414 Bulletin 47, United States National Museum. 



675. HIODON SELENOPS, Jordan & Bean. 



Head4i; depth 4; eye 2J. D. 12; A. 27; lateral line 50. Body more 

 elongate than in the other species of Hiodon, little compressed, not much 

 elevated, the belly nowhere carinate. Eye very large. Pectorals not 

 reaching to ventrals. Coloration clear silvery. Tennessee, Cumberland, 

 and Alabama rivers, scarce ; recorded from Nashville, Chattanooga, and 

 Montgomery. (af'Aijvrj, moon; wi/;, eye.) 



Hyodon selenops, JORDAN & BEAN, Bull. II. S. Nat. Mus., x, 67, 1877, Chattanooga, Tenn. 

 (Type, No. 19844); JORDAN & GILBERT, Synopsis, 260, 1883. 



Family LIX. CHANID.E. 



(THE MILK FISHES.) 



Body oblong, compressed, covered with small, firm, adherent scales. 

 Lateral line distinct. Abdomen broad and flattish. Snout depressed; 

 mouth small, anterior, the lower jaw with a small symphyseal tubercle; 

 no teeth ; premaxillary joined to upper anterior edge of maxillary. Eye 

 with an adipose eyelid. Gill membranes broadly united, free from the 

 isthmus. Branchiostegals 4 ; pseudobranchise well developed ; an acces- 

 sory branchial organ in a cavity behind the gill cavity. Dorsal fin 

 opposite the ventrals ; anal fin shorter than dorsal. Mucous membrane 

 of oesophagus raised into a spiral fold; intestine with many convolu- 

 tions. Coloration silvery. Vertebrae about 45. Large fishes of the 

 warmer parts of the Pacific. One genus and three species known. 

 (Clupeidw; group Chanina, Giiuther, Cat., vn, 473, 1868.) 



201. CHANGS, Lace"pede. 



Chanos, LACEPEDE, Hist. Nat. Poiss., v, 395, 1803, (arabicus). 



Lw/o(Zeira(KuHL) RUPPEL, Neue Wirbelthiere Abyssinia, 18, 1835, (chanos). 



Ptijcholepis, GRAY, Dieffenbach's Travels in New Zealand, n, 218, about 1842, (salmonem). 



Characters of the genus included above. (%uvo(;, name in modern 

 Greek, from #for, the open mouth.) 



676. CHANOS CHANOS (Forekal). 

 (MILK-FISH; SABALO ; AWA ; CHANI ; ANGED.) 



Head 4|; depth 4. D. II, 12; A. II, 9; scales 12-86-14. Vertebrae 

 19 -f- 26 = 45; snout 3i; eye3|; maxillary 4. Pectoral 13; ventral l; 

 caudal i longer than head ; dorsal 1 in head. B. 4. Aspect of a large 

 Cyprinoid. Body elliptical, moderately compressed, the caudal peduncle 

 slender. Head pointed, rounded above. Eye and side of head covered 

 by a large transparent, imperforate adipose eyelid. Mouth small, terminal 

 toothless, transverse, the lower jaw included : maxillary broad, slipping 

 under the adipose preorbital, without supplemental bone. Opercle trun- 

 cate behind. Pseudbranchise very large. Gill rakers fine and flexible, 

 very close set, rather long. Bones of gill rakers flexible. Gill arches all 

 connected by membrane. Lateral line well developed. Scales firm, 

 cycloid, with strongly marked longitudinal striae. Scales rather large, 

 hard, firm, enamelled, becoming bony when dry, used by the Indians for 

 ornamental work. Dorsal inserted somewhat nearer snout than base of 

 caudal, before ventrals, its first ray falcate, its last produced in a short 



