COMPARATIVE CYTOLOGICAL STUDIES, WITH 
ESPECIAL REGARD TO THE MORPHOLOGY 
OF THE NUCLEOLUS. 
THOS. H. MONTGOMERY, Jr., Ph.D. 
(Lecturer in Zoology, University of Pennsylvania.) 
From the Laboratory of the Wistar Institute of Anatomy and Biology, 
Philadelphia. 
CONTENTS. 
PAGE 
I. Introduction. 266 
II. Review of the Literature upon Nucleoli. 267 
A. Zoological Literature. 268 
B. Botanical Literature. 375 
C. Synonyms of the Term Nucleolus. 399 
III. Observations. 400 
A . Methods of Study. 400 
B. Protozoa. 402 
1. Gregarine from Lineus gesserensis. 402 
2. Gregarine from Carinella annulata. 406 
C. Metazoa. 410 
a. Egg Cells. 410 
1. Montagua pilata (Verr.). 410 
2. Doto.;. 418 
3. Amphiporus glutinosus (Verr.). 418 
4. Tetrastemma catenulatum (Verr.) Mont. 423 
5. Tetrastemma elegans (Verr.). 431 
6. Zygonemertes virescens (Verr.) Montg. 433 
7. Stichostemma eilhardi (Montg.). 437 
8. Lineus gesserensis (O. F. M.). 446 
9. Siphonophore (Rodalia ?) . 451 
10. Polydora. 455 
11. Piscicola rapax (Verr.). 464 
b. Somatic Cells. 472 
12. Ganglion Cells of Doto. 472 
13. Ganglion Cells of Montagua pilata (Verr.). 473 
14. Ganglion Cells of Piscicola rapax (Verr.). 475 
15. Muscle Cells of Lineus gesserensis (O. F. M.). 475 
16. Muscle Cells of Piscicola rapax (Verr.). 477 
17. Blood Corpuscles of Doto. 478 
18. Giant Cells of Doto. 480 
