834 MEDICAL MYCOLOGY 



Hyphae composed of cells 4-2.5 x 2-6/a. Sporogenous cells short, ampulli- 

 form or more elongate, usuall}^ terminal or irregularly distributed near the 

 ends of the ultimate branchlets, the lips of the terminal cups spreading. 

 Spores ovoid to ellipsoid, somewhat variable in form and size, usually about 

 4-5 X 2-3/A, hyphae 2-6//, in diameter. Conidial formation in tissues and in cer- 

 tain media, such as hydrocele agar, budded out in short chains, 2-6 cells long, 

 or single on short branches. Similar to other spores, but more ovoid (Fig. 129). 



On hydrocele agar on the sixth day, grayish black, pinpoint colonies com- 

 posed of radiating, septate hyphae with brownish wall. In 3 weeks, colony 

 was 4 mm. in diameter, penetrating 1-2 mm. into the medium, very tenacious, 

 round, brownish black. Medium diffusely colored chocolate brown. 



Apparently, this species has been found only once (Wilson, Hulsey & 

 Weidman, 1933) since the original case, all other reports in the literature 

 being shown after careful study to be based on entirely different organisms. 



GONATOBOTRYTIDEAE 



Conidia usually borne in groups on intercalary swollen cells along the 

 vegetative hyphae. 



THOMIELLA n.g. 



Hyphae repentes, septatae, hyphis conidiophoris erectis vesiculis terminatis; 

 phialidae desunt; conidia catenulata hasifuga leniter minora, non aequalia. 

 GonatorJiodiellae affinis. 



The type species is Aspergillus Dessyi Spegazzini. 



Sterile hyphae creeping, septate ; conidiophores erect, ending in a swollen 

 vesicle ; no phialides present ; conidia in short, more or less radiating chains, 

 with the oldest cells of the chains next the vesicle and decreasing in size 

 toward the distal ends of the chains. 



This very anomalous genus, which may be related to Gonatorhodiella, has 

 a very peculiar formation of spore chains, being the only genus, with which I am 

 familiar, in which the spores vary conspicuously in diameter in the same chain. 

 Evidently, the conidium next the vesicle is the oldest and cuts off, succes- 

 sively, smaller conidia with the smallest and youngest conidia distal to the 

 vesicle. This suggests vaguely some sprouting conditions found in the Ere- 

 mascaceae Imperfectae. On the other hand, some characters suggest relation- 

 ship with Gonatorhodiella, first pointed out to me in a conversation with the 

 late Dr. Thaxter. 



I take great pleasure in dedicating this genus to Dr. Charles Thom, who 

 has devoted a lifetime to the study of the Aspergillaceae and related Fungi 

 Imperfecta It is to be hoped that some of the active Argentine workers will 

 again discover this interesting genus and give us further knowledge of its 

 morphology. 



Thomiella Dessyi (Spegazzini) Dodge, n. comb. 



Aspergillus Dessyi Spegazzini, Physis, Eev. Soc. Argentina Cien. Nat. 8: 

 115-117, 1 text fig., 1925. 



