264 
Agrippina hona 
In view of these difficulties* in placing Agrippina among the 
Actinocephalidae, even as a sub-family, the Agrippininae, it seems best 
to adopt provisionally Strickland’s standpoint, and for the present to 
regard Agrppina as the representative of a new family of grega,rines. 
LITERATURE CITED. 
Brasil, L. (1905). Reclierches sur la reproduction des Gregariues mouocj-.stidees. 
Arch. Zool. exp. (4) viii. 17-38. 
Chatton, E. (1912). Bull. Inst. Pasteur, x. 844-845. 
Leger, L. and Duboscq, 0. (1909). Etude.s sur la .sexualite cliez les Grcgarines. 
Arch. Protistenk. xvii. 19-134. 
Strickland, C. (1912). Agrippina bona, nov. gen., nov. sp., representing a new 
family of Gregarines. Parasitology, v. 97-108. 
DESCRIPTION OF PLATE XVIII. 
Fig. 1. Section through young trophozoite, showing nucleus. Obj. yV x oc. 6. 
Fig. 2. Section through older trophozoite, showing nucleus which contains an achro¬ 
matic spherule. Obj. yV x oc. 6. 
Fig. 3. Full-grown trophozoite. Intranuclear spherule with dark network. Chromatin 
less dense. Obj. yV x oc. 4. 
Fig. 4. Full-grown trophozoite. Spherule with very dark periphery, and lighter interior 
with black granules. Karyosome largely depleted of chromatin. Obj. yV x oc. 4. 
Fig. -5. Full-grown trophozoite. Spherule darker than rest of chromatin. Obj. 7 a 
(Leitz) X oc. 4. 
Fig. 5 a. Nucleus of 5 as seen in next section. Obj. 7 a (Leitz) x oc. 4. 
Fig. 6. Full-growm trophozoite (transverse section) showing a common disposition of the 
chromatin. Obj. yV x oc. 4. 
Fig. 7. Young cyst showdng protomerites. Nucleus with little chromatin. Obj. yV 
X oc. 6. 
Fig. 8. Young cyst (oblique section) showing protomerites. 
Figs. 8 a, 8 h. Nucleus of 8 in succeeding sections. Very little chromatin outside 
sq)herules. Obj. yV x oc. 6. 
Fig. 9. Cyst (oblique section). Chromatin granular, spherules very pale, ectoplasm 
chromatic. Obj. yV x oc. 6. 
Fig. 10. Cyst. Spherules pale, chromatic granules in cytoplasm, ectoplasm chromatic. 
Obj. yV X oc. 6. 
Fig. 11. Cyst with segmentation spindle and old nucleus. Obj. yV x oc. 6. 
Fig. 12. Nucleus and spindle from other individual of cyst shown in Fig. 11. Relation 
of old nucleus to spindle. Obj. yV x oc. 6. 
Fig. 12 a. Spindle of 12 in next section. Obj. yVxoc. 6. 
Fig. 13. Cyst at later stage, showing mitosis, and “resting” nuclei. Obj. yVxoc. 6. 
Fig. 14. Mitosis seen in cyst at later stage than 13. Obj. jV x oc. 6. 
Fig. 15. Cyst showing staining dillerence between individuals. Obj. x oc. 6. 
All the above figures were drawn from sections stained with iron haematoxylin after 
fixation in alcohol-acetic. The outlines were drawn with the help of a camera lucida. 
Except Fig. 15, which represents a section 6 fx thick, the figures were drawn from sections 
of thickness 5 {x. 
