﻿158 BOTANICAL GAZETTE [march 



surface of which the spores are produced. Spores once to sev- 

 eral times transversely septate, becoming brownish, the sterile 

 basal segment narrowed to form a more or less distinct pedicel- 

 late attachment. 



Cephaliophora tropica, nov. sp, — Sporophores very variable, 

 the heads nearly spherical or more or less elongated, short- 

 stalked or almost sessile. Spores hyaline, becoming fawn- to pale 



w 



chocolate-brown in the mass, translucent, darker at the septa, 

 two- to five-septate (normally three-septate), subcylindrical; the 

 sterile basal cell tapering to a well-marked pedicellate attach- 

 ment. Spores, average about 35Xi6/ti, maximum about 50X 

 19-20/1. Diameter of head, average about 28-3 S/x-. Average 

 length of fertile branch, including head, 60-75/1. 



On mongoose dung, Kingston, Jamaica ; on ass dung, Liberia; on rat 

 dung. Java ; on mouse dung, China. 



Cephaliophora irregularis, nov. sp. — Similar to the last; the 

 spores in the mass more reddish-brown, the habit of growth 

 somewhat different. Spores very variable in form and size, nor- 

 mally once, sometimes twice, septate ; the terminal cell only (as 

 a rule) fertile, usually broadly rounded, often broadened, and 

 not infrequently bilobed. Average spore measurements 25-30 

 Xi8;i, maximum about 36X30/X. 



On mouse dung, Porto Rico. 

 Harvard University. 



EXPLANATION OF PLATES IV AND V. 



The figures were drawn with camera lucida and reduced in reproduction. 

 The approximate magnifications are as follows : fig. 7 X 60 ; figs. 2-3, ii-^J* 

 n-iQ X 390; figs. 4~7,io,i6 X '&6o\ figs, 8-g X 100. 



Figs, i-io. Heterocephahim atirantiactim. 



Fig. I. General habit ; the dark central portion of the head represents 

 the spore mass surrounding the sporophores. 



Fig. 2. Terminal portion of a fertile hypha, its tip enlarged to form the 

 fertile head, which has not yet been overtaken by the corticating hyphae. 



Fig. 3. Fertile head covered with young sporogenous branches, among 

 which the branching tips of the corticating hyphae are beginning to push. 



Fig. 4. Small portion of fertile head showing sporogenous branches and 

 their origin; above, four spores. 



