REPOET OF COMMISSIONER OF FISH AND FISHERIES. [40] 



485. Myctophum miilleri^ Ginelin. G. (4(57) 



486. Myctophum boops- Richardson. A. 



125.— MAUROLICUS3 Cocco. (132) 



487. Maurolicus borealis Nilsson. B. (4(58) 



Head depressed, with the snout produced, flat above. Cleft of the mouth very wide, 

 ■with the lower jaws projecting ; premaxillary very long, styliform, tapering, not mov- 

 able; maxillary obsolete. Teeth in the jaws in broad bands, not covered by lips, curved, 

 unequal in size, and barbed at the end ; a series of similar teeth along the whole length 

 of each side of the palate ; a few teeth on the tongue, and groups of small teeth on 

 thehyoid; eye moderate, lateral. Pectoral moderate; ventrals 8-rayed, inserted close 

 behind pectoral. Dorsal fin median, of about 18 rays; adipose tin present or absent; 

 anal moderate; caudal emarginate. Gill openings very wide, the gill membranes 

 separate,freefroni the isthmus. Branchiostegals 11 or 12. Gill laminse well developed; 

 gill-rakers tubercular ; pseudobranchiic well developed. Scales rather small. Deep- 

 sea fishes. (iSa&vS, deep ; davpoi, 8atiru8 = iSjinodus.) 



Bathysaurus agassizii Goodc" & Bean. 



Body elongate, subterete. Head alligator-like, naked, except on cheek and occiput, 

 with strong nasal and interorbital ridges ; its greatest width more than half its length ; 

 gape of mouth very wide, one-sixth length of body, extending behind eye for a dis- 

 tance equal to interorbital width. Premaxillary with two irregularrowsof depressible 

 teeth, some of them barbed, those of inner row much the largest; lower jaw enor- 

 mously strong, its sides projecting beyond the upper jaw ; its dentary edge Ihickly 

 studded with depressible teeth, many of them, especially the larger inner ones, 

 strongly barbed; those in front, claw-like, recurved; three rows of teeth on the 

 palatines, the middle ones very much enlarged and most of them strongly barbed, 

 these being the largest of all the teeth. On the tongue a few weaker teeth, and 

 groups of similar teeth on the vomer. Insertion of dorsal behind .snout at a distance 

 a little more than its own base and about one-third the total length; longest ray 

 equal to greatest depth of body. No adipose dorsal (in the specimen known); anal 

 inserted considerably behind last ray of dorsal, its base about half that of the dorsal. 

 Ventrals well apart, inserted just in front of dorsal, their length half head. Pectoral 

 as long as lower jaw, its seventh ray prolonged to a length equal to that of head. 

 Caudal slightly forked; scales thin, cycloid, deciduous, those of the lateral line 

 larger, brownish ; lining of gill cavity blue-black. Head, 3^; depth, 7. B. 10, D. 17, 

 A. 11, C. 19, P. 15, A. 8. Scales, 8-78--. Length, 18 inches. 



Gulf Stream, lat. 33°, at a depth of 647 fathoms. {Goode cf Bean.) 



(Goode & Bean, Bull. Mus. Comp. Zocil., 1882, 21;').) 



iThis species should stand as Jilyciophum miilleri instead of M. glaciale. To the 

 synonymy add : Salmo miiUeri Gmelin, Syst. Nat. 1788, 1378 ; Scopelus miiUeri, Collet, 

 Norsko Nordhavs Exited., 1880, Fiske, 158; Sco2)elus miiUeri Goode &. Beau, Bull. Mus. 

 Comp. Zocil., 1882, 223. 



This species has been lately taken in the deep waters off Southern New Enghuid. 



'^Myctophum hoops Richardson. 



Depth of head If in its length ; eye nearly 3 in head ; twice its distjjnce from 

 preopercle. Snout short, obtuse, its upper profile descendiug in a strong curve ; Jaws 

 equal ; maxillary reaching nearly to angle of preopercle, slightly and gradually dilated 

 behind; cleft of mouth very slightly oblique. Origin of dorsal considerably nearer 

 tip of snout than root of caudal, above base of ventrals ; its last ray before origin of 

 anal; pectoral reaching vent. Scales smooth, thin, and deciduous. Head 3i ; depth 5. 

 D. 14. A. 21, V. 8 Scales 3-38-5. L. 4^ inches. Vancouver's Island. (GUiilhcr). 



(Richardson, Zool. Erebus and Terror. Fishes, 39, pi. 27. Scopelus hoops, Giinther, 

 V, 408.) 



=♦ According to Professor Gill, the genus Maurolicus belongs to the ScopeUdK and 

 not to the Slernoptychidw. 



