196 M. M. Metcatr 
page * 
SPITCMC ewe ete tyne Sec gs ee eee oat a oo ne ete ee oe 
Resting. nuclens 225. 24 Uy ob 5 See a!” ong ole ee ee aot CoS 
Division of the body . . . . rere Ae gl tea By 
Time of appearance of the new Sree ses BSE si \ty Sey a ee AD, 
Differences: between the two nuclei: 2 2... ... . sb 242 
Chaomatia Spherwlest if os0r.- oy aa ee an ae GN One . fo eee 
Oniem of the, cetosarc spherules'. . 9: 6 2. 2k ee se ss OG 
Splitting of the chromosomes. . . 247 
Nuclear conditions in other species com cared ih foe of 0. Garena 247 
Enlarged individuals of O. caudata and of other species . . . 5k) De 
General considerations in connection with the structure of Opalina aid the 
PHEMETSNAGl TUILOSIS' SS ope | si Se. es Sr ae le: Me Oe ae nae OOS 
Wetosarc andcventesare:¢) i. gh Netter ied ats wade ® vee 
Excretory organs. . . gl ef vy Seicy Sexes ee Ee re chan oh ens eae 54 
Anterior end of the eiean SS Rees oe ns, Ce ee pe ee er ee 
Absencesotacentrosomesy, 2 < Vaelcuslae +. «fo 2) cane ne eee R04 
The spindle. . ..:. LP Oe ONO ere mt SRS cat i 5) 
The mechanism of sees Mey 256 
The polarity of the nucleus and te anes of fae of the sel oad 
of the body . ) =". So Xe el gene 
Time relations in the fapinon of ihe Ce aiid of aie maior een eA) 
Splitting of the chromosomes .. . Boe nad es, tei tle, or uey Ma te BICOU, 
An alternative explanation of the sae Ct tat, hy) Aa amet as Eee COLL 
The evolution of mitosis . . . : av. Gall d Gee Baine Be ieee eect, 
Nuclear condition and cytoplasmic Sinan sgl cA er PEG, Roe ee eS 
Aualogies of the chromatin spherules Geo lid, fe) ee aes teem Oe 
Pinvlogveny of the nuclei of Cihata . . - = = = 2 1) “einen ieee 
Compound mature or the Ciliata 2%. -. 3 Sn es > ee ae eta t a 
The phenomena in the spring which preceede and accompany copulation . . 276 
Phenomena in O. intestinalis . . . . Sy Dies Gallsutie ie eevee: 4206 
Decrease in the number of eammaeaien sofia! KERR ee oe eed: 
The last division before encystment -...... ....-.. -)') «se 207 
Wxtnision.0L. yeretative curomatin, ... 2% , =. 24.2 es Pate tS 
Hacystment . 2... . % Sb Seals Wenge ately te EEE SHOE ise c BOL 
Formation of the gamete Riki th. gpl Pores MARE LOLA EAs: (oh DOF 
Copulation. . . oh V otaie wil ON, ZOO. 
Chromatin Eemles in the ais ond ae ie, causes. 294 
Nucleoli in the gametes and zygotes . . . URLs. sme 
Can the heterogamous copulation described be Fieoaal 2 Jn Hea 
Encystment following copulation? ............. . . .. . 296 
Phenomena in other species: =... oye es oe eb ey ee ih de | a ees 
Opalgna: caudal, it, fon vey acts We Velie wet. ae ae, SO 
Opalonadamidiali. 2 dace ve oak oe > th) Oy a 208 
Onaling canarum in. 2m od ae (2 OT.) ae, 300 
Maether general considerations,..-.21-...-.-.- « sda - 300 
Veeetative chromidia. 2.2.2. 26- =. . epi «| cal - 300 
Reduction. . . ee eee 8 
Relationships of Gealew Rae seal cat, -.,. ee Ps ls ee 
