[51] CATALOGUE OF THE FISHES OF NORTH AMERICA. 



$ Eaox. 



600. £so2 luciuB LinusBus. £u. Vu. (576) 



§ Mascalongus Jordan. 



601. Esox nobilior Thompson. Vn. (577) 



Order Q.— XENOMI.^ 



Family LVII.— DALLIID^. 



167.— DALLIA Bean. (166) 



602. Dallia pectoralis Bean. Y. (57-2) 



Order R— COLOCEPHALI.^ 

 Family LVIIL— MUE^NID^. (52.) 



168.— MURiENOBLENNAs Lac6pfede. 



603. Muraenoblenna nectura Jordan & Gilbert. P. 



169.— MUR^NA LinnsBUS. (168) 



604. Muraena retifera Goode & Bean. S. (578) 



605. Muraena pinta^ Jordan & Gilbert. P. 



170.— SIDERA Kaup. 



606. Sidera castanea 5 Jordan «& Gilbert. P. 



607. Sidera mordax Ayres. C. (579) 



608. Sidera dovii<5 Giinther. P. 



609. Sidera ocellata Agassiz. S. (5H0) 



' The genus Dallia, although agreeing in many external characters with Umbra, 

 hae very little affinity with that group or any other of our fishes. Its skeleton is so 

 peculiar in structure that it has been taken by Dr. Gill as the representative of a 

 peculiar order or suborder, Xenomi, which is thus defined : 



"Teleosts with the scapular arch free from the cranium laterally and only abut- 

 ting on it behind, coracoids represented by a simple cartilaginous plate without de- 

 veloped actinosts, and with the intermaxillary and supramaxillary bones coalescent." 

 (AfVoS, strange ; (o/iioi, shoulder.) 



-Order Colooephali Cope, Trans. Am. Philos. Soc, 1871, 456 (includes the Murce- 

 iiidce). 



3Mur.«;noblenna Lac^pMe. 



{Gymnomurwna Giinther, not of Lac6p6de, as restricted by Kaup.) 



(Lac^pede, His. Nat. Poiss., V, 652, 1803 ; type Murwnoilenna olivacea Lac6p^de.) 



This genus differs from Murcena chiefly in the reduction of the fins to a short fold, 



surrounding the tail. Posterior nostrils not tubular. Gape, moderate. Tropical 



seas. (Mupa^Va, eel ; (jXevva, sMvaQ. " Blenna en grec, signifi6 mucosit^." Lac6- 



p^de.) Murcenohlenna nectura =: Gymnomurcena nectura Jordan & Gilbert, Proc. U. S. 



Nat. Mus., 1682, 356. Cape San Lucas. 



* Murania pinta Jordan & Gilbert, Proc. U. S. Nat. Mus., 1881, 345. Gulf of California 



and southward. 



^Sidera castanea Jordan & Gilbert, Proc. U. S. Nat. Mus., 1883, 208. Mazatlan and 



southward. In this paper is an analysis of the characters of the species of Sidera 



found on the Pacific coast of America. 

 ^Murcena dovii Giinther, VIII, 103, 1870 ; ^Mwcena pintita Jordan & Gilbert, Proc. 



U. S. Nat. Mus., 1881, 346; 1883, 209. Mazatlan to Gallapagos Islands. 



