1-20. GADIDiE DINEMATICHTHYS. 795 



hh. Dorsal fiu single ; anal liu single; ventrals well developed. 



BiiOSMius, 442. 



hhli. Dorsal fins three; anal fins two Gadus, 44:». 



ffg. Chin without barbel; lower jaw projecting; scaleslarge; dorsalstwo; 



anal one Hypsicomktks, 444. 



dd. Frontal bone divided; top of head with a triangular exea\jBted area; no 

 barbel. (Mcrlucihia'.) 

 p. Lower jaw projecting; dorsals two; anal one; anal and 



second dorsal deeply eniargiiuite Meklucius, 445. 



aa. Body naked; mouth very large ; abdomen greatly dilatable; teeth very unequal; 

 jaws with very long, depressible canines. {Chiasmodon- 

 tinw) Chiasmodon, 44G. 



434.-BYTHITES Reinhardt. 



(Reinhardt, Dausk Vidensk. Selsk. Afhandl. vii, 178, 1833 ; type Bythites fuscusReiuh.) 

 Body elongate, covered with miuiite scales. Head large, thick; 

 mouth large; jaws equal; no barbel; bands of teeth in the jaws 

 and on vomer and ]>alatines. Branchiostegals eight; gill-membranes 

 united, free from the isthmus; eye moderate. Lateral line interrupted. 

 Vertical tins united ; ventral fins reduced to simple filaments, each com- 

 posed of two rays closely united. Air-bladder large; two pyloric coeca. 

 A thick, conical, anal papilla (in the male). Greenland. {fsuOhr^:;, au 

 animal of the depths, from jSuOujq, the deep.) 



1224. B. faascBBS Reinh. 



Uniform dark-brown. Head with minute cirri; snout obtuse; maxil- 

 lary extending to below eye; vertical fins enveloped in thick skin; ven- 

 trals two-thirds as long as head. Depth less than length of head. 

 Greenland. {Gibither.) 



(Eeinhardt, 1. c. 179; Giiuther iv, 375.) 



435.— DI]\EI»IATICHTHYS Bleeker. 



(lirostnojylnjcis Gill: Hallas Ayras.) 

 (Bleeker, Batoe, 318; type Dincmatichthyti Uyocoeteoides iiU'i^lieT.) 



Body moderately elongate, covered with minute imbedded scales; 

 lateral line inconspicuous; head moderate, conical; opercle with a 

 spine posteriorly; preopcircle unarmed, usually with a large mucous 

 I)ore at its angle; no barbels; jaws subequal ; teeth in the jaws cardi- 

 form, in bands anteriorly; vomer and palatines with similar teeth; 

 gill-membranes little connected. Dorsal fin low, continuous, its last 

 rays contiguous to the caudal, but nearly or quite free Irom it; anal 

 fin even, similar to dorsal, but shorter; rays of vertical fins slender, 

 much branched; ventrals reduced each to a filament formed of two rays 



