290 DISCOVERY REPORTS 



Described from 2 specimens, 103 and 130mm. in length; one is the type of 

 Diplophos corythaeohim, and the other a paratype of Polymetme illustris received in 

 exchange from the AustraHan Museum. 



Hob. Coast of Natal; Andaman Sea; Southern Australia. 



I have no hesitation in uniting these three species. The number and arrangement of 

 the photophores is exactly the same in all of them, and the only difference is in the 

 number of anal rays — about 24 in corythaeola, 27-32 in illustris, and 25 in ajricana. 



Genus Vinciguerria, Goode and Bean 



Poweria, Bonaparte, 1840, Icon. F. Ital. ill (under Ichthyococcus poweriae), sign. 1838** [2]. 

 Vinciguerria (Jordan and Evermann), Goode and Bean, 1895, Ocean. Ichth. p. 513 ; Jordan and 

 Evermann, 1896, Bull. U.S. Nat. Miis. XLvn (i), p. 577. 

 Zalarges (Jordan and Williams) Jordan and Starks, 1895, Proc. Calif. Acad. Sci. (2), v, p. 793. 



Close to Gonostoma and Yarrella. Both jaws with a single series of teeth of varying 

 sizes ; teeth present on vomer, palatines and pterygoids. Scales developed. Photophores 

 conspicuous. Dorsal 13-14. Anal 14-15 ; origin below middle or posterior part of dorsal. 



Five or six species. 



I have not sufficient material to undertake a revision of this genus, but give a list of 

 the species, with a fairly complete synonymy in each case. The species are so close to 

 one another that in many cases it is impossible to be certain as to which one any par- 

 ticular author was considering unless a reliable figure is provided. For this reason, the 

 synonymies given below cannot be regarded as more than tentative. Jespersen and 

 Taning have given a full account of the two Mediterranean species {V. poweriae and 

 V. attenuata) and have pointed out the characters which distinguish these from V. 

 sanzoi and V. lucetia. The four species may be recognised as follows: — 



I. No photophores at the symphysis of the mandibles. 



A. Length of row of photophores from origin of anal to base of caudal shorter than head ; 

 12 (occasionally 11) gill- rakers on lower part of anterior arch. i. poweriae 



B. Length of row of photophores from origin of anal to base of caudal longer than head ; usually 

 14 gill-rakers on lower part of anterior arch. 2. attenuatus 



IL A pair of photophores at the symphysis of the mandibles. 



A. 24-25 (13 + 11-12) photophores in the upper series; 13-14 gill-rakers on lower part of 

 anterior arch; dorsal with 14-15 rays; anal with 13-15 rays. 3. sanzoi 



B. 21-22 (11-12 + 10-11) photophores in the upper series; 19-20 gill-rakers on lower part 

 of anterior arch; dorsal with 13-14 rays; anal with 14-16 rays. 4. lucetia^ 



Vinciguerria poweriae (Cocco). 



Gonostomus poweriae, Cocco, 1838, A^. Ann. Sci. Nat. u, p. 167. 



Ichthyococcus poweriae, Bonaparte, 1841, Icon. F. Ital. (27), Indice [4] and (138**), fig. 



Scopelus poweriae, Cuvier and Valenciennes, 1849, Hist. Nat. Poiss. xxn, p. 441. 



^ Gonostoma brevidens (Kner) Steindachner (1870, SitzBer. K. Akad. Wiss. Wien, lxi (i), p. 443) seems 

 to be a species of Vinciguerria, but I am unable to identify this. 



