THAXTER. — LABOULBENIACE^. 467 



XX. 



CONTRIBUTIONS FROM THE CRYPTOGAMIC LABORATORY OF 



HARVARD UNIVERSITY. 



XXVL — NOTES ON LABOULBENIACE^, WITH 

 DESCRIPTIONS OF NEW SPECIES. 



By Roland Thaxter. 



Presented November 23, 1894. 



Laboulbenia pilosella Robin. 



{Traitedu Miavscope, p. 912, Fig. 285.) 



Through the kindness of Professor Giard the existence of a species 

 bearing this name has been brought to the writer's attention, and an 

 examination of the figure which accompanies its description leaves 

 little doubt of its identity with the form described by the writer on 

 European specimens of the genus Lathrobium under the name Acan- 

 ihomyces brevipes. The plant figured by Robin is said by him to occur 

 on a member of the same genus, and his drawing, though coarse, cor- 

 responds so closely in essentials that the two may be considered 

 synonymous. In selecting the name Acanthomyces, however, the 

 writer was not aware of its previous use by Lebert in a zoological 

 publication, the Acanthomyces aculeata * of this writer having escaped 

 the notice of compilers in recent years. In view of this fact a new 

 designation for the genus of Laboulbeniacete becomes necessary, and 

 the writer would suggest for this purpose the name Rhachomyces, 

 from the resemblance which the main axis of these plants beai's to a 

 vertebral column. The new name will therefore include the six de- 

 scribed species, Rhachomyces longissimus, R, lasiophorus, R. hypogczus, 

 R. Lathrobu, R. furcatus, and R. piloseUus (Robin), to which may be 

 added a seventh form, parasitic, like R. hypogceus, on a blind cave 

 beetle. 



* Zeitschr. f. wissensch. Zoologie, 1858, Vol. IX. p. 447. 



