Buchanan: Morphology of Cephalosporium 173 



greenish tinge. In an atmosphere sufficiently moist some of the 

 erect conidiophores are found to be capped by these long septate 

 spores rather than by the more usual short, non-septate type. 

 Every gradation in shape, size and septation may be observed in a 

 single mount from some cultures. These latter allantoid, sep- 

 tate spores imbedded in mucus answer to the diagnosis of Allan^ 

 tospora. The spores of all types germinate readily. Germ tubes 

 may issue from several of the cells of a septate spore. The 

 spores borne on aerial conidiophores and forming heads of the 

 Cephalosporium type are from 4-1 5/x in length and one half to 

 one third as broad. Those that develop in a moist atmosphere 

 and form heads of the Hyalopus type vary from 5 to and are 

 one fourth to one half as broad as long. When developed on the 

 surface of the medium in the presence of an excess of moisture, 

 they either resemble the preceding or become allantoid or falcate, 

 20-30 X 3-5 



From the foregoing description it seems evident that the genus 

 Hyalopus should be merged with Cephalosporium as suggested by 

 Lindau. It is also possible that Allantospora is but a growth 

 form of Cephalosporium. 



The variety purpurascens described below differs in no marked 

 particular from the type except for the production of a purple 

 pigment. This pigment production is somewhat inconstant, and 

 is usually slow in making its appearance. In some cases the purple 

 coloring matter is diffused into the dextrose agar in such quan- 

 tities as to make it practically opaque and of a rich wine-red 

 color. The pigment permeates the mycelium and is found in some 

 of the spores. 



It is possible that the following species has been observed and 

 described in one of its growth forms, but none of the published 

 diagnoses are sufficiently complete to allow of satisfactory identi- 

 fication. 



It is a pleasure to acknowledge the author's indebtedness to 

 Dr. L. H. Pammel for his many courtesies and valuable assistance. 



Cephalosporium Pammelii sp. nov. 



Hyphis sterilibus decumbentibus vel raris in aere crescentibus, 

 longis, hyalinis, multis ramosis, vacuolatis denique protoplasmate 

 cum oleis globulis repreto, articulatis, 5-15 ^ crassis; chlamydo- 



