30 " THETIS " SCIENTIFIC RESULTS. 



SELACHII. 



Family HETEEODONTIDJE. 



HETERODONTUS, Blainville. 



HETERODONTUS PHILLIPI, LacifUe. 

 Port Jackson Shark. 



(Plate i. — Gyrojjleurodus galeatus, Giinth.) 



Le Squale Philipp, Lacep., Hist. Nat, Poiss., i., 1798, p. 218. 

 Heterodontus phillipi, McCoy, Prod. Zool. Vict., Dec. xii , 1886, 

 pi. cxiii. 



Stations 10, 15, 20, 21, 22, 23, 24, 25, 26, 32, 34, 50, 51, 52. 



We did not obtain this species in water deeper than 48 

 fathoms ; it is not included in the captures of the Challenger 

 Expedition off Twofold Bay (Station 163a, 120-150 fathoms), and 

 no observations on its vertical range have been made. We took it 

 in 10 fathoms, while it is very common in 6 or 7 fathoms within 

 the harbour of Port Jackson. 



Geographically it extends to Southern Australia, being common 

 in Hobson's Bay. It occurs also in Tasmania and is recorded 

 from New Zealand, where, however, it must be extremely rare. 

 Apparently its inclusion rests on the evidence of two specimens 

 presented to the British Museum by Professor Owen and said to 

 have been obtained in New Zealand. Hutton includes it in his 

 Catalogue* on this authority, but writes: — "I have seen no 

 specimens." It is mentioned bySavilleKent,tas being occasionally 

 taken in Moreton Bay, Queensland, but it does not seem to have 

 been recorded on our own coast northward of Broken Bay. We 

 took it off Cape Hawke (Station 32), thence southward to Shoal- 

 haven Bight (Stations 50, 51 and 52). It had been previously 

 obtained in Jervis Bay, and from my own experience I should 

 say it is as common there as on any part of the coast. Jervis 

 Bay is a favourite breeding resort, and the empty egg-cases may 

 be found in large numbers washed on to the beach or wedged in 

 among the rocks : here also in 20 fathoms and under, living 

 eggs may be freely obtained. Not being the proper season, we 

 secured onl}' empty cases; these were twice obtained, namely, in 

 Jervis Bay (Station 54) and in Newcastle Bight (Station 22). 



• Hutton— Fishes of New Zealand, 1872, p. SO. 



t Saville Kent — Oyster and Oyster Fisheries, Queensland, 1891, p. 11. 



