

 irregular, with slender threads connecting large, flattened, broadly 

 expanded, angular nodes; cup and nodes with purple plasmodic 

 granules 0.5-1 n diam. Stalk slender, subulate, violet-black, two 

 or three times the height of the sporangium. Spores lilac, min- 

 utely warted, 6-8 f^ diam. 



Type locality: Philadelphia, Pennsylvania. 



Habitat: On dead wood and bark. 



Distribution: Antigua, Colorado, Florida, Illinois, Iowa, 

 Kansas, New York, Ohio, Ontario, Pennsylvania, Puerto Rico. 



Illustration: Lister, Mycetozoa ed. 3. pi. 146, figs. g-l. 



This species is not rare and is sometimes found in large de- 

 velopments. It is somewhat of an exception in the order Cri- 

 hrariales, as the spores in mass have a distinct brownish violet 

 shade in many instances. A large series of collections made in 

 Kansas by Mr. Travis E. Brooks, and close to the cotype locality, 

 is remarkable for the variation shown. In some collections are 

 sporangia up to 0.5 mm. diam. on relatively long stalks, and with 



