22(5 
Often found by the fisherman in Hobson’s Bay, but never 
brought to the Market ; it seems not to difi'er from the Medi- 
terranean specimens. 
MTLIOBATIS KIEUHOFII. 
Raja Hieuhofii, Blooh, ScJmeid., p. 36f. 
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 metocliordal, witliout 
ribs, and witbout 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 apertm“e 
only. Heart without brilbus arteriosus. Mouth 
anterior, surrounded by a circular or sub-cncular 
lip, suctorial. Alimentary anal straight, simple 
without csecal appendages pancreas, or spleen. 
Generative outlet peritoneal. Vertical fins rayed. 
PETEOAIYZONTIDA]. 
“ 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- 
