412 Bulletin ^7, United States National Musetifu. 



Albidn (joreeiiais, Cuvier & Valenciennes, Hist. Nat. Poiss, xix, 342, lS4fi, Gorea. 



Albida neoijuinaic.n, CuviEU & Valenciennes, I. c, xix, .350, 1846, New Guinea. 



AWtila semimidn, CuviEU & A''alenciennes, I. c, xix, '.i'A, 184G, New Guinea. 



Alhnla eriilhrochcilos, CiiviER & VALENCIENNES, /. c., xix, 352, jil. 540, 184G, Friendly Islands 



AUiiihifnrsleri, Cuvier & Valenciennes, J. c, xix, 354, 1S4C, Tahiti. 



Alhnhi roslrata, Gronow, Cat. Fishes, 189, 1854, American Ocean, etc. 



Allinla rmiorhynrhns, GiiNTllKU, Cat., VII, 4G<S, 18(58. 



Alhitht milpe$, JORDAN & Gilbert, Synopsis, 258, 1883. 



Family LVIII. HIODONTIDiE. 



(Thk Moon-eyks.) 



Body oblong, much compressed, covered with moderate-sized, hiil- 

 liantly silvery, cycloid scales. Head naked, short, the snout bluut. 

 Mouth moderate, oblique, terminal, the jaws about equal. Premaxilia- 

 riea not protractile. Maxillary small, slender, without evident supple- 

 mental bone, articulated to the end of the premaxillary, and forming the 

 lateral margin of the upper jaw. Dentition very complete; premaxillary 

 and dentary bones with small, wide-set, cardiform teeth; maxillaries 

 with feeble teeth ; a row of strong teeth around the margin of the tongue, 

 the anterior canine and very strong; between these is a band of short, 

 close-set teeth ; vomer with a long, double series of close-set, small 

 teeth; similar series on the palatines, sphenoid and pterygoids; sides 

 of lower jaw fitting within the upper, so that the dentaries shut 

 against the palatines. Eye very large, the adipose eyelid not much 

 developed. Preorbital very narrow. Nostrils large, those of each side 

 close together, separated by a flap. Gill membranes not connected, free 

 from the isthmus, a fold of skin covering their base. No gular plate. 

 Branchiostegals 8 to 10. Gill rakers few, short, and thick. Pseudo- 

 branchiae obsolete. Lateral line distinct, straight. Belly not serrated. 

 Dorsal fin rather posterior ; anal elongate, low ; ventrals well devel- 

 oped ; caudal strongly forked ; no adipose fin. Stomach horseshoe- 

 shaped, without blind sac ; one pyloric crecum. Vertebra} about 60. 

 Air bladder large. No oviducts, the eggs falling into the cavity of the 

 abdomen before excllision. A single genus, with three species, inhabit- 

 ing the fresh waters of North America; handsome and gamy fishes, of 

 little value as food. {Hi/odontida', Giiuther, Cat., vii, 375, 376, 1868.) 



200. HIODON, Le Sueur. 

 (Moon-eyes.) 



nMnn* liE Sueur, .Tourn. Ac. Nat. Sci. Phila., i, 1818, 334, {lergums). 



Olossodov,* Kafinesque, Aiuer. Montlily Mag.,ii, Sejitember, 1818, 354, (Iiarenijoides). 



Amphiodon, Rafinesqi^e, .lourn. de Physique, 421, 1819, {nlosoides). 



Clodabis, Rafinesqi-e, Ichth. Oh., 43, 1820, (clf>dahis = tcrgisus). 



Glossodon, Heckel, Russi'gi;ers Reisen, i, 1633, 1842, {s^)nthii = <dosoides). 



ElatlonisUits, GiLL & Jordan, Bull. U. S. Nat. Mus., x, 68, 1877, {chrysopsis — alosoides). 



HyodoH, corrected orthography. 



* It is not certain which of these two names, Hiodon and Glossodon, has precedence of date. 

 Iliodon isin common use and was accompanied by a much better description than Rafinesque 

 usually furnished. We therefore retain it. 



