THE 



MONTHLY MICROSCOPICAL JOURNAL. 



APEIL 1, 1872. 



I. — On the Development of Vegetahle Organisms within the 

 Thorax of Living Birds* By Dr. James Mueie, F.L.S., 

 F.Gr.S,, &c. ; Lecturer on Comp. Anat. Middlesex Hosp. ; 

 formerly Pathol. Glasg. Eoy. Infirmary ; Assist. Conservator 

 Koy. Coll. of Surg., Eng. ; and late Prosector Zool. Soc, Lond. 



{Read before the Royal Microscopical Society, Jan. 3, 1872.) 



Plate XII. 



The fact of lowly - organized vegetable structures finding a 

 nidus and flourisliing in the bodies of animals and man, is one 

 well known to microscopists, physiologists, and pathologists. When 

 these microscopical parasites, Algae or Fungi, as the case may be, 

 effect a lodgment on the exterior of the body, whether of the 

 lower or higher animals, they not infrequently give rise to pecuhar, 

 tegumentary diseases. Such, for instance, are, — the forms of Favus 



EXPLANATION OF PLATE XII. 



Fig. 1. — Portion of the vegetable organism and its plastic membranous nidus 

 from the pleura of the Great White-crested Cockatoo, CacatUii cristata, 

 Linn. Sketched when fresh and of natural size. 



„ 2. — Magnified view of part of same examined under a low power, and 

 showing filamentous threads (mycelium) and echinulate spores. 



„ 3. — Crucial arrangement of two filaments, at the junction of which a spore is 

 attached. 



„ 4. — Some of the cells and spores of the above highly magnified. 



„ 5. — Sporules and basement membrane from ciyptogamic growth in the Rough- 

 legged Buzzard, Archibutco lajopus, Gm. 



„ 6. — Anatomical sketch of the thorax of the Rough-legged Buzzard, the 

 heart being dragged to the right side to expose the cryptogamic 

 vegetation on the surface of the lung. 



„ 7. — The opened thorax and abdomen of tlie Kittiwake Gull, Eissa tridactyla, 

 Linn. Designed to illustrate the natural position of the fungus 

 patch towards the visceral organs ; the gullet, stomach, liver, and 

 intestines having been removed. 

 The lettering to this and preceding figure is as follows : — CG, cryptogamic 

 growth. U riglit, and /* left, lung, h, heart, ao, aorta and other 

 vessels, t, trachea, k, left kidney, od, oviduct, r, rectum. 



* An abstract of this paper was laid before the Biological Section at the 

 meeting of the British Association in Edinburgh, August, 187L 



VOL. VII. • M 



