46 ATHERINID.E : SILVERSIDES 



73. Craterocephalus obscurus (Castelnau), 1875. 



Atherinichthys obscura Castelnau, Researches Fishes Australia, 31, 1875; Macleay, 

 Proc. Linn. Soc. N. S. Wales, 6, 43, 1881 (1882) (after Castelnau). 

 Type-locality. — Swan River, Western Australia. 

 Range. — Swan River, Western Australia. 



The few distinctive features given in Castelnau's description of this 

 fish point toward relationship with the species of Craterocephalus. 



74. Craterocephalus pauciradiatus (Giinther), 1861. 



Atherina pauciradiata Giinther, Catalogue Fishes Brit. Mus., 3, 401, 1861 ; 

 Macleay, Proc. Linn. Soc. N. S. Wales, 6, 39, 1881 (1882) (after Gunther). 

 Type-locality. — Northwestern Australia. 

 Range. — Northwestern Australia. 



This very distinct species seems to be most similar to those of 

 Craterocephalus. The gill-rakers are not described. 



One of the fresh-water Atherinid^ of New Guinea, described by 

 Dr. Weber as Atherinichthys nouhysi, belongs in the Atherinin.e 

 but enters none of the genera of that group as we defined them. Hence 

 we were disposed to make it the type of a new genus. It has the body 

 rather more robust than usual in Atherina; the eye is less anterior in 

 position, being located in the middle third of the length of the head; the 

 gape is greatly restricted laterally, being only about half as long as the 

 jaws, which do not quite reach to below the front margin of the eye. 



Two Australian species, which are apparently not referable to 

 Atherina or Hepsetia, we provisionally include in this group, as they 

 seem to have some characters, at least, in common with A. nouhuysi. 



In a letter dated September, 1919, Dr. Lieven F. de Beaufort informs 

 us that both Dr. Max Weber and himself regard A. nouhuysi as a species 

 of Craterocephalus, a view which we provisionally adopt as this memoir 

 passes through the press. 



75. Craterocephalus nouhuysi (Weber), 1910. 



Atherinichthys nouhuysi Weber, Notes Leyden Mus., 32, 229, 1910; Nova 

 Guinea, 9, 555, fig. 26, 1913 ; Regan. Trans. Zool. Soc'. London, 20, 276, 1914 

 Type-locality. — Lorentz River, New Guinea. 

 Range. — Streams of northern New Guinea. 



76. Craterocephalus esox ( Klunzinger), 1872. 



Atherinichthy.s fsox Klunzinger, Arch. Naturg., 38, 34, 1872; Sitzb. Akad. Wiss. 

 Wien, 80, 394, 1880. 

 Type-locality. — Port Philip, Australia. 

 Range. — Known onlyfrpm the type-locality. 



v^w^ Craterocephalus jacksonianus (Quoy and Gaimard), 1824. 



Atherina jacksoniana Quoy and Gaimard, Foy. Uranie, Zool., 333. 1824; 

 Cuvier and Valenciennes, Hist. Nat. Poiss., 10, 461, 1835. 



