Order II.— DORSIBRANCHIATA— fcon/inwerf;. 



Phyllodoce, 136 

 Alciopa, 136 

 Spio, 136 



Syllis, 136 



Glycera, 137 



Nephthys, 137 

 Lumbrinera, 137 



Aricia, 137 



Hesione, 137 

 Ophelina, 138 

 Cirrhatulas, 138 

 Palmyra, 138 

 Aplnodita, 138 



Halithea, 139 



Eumolpe, 139 



Polynoe, 139 



Sigaliones, 139 



Acoetes, 139 

 Chaetopterus, 140 



Order III.— ARBRANCHIATiE, 140 



Fam. 1. — Abranchiat.e Setiger/E, 141 



Lumbricus, 141 



Lumbricus proper, 141 

 Enteriones, 141 

 Hypogaeones, 142 

 Trophonise, 142 



Nais, 142 



Clymena, 142 



Fam. 2. — Abranchiate ASExiGERiE, 143 



Hirudo, 143 



Sanguisuga, 143 

 Haemopsis, 144 

 Bdella, 144 

 Nephelis, 144 

 Trochetia, 144 

 Aulastoma, 144 

 Branchiobdella, 145 

 Haemocharis, 145 

 Albiona, 145 

 Branchellion, 145 

 Clespine, 146 

 Phylline, 146 

 Malacobdella, 146 



Gordius, 146 



