226 



Often found by the fisherman in Hobson's Bay, but never 

 brought to the Market ; it seems not to differ from the Medi- 

 terranean specimens. 



MTLIOBATIS NIEUHOFII. 



E-aja Nieuhofii, Bloch, Schneid., p. 36-1. 



Body of a fine light brown yellow ; with four or five transverse 

 bands of a beautiful blue ; these bands are irregular and inter- 

 rupted ; the tail and ventrals have a greenish hue. 



Only seen once at the Melbourne Market, in the month of 

 October, and the specimen was most kindly sent to me by Dr. T. 

 Black. I had previously seen several specimens from Singapore 

 and Malacca. 



Sub-class V. CYCLOLTOMATA. 



" Skeleton cartilaginous and metochordal, without 

 ribs, and without real jaws. Skull not separate 

 from the vertebral column. No limbs. Gills in 

 form of fixed sacs, without branchial arches, six or 

 seven in number of each side. One nasal aperture 

 only. Heart without brilbus arteriosus. Mouth 

 anterior, surrounded by a circular or sub-circular 

 lip, suctorial. Alimentary anal straight, simple 

 without csecal appendages pancreas, or spleen. 

 Generative outlet peritoneal. Vertical fins rayed. 



PETROMYZONTID^. 



" Body eel-shaped, naked. Subject to a meta- 

 morphosis. In the perfect stage with a suctorial 

 mouth, armed with teeth, simple or multicuspid, 

 horny, sitting on a soft papilla. Maxillary, mandi- 

 bulary, lingual, and suctorial teeth may be dis- 



