6. The Lamprey (Petromyzon marinus, Bloch). The specimen has 



been dissected. 

 Fig. Bloch, Hist. Nat. des Poissons, pi. 77. Yarrell, History of British 



Fishes, vol. ii. fig. at p. 448. 

 Hab. The estuaries and large rivers of Europe. 



Order II. MALACOPTERI. 



Endoskeleton ossified ; exoskeleton in most composed of cycloid scales, in a few 

 of ganoid scales : fins supported by rays, all of which, save sometimes the 

 first in the Dorsal and pectoral fins, are soft or many-jointed: the Mala- 

 copteri are abdominal or apodal ; with gills free and operculate, having a 

 swim-bladder and air-duct ; peritoneal outlets in many. 



Suborder APODES. 

 Family Mureenidee. 



Genus MUR^NA, Linn. 



7. The Murene (Murana Helena, Linn.). 



Fig. Bloch, Hist. Nat. des Poissons, pi. 153. 

 Hab. The Mediterranean. 



8. Murcena Helena, Linn., var. punctata, Castelnau. 



Fig. Cat. of Apodal Fish in Brit. Mus. p. 55. 

 Hab. The Mediterranean. 



9. The Tiger Murene (Mur&na tigrina, Linn.). 



Hab. The Indian Ocean : the present specimen is from the coast of 

 Sumatra. 



10. The Clouded Murene (Mureena ferruginea, BL). 



Fig. Bloch, Hist. Nat. des Poissons (ed. Schneider), fig. 105. 

 Hab. Indian Archipelago. 



11. The Brown Murene {Mureena unicolor, Laroche). 



Fig. Laroche, Annales du Museum, torn. xiii. pi. 15. 

 Hab. The Mediterranean. 



B 2 



