COMPARATIVE CYTOLOGICAL STUDIES. 563 



EXPLANATION OF PLATE XXL 

 Figs. l~ig : Gregariues from Linens gesst'refisis. 



Fig. I. Smallest individual found (horn, immers., oc. 2. Hermann's fluid; 

 Del. haematoxylin, eosin). 



Fig. 2. Outline of the largest individual. Obj. C, oc. 2. 



Fig. 3. Nucleus (corros. sublimate ; Del. haematoxylin, eosin). 



Fig. 4. Portion of a longitudinal section, though an individual in which 

 spores were present (as in 3). 



Fig. 5. The smaller of the two nuclei of Fig. i. 



Fig. 6. The same gregarine drawn in Fig. i, but with obj. C, oc. 2 to show 

 its relative size to the one of Fig. 2. 



Figs. 7-9. Nuclei (alcohol, sublimate ; Ehrlich-Biondi stain, 3X hrs.). 



Fig. 10. Nucleus (Flemming's fluid ; Del. haematoxylin, eosin). 



Fig. II. Idem (Flemming's fluid ; Ehrlich-Biondi stain, 23]^ hrs.). 



Figs. 12-16. Nuclei (Flemming's fluid; Del. haematoxylin, eosin). 



Figs. 17-19. Idem (sublimate with 2% acetic acid; aq. sol. methylen blue, 

 30 min. ; aq. sol. brasilin, 2% hrs.). 



Figs. 20-JJ : Gregarines from Carinclhi annnlata ( fixation with alcohol, sol. 



sublimate). 



Figs. 20 and 21. Outlines of two individuals. Obj. C, oc. 2. 



Figs. 22-25. Nuclei (Del. haematoxylin, 15 min., alum carmine, 6 hrs.). 



Fig. 26. Nucleus (Ehrlich-Biondi stain, 3 hrs.). 



Figs. 27 and 28. Nuclei (Del. haematoxylin, eosin). 



Fig. 29. Nucleus, only the outlines of the nucleoli drawn. 



Figs. 30-35. Nuclei (as in 26). 



Figs. S^49 ■ I^uclei of ganglion cells from the brain of Doto (Fig. j6, of the 

 smallest type of cell ; Figs, jy-42, of medium-sized cells ; Ftgs. 4j-.fgy of 

 the colossal cells). 



Fig. 36 (Hermann's fluid, \]{ hrs. ; Lyons blue, 15 min.). 



Figs. 37 and 38 (Hermann's fluid, \]i hrs.; Ehrl. haematoxylin, \yi hrs., 

 eosin, 7 min.). 



Figs. 39 and 40 (alcohol, sol. sublimate ; Ehrlich-Biondi stain, T,]i hrs.). 



Figs. 41 and 42 (as in 37). 



Fig. 43 (as in 39). 



Fig. 44 (Hermann's fluid, i '» hrs.; safranin, 92 hrs., gentian violet, i^ 

 hrs., orange G., 2 min.). 



Fig. 45 (as in 36). 



Figs. 46 and 47. Two sections of one nucleus (as in 37). 



Fig. 48 (as in 37). 



Fig. 49 (as in 39). 



Fig. 50. Immature germinal vesicle of F.mys (picric acid; Del. haematoxylin). 



