468 PROCEEDINGS OF THE ACADEMY OF [July,. 



Kern und metachromatische Korper bei Sarkosporidien. Arch, fiir Pro- 



tistenkun.de, Bd. 20, Heft 3, pp. 239-250, Taf. 15. 

 Minchin, E. A., 1903: Protozoa. The Sporozoa (in a Treatise on Zoology, 



edited by E. Ray Lankester). 

 Stiles, Charles Wardell, 1893: On the Presence of Sarcosporidia in Birds. 



(Notes on Parasites 18.) Bulletin 3, Bureau of Animal Industry, United 



States Department of Agriculture. 



Explanation of Plate XXXYI. 



Figs. 1-3, 10-12 are made from camera outlines, drawn on the table with a 2 

 mm. objective and No. 18 eye-piece. The balance are free-hand sketches 

 of the two chromatin bodies. The published figures are copies made by Mr. 

 Haines, artist of the Bureau of Animal Industry, from pencil drawings made 

 by the author. 



Figs. 1-3, 6-12 are from smears stained with hematoxylin and acid fuchsin. 



Figs. 4 and 13, from smears stained with Wright's stain. 



Fig. 1. — Spore. All the elements large except vacuole No. 2. All further from 



the broad end of the spore than is usual. 

 Fig. 2. — Spore. Vacuole No. 1 small; other elements large. This spore is 



typical for the positions occupied by the vacuoles and chromatin bodies. 

 Fig. 3. — Spore. Vacuole No. 1 small; vacuole No. 2 almost obliterated. Kary- 



osome of chromatin body No. 2 sending out strands toward the nuclear mem- 

 brane. 

 Fig. 4. — Chromatin body No. 2. a is taken to be the typical appearance, but 



b and d are very frequent; e is not so often seen. 

 Fig. 5. — Chromatin body No. 2. a, b, c, g and /; are frequent appearances; 



d, e and / are not so often seen. 

 Fig. 6. — Chromatin body No. 2. Compare a with h of fig. 5. In c the element 



stains partly like chromatin and partly like plasma. 

 Fig. 7. — Chromatin body No. 2. a, c and h show the entire nucleus; in b, d, e, f 



and g only the karyosomes can be seen. This condition occurs frequently. 

 Fig. 8. — Chromatin body No. 2. In a, b and c the bodies stain partly like 



chromatin and partly like plasma. In d and e, it is apparently double. 

 Fig. 9. — Chromatin body No. 2. Appearances frequently presented by the 



karyosome. 

 Fig. 10. — Spore. Vacuole No. 1 contains a granule. Chromatin body No. 2 



has here the typical appearance of a vesicular nucleus with one karyosome. 

 Fig. 11. — Spore. The vacuoles are obliterated. 

 Fig. 12. — Spore. Chromatin body No. 2 shows three karyosomes. 

 Fig. 13. — Chromatin body No. 1. The element is here cleft into equal parts. 



