90 NEMALIONACEAE 
All of the figures are drawn from the type material on the laminae of Lessonia 
nigrescens (Pescadores Islands, region of Ancon, Coker 09150 p.p.). Figures т, 4, and 
5 are enlarged 232 diameters; 2, 3, 7, and тт, 390 diameters; 6, 8-то, 675 diameters. 
The genus Acrochaetium is represented also in Dr. Coker’s 
‚ Peruvian material by the following specimens that we consider 
too meager or immature for determination: 
On decaying thallus of Spatoglossum crispatum, with Streblo- 
nema Сокет, Erythrotrichia polymorpha, etc., Islands of Lobos de 
Afuera, Mar. 27, 1907, Coker 145 p.p. Sterile, the sparingly 
branched filaments 6-8 шіп diameter, from a well-developed, often 
convex-arched, horizontal disc. 
On Chaetomorpha cartilaginea, with Goniotrichum and various 
other epiphytes, San Lorenzo, region of Callao, Feb. 5, 1907, 
Coker 59 p.p. Filaments about 6 и in diameter, with irregular ог 
secund branches; basal disc well developed; sporangia ellipsoid, 
13—15 и X 7-9 и, on a one-celled pedicel or terminal on a short 
branch, undivided or with a transverse septum, perhaps immature. 
Of doubtful position, but possibly belonging with this family: 
LOBOCOLAX gen. nov. 
Thallus parasitic (in Prionitis), vegetating in cortex and 
medulla of the host plant and forming external hemispheric, sub- 
globose, or difform sporiferous cushions, these becoming lobed, 
convolute, or somewhat cerebriform. Foot (intramatrical part) 
penetrating deeply, often lobulate, composed of rather compact 
irregularly interwoven filaments. Medulla consisting of intricate, 
freely anastomosing filaments and occasional larger irregularly 
branched cells, becoming loose and often hollow or filled with a 
tenuous jelly, the outer walls of the medullary cells soft-gelatinous 
and more or less confluent. Cortex consisting at first of long | 
ж 
Only a few of the supposed ргосагрз and cystocarps have been observed. 
- мези seem to conform in all respects to апу of the types of these organs prev iously 
lescrihe. diei 441 даи IX $^ henom- 
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