44 



THE VOYAGE OF H.M.S. CHALLENGER. 



Antigonia, Lowe. 



Antigonia capros. 



Antigonia capros, Lowe, Proc. Zool. Soc. Lond., 1843, p. 85. 



„ ,, Giinth., Fish., vol. ii. p. 497. 



„ „ Steiudachner, Denkschr. d. k. Akad. d. "Wiss. "Wien, xlix, 1884, p. 187, pi. v. 



Caprophonus aurora, Miill. and Trosch., Hor. ichth., iii. p. xxviii. taf. v. fig. 1. 

 Ilypsinotus mbcsrcna, Schley., Fami. Jap. Poiss., p. 84, pi. bcii. fig. 2. 



,, ,, Giinth., Keport on the Shore Fishes, Zool. Chall. Exp., part vi. p. 44. 



Steindachncr observes that the height of the body decreases with age relatively to 

 the length of the fish. This is true within the limits of more or less advanced age, but 

 exactly the reverse is the case when young specimens are taken into consideration, as I 

 have already mentioned in the Report on the Shore Fishes, and as will be seen from the 

 following table, in which the total length is given with exclusion of the caudal fin : — 



a. Ki Islands, . 

 h. Ki Islands, . 



c. Ki Island.s, . 



d. Manado, 



e. Japan, 

 /. Barbados, 

 g. Madeira, 



Probably the proportions of the body are also subject to some slight individual varia- 

 tion, as is also the case with respect to the length of the third and longest dorsal spine, 

 which in old specimens is much shorter than the head, whilst it is comparatively more 

 slender and longer in some of the younger specimens. At a certain age a blackish ocular 

 band is visible, with traces of a second below the commencement of the dorsal fin. 

 These bands are visiljlc in specimen b, but not in a or c. 



This fish is an inhabitant of moderate depths and has a wide distribution ; it is 

 therefore not very scarce. We have received specimens from Madeira, Barbados and 

 Manado; several collectors have found it in Japan, and the Challenger obtained three 

 .specimens near the Ki Islands, from a dcptli of 129 fathoms. 



Diretmus. 



Diretmus, Johns., Proc. Zool. Soc. Lond., 1863, p. 403. 

 Discus, Campbell, Trans. New Zeal. Inst., vol. xi., 1879, p. 297. 



Body much compi-essed, .short and elevated, covered with small, coarsely spinous 

 scales, on which no lateral line can be traced ; abdomen prominent and keeled. Mouth 



