No. 2.] COMPARATIVE CYTOLOGICAL STUDIES. 501 
Form. 
A Single 
More than One Nu¬ 
Nucleolus and 
N UCLEOLUS. 
cleolus, All Alike. 
Paranucleolus. 
Coelenterata . 
f Esperella 
* (H. V. Wilson) 
J Spongilla 
1 Tedamione 
* (Fiedler) 
* 1 
[_ Hircinia 
’ Hydrozoa 
* (Weismann) 
# \ (H.V. Wilson) 
Aequorea 
* (Hacker) 
Hydractinia 
Podocoryne 
# | (Bunting) 
- Geryonia 
* (Fol) 
Tubularia 
Eucope 
Aeginopsis 
* (Doflein) 
* (0. Hertwig) 
* (O. Hertwig) 
k Hydra 
* (Brauer) 
( Nausithoe 
*1 
\ Pelagia 
* l (O. Hertwig) 
J Physophora 
\ Rodalia 
*J 
Ctenophora 
* (Chun) 
* (mihi) 
Plathelminthes. 
Bothriocephalus 
Distomum 
* (Schauinsland) 
* (Schauinsland) 
Polycladidea 
* (Lang) 
Tricladidea 
Rhabdocoele 
* (Repiachoff) 
* (Jijima) 
Prorhynchus 
Bothrioplana 
# j- (Vejdovsky) 
Haplodiscus 
* (Bohmig) 
Nemertini. 
Carinella 
* (Burger) 
( Cerebratulus 
* (Hubrecht) 
* (Burger, Coe) 
\ Lineus 
* (mihi) 
r Malacobdella 
*< 
v. Kennel) 
Drepanophorus 
* (Burger) 
Tetrastemma 
*' 
Amphiporus 
* 
4 Stichostemma 
* 
► (mihi) 
Zygonemertes 
* 
Proneurotes 
l 
Prosadenoporus 
* (Burger) 
„ Pelagonemertes 
t 
* (Hubrecht) 
