215 



seen one specimen at one of the fishmonger's (Allen), in the 

 month of March. Professor M'Coy says it is common near 

 Portland, in the western part of the Colony, and it has also 

 been found in Tasmania. 



The colour is of a silvery grey, darker on the back, but with- 

 out spots or bands. 



Order II. PLAGIOSTOMATA. 



" From five to seven gill-openings. Jaws distinct 

 from skull." 



Sub-order I. SELACHOIDEL 



" Gill- openings lateral. Body more or less 

 cylindrical." 



(SHAEKS.) 



CAECHABIIDiE. 



" The first dorsal fin opposite to the space 

 between pectoral and ventral fins without spine ; 

 an anal fin. Eye with a nictitating membrane. 

 Mouth crescent-shaped, inferior." 



I have found it, until now, almost impossible to induce the 

 fishermen to bring to the market specimens of sharks, which are, 

 unfortunately, but too common in Hobson's Bay. The only sorts 

 I have been able to obtain are the following, but many more 

 inhabit these waters. It is is curious that none of the hand- 

 somely spotted sorts, that are so common at the Cape of Grood 

 Hope, are found here. 



ZYGrvENA. 



Formed by Cuvier on curious sorts of sharks, having the head 

 made like a hammer. 



