120 SOCIÉTÉ MALACOLOGIQUE DE BELGIQUE 



Cl. ASTEROIDEA. 



Asterias rubens, Limi. 



AsteracanthioTi glacialis, MûU. et Trosch. 



Sol aster papposus, MuU. 



Ophiolepis ciliata, Retzius. 



Ophiotrix fragilis, Mûll. 



CELENTERATA. 



(Maagzakdieren, Herklots.) 



Cl. Ctenophor^. 



(Ribkwallen, Herklots.) 



Cydippe pileus, Miill. 

 Cydippe infundibulum, Mûll. 

 Beroe ovatus, B aster. 

 Collyanyra hexagona, Escîioltz. 



Cl. Hydromedus^. 

 (Polymedusse.) 



Antennularia indivisa, Lamk. 



Syn. West. Rech. Polyp. flex. de la Belg., p. 22. 

 Sertularia antennina, Linn. 

 Nemertesia antennina, Lamx. 

 Antennularia antennina, Flem. 

 — Sur toutes nos côtes, mais rarement entier. 

 Antennularia ramosa, Lamk. 

 Sertularia polyzonias, Linn. 



Syn. S. cotulina, Agass. 

 Sertularia operculata, Linn. 



Syn. West. Rech. Polyp. flex. delà Belg., p. 26. 

 Dynamea operculata. Lamx. 

 Sertularia usneoides, Pall. 



