MÉMOIRES. 115 



MOLLUSCA. 



(Weekdieren, Herklots.) 



Cl. TUNICATA. 



(Manteldieren, Herklots,) 



Cynthia claudicans, Savigny. 



Cynthia rustica, Linn. 



Phallusia ampuUoides, Van Ben. — Sur huîtres et homards 



Phallusia intestinalis, Linn. 



Botryllus Schlosseri, Poil. (?) 



Cl. Bryozoa. 

 (Celpolypen, Herklots.) 



Cristatella mucedo, Ciw. 

 Alcyonella fungosa, Poil. 

 Plumatella campanulata, Lamk. 

 Lophopus Bakeri, Van Ben. 

 Lophopus cristallinus, Bail. 

 Halodactylus diaphanus, Lmx. 



Syn. Van Ben. Rech. Bnjoz. Ost. p. 37, pi. V. fiy. 1-2. 



Alcyonium gelatinosum, Mûll. 



Alcyonidium diaphaîium, Lmx. 



Westendorp, Rech. Polyp. flex. de la Belg. p. 45. 



Uva diaphaîium, Huds. 



Alcyonidium gelatinosum, Johnst. 



Fucus gelatinosus, Huds. 

 — Sur la plage d'Ostende, très commun. 

 Halodactylus hirsutus, Fleming. 



