132 RECORDS OF THE ATSTRAMAN MUSEUM. 



Myxus, G'nnther. 



Myxus ELOXdATUS, (jihiflier. 



My.i-n.< elo)i(/utns, Ciunthei-, Hrif. Mns. Cat. Fisli., iii., 1861, p. 466. IJ., 

 Waited Tr. Roy. Sue. S.Aiihtr., xl., 1916, p. 454, pi. xliv. 



}[>i<lil cri'iiideiis, Kiier, Nuvara Zoo!., i., 1865, p. 229, pi. ix., Hg. 4. 



Mi/,i;i(s rrenideii!', Steiiidacbiier, Sitzb. Akad. Wiss. Wieii, liii.. 1866, p. 461. 



Gaestriix iinrfolci'iisU, Ogilb\', Proc. Liiiu. Soc. N.S.Wales, xxii., 1897, p 80. 



Sijininijnttj. — Steiudacliiier has sliowii that Mit'/il creiiideiis is a species 

 of Mii,vus, and I find nothing to distinguish it from Mi/.vitt< elomjutus. The 

 identity of {'uestrus iiorfolcem^is and M. dmnjatu^ has ah'eady been 

 published by Waite. 



Family APOGONJD^. 

 Genus Adkxapogon, (joi. nar. 



First dorsal witli six spines, anal with two ; soft doisal and anal 

 eacli with about ten rays. Preopercular margin and inframaiginal crest 

 entire. Scales cycloid ; lateral line complete, extending over about 26 

 scales. A baud of villiform teetli in each jaw, without canines, and some 

 minute teeth on the vomer ; palatines with or without teeth. Gill-rakers 

 slender and numerous, about twelve on the lower limb of the first gill-arch. 

 Caudal emarginate, its peduncle shorter than the head. A silver}' canal 

 extends backwards on each side from the tongue to the caudal peduncle 

 near the ventral surface. Otherwise as in Apoyon. 



(jenotype. — Apnyo)) ru><elyaster, Ramsay & Ogilby. 



Ajfinities. — This genus differs from Si'iilKditiit, Weber'', in which a 

 similar silvery canal is developed, in having cycloid instead of ctenoid 

 scales ; its jiieopercular margin also is smooth instead of serrated. In 

 these characters it agrees Avilh Ixlnibdaiiiio, Webei-'', but the siivery 

 oi'gau is wanting in that genus. 



Weber has suggested ('J'<i}ii. cif., p. 244) that the silveiy canal 

 extending along each side of the body behind tlie anal fin in various 

 Apogonids is an invagination of the peritoneum, which perliaps serves as 

 a hydiostatic apparatus to enable deeper watei" species to ascend to 

 sliallower depths. Jn A. rosciyKstrr and .1. irnddi, both of whicli occur in 

 sliallow water, tliis canal appears to have no connection witli the body- 

 cavity, but is continued forward to a thick gland which is situated at the 

 base of the tongue, and appears to be a phosphorescent organ. 



5 Weber— Siliu^r., Ex])»>(l., Ivii., ]lM:t. \,. JlH. 

 •> Weber — Tom. cil.. ji. liM). 



