MYCBTOZOA de Bary. 



Subclass I.— EXOSPORE^. Spores developed outside the 

 sporophores. 



Order I. — Ceeatiomyxace^. Sporophores membranous, 

 branched ; spores white, borne singly on filiform stalks rising 

 from the areolated sporophore. 



Genus 1.— CERATIOMYXA Schroeter, in Engl, and Prantl, 

 Nat. Pflanzenfam., i., 1, p. 16 (1889). Sporophores consisting 

 of membranous processes, either simple branches from a common 

 base, or forked, or forming a network. The periphery is mapped 

 out into polyhedral areolas, from the centre of each of which arises 

 a slender stalk bearing a single ellipsoid colour- 

 less spore. — Ceratium Alb. & Schw., Oonsp. "J 

 Fung., p. 358 (1805) non Schrank (1793). 



Fig. 9. — Ceratiomyxa mucida Schroet. 

 a. Clusters of sporophores, Twice natural size. 

 i. Sporophore. Magnified 40 times. 

 e. Four areolse of mature sporophore : one spore 



still attached to its stalk, and another free. 



Magnified 480 times. Kg. 9. 



1. C. mucida Schroet., I.e. Plasmodium colourless. Sporo- 

 phores white or pinkish-yellow, membranous, either rising from 

 a common hypothallus in a tuft of simple or forked, fasciculate 

 obtuse branches, 1 mm. or more high, -07 mm. thick, or more or 

 less interwoven in broad perforated bands, from which arise 

 irregular and anastomosing lobes ; the membranous wall is divided, 

 chiefly on the upper part of the sporophore, into somewhat 

 hexagonal areolae about 10 ju, broad ; a membranous stalk bearing 

 the spore arises from the centre of each areola. Spores white 

 smooth ovoid, 10 X 6 to 13 x 7 /j,. — Macbride, in Bull. Nat. Hist. 

 Iowa, ii., p. 114. Iscuria mucida Pers., in Romer, N. Mag. Bot., 

 i., p. 121 (1794). Oeratimn hydlmoides Alb. & Schw., Consp. Fung., 

 p. 358. Fr., Syst. Myc, iii., p. 294; Fam. & Wor., in Mem. 

 Acad. Imp. Petersb. (1873), Ser. 7, xx., p. 4; Zopf, Pilzthiere, 

 pp. 64, 174; de Bary, Comp. Morph. Fungi (1887), p. 432; Eng. 

 Fl., v., p. 329 ; Cooke, Brit. Fungi, ii., p. 550. Ceratium pyxi- 

 datwm Alb. & Schw., I.e., p. 359. Ceratium a/rhuscula'B&ok. & Br., 

 in Journ. Linn. Soc, xiv., p. 97. 



