274 EXTRACTS AND ABSTRACTS FROM FOREIGN JOURNALS. 



outer rings in common. In two places the air-passages were covered to 

 the thickness of 1 to 1^ lines, with these confluent bodies, which thus 

 constituted a continuous layer of almost cartilaginous consistence. The 

 second instance, in which a similar occurrence was observed, is that of 

 a Falco rufus, which was brought to the Zoological Museum of Berlin, 

 having been shot two years before. In this case, M. Dubois discovered 

 the white, cup-shaped, flattened bodies, quite fresh, in the air -cavities, 

 and also in the abdominal cavity in the neighbourhood of the kidnies, 

 the surface of which presented many of them. 



M. Miiller was at first unable to recognize P any structure in these 

 bodies; but, upon further microscopic examination, some degree of 

 structure or organization was evident in all of them, though not always 

 very readily made out ; in numerous instances, by fortunate sections, 

 very transparent, delicate, branched filaments were observable in amor- 

 phous substance. These filaments were so evidently of vegetable na- 

 ture, that no one who saw them had any doubt on the matter ; they 

 appeared such to MM. Link and Klotzsch. There were, however, 

 other more irregular and much thicker filaments of more doubtful na- 

 ture, which were scattered about, and distinguished by their protube- 

 rant margins ; these filaments were also occasionally seen to be agglom- 

 erated into distinct, rounded masses. 



The vegetable nature of these patches cannot be doubted. The fila- 

 ments of the mould growing upon these patches, bear no resemblance 

 to the filaments within the patch ; they are thicker and evidently 

 jointed, as was observed by M. Deslongchamps, and are all frequently 

 furnished with capitate, sporiferous bulbs. This mould is evidently an 

 Aspergillus. 



Organs of fructification have not been met with in the mushroom-like 

 bodies, which, consequently, in this respect approach the doubtful 

 Sclerotice ; but direct observation of the latter, as Sclerotium semen, 

 complanatum, does not show any close resemblance ; still less similarity 

 is observable in the structure of Dacryomyces stillatus. 



{Trom Mullers Archives."] 



Simon on an Acarus inhabiting Diseased and Healthy Hair-follicles of 

 Man. In reference to the nature of acne, the inquiry may be made, 

 Whether the pustules constituting this eruption, arise from disease of 

 any of the special organs present in the skin, such as the sebaceous and 

 hair-follicles ; or whether they arise from inflammation and suppuration 

 in the fibrous tissue of the skin itself, without preceding morbid affec- 

 tion of any other part of it ? I examined, with a view to determine 

 this question, the contents of acne particles opened in living persons ; 

 and frequently found, as well in the small pustules, which soon burst, 

 and which have been termed acne simplex ; as in the larger ones (formed 

 by more or less reddened indurations of the skin), of acne indurata, be- 

 sides pus, small, elongated, whitish-looking bodies. When brought 

 under the microscope, I always found in these a hair, which was sur- 



