88 DEEP-SEA FISHES OF THE ATLANTIC BASIN. 



tween aiitepemiltimate luul ultimate aual rays. Pectoral stout aud much shorter thau ven- 

 tral, not roachiu.u- mu(;h more thau half way to its root. Scales smooth, those iu the lateral 

 line' somewhat eularf-ed, shiny, and conspicuous; the lateral line descending in a gentle cat- 

 enary curve to a point above the origin of the ventral. The arraugeineut of the photo- 

 phoros is very peculiar, and can best be understood by an examination of the figure. There is 

 a break in the series of supcranals, there being five on the lower part of the caudal peduncle 

 behind the extremity of the anal. There are ai)parently two posterolaterals, the pos 

 terior and highest near the lateral line, and forming the beginning of a series of 8, arranged 

 in the arc of a circle, the last being the highest in the group of mediolaterals, of which there 

 are 4. There is but one anterolateral, which is above the axil of the ventrals, slightly 

 behind it aud about midway between it and the lateral line. There is a large, triangular, 

 luminous patch in the space between the axil of the pectoral and the flap of the operculum, 

 which covers its anterior portion, and is itself decorated with a circular photo])hore. 

 There appears to be a luminous patch along the anterior margin of the preoperculum. 



Eadial formula: D. 11, 13; A. II, 14; L. lat. 35-36. 



A single specimen (Cat. No. 43770, IT. S. N. M.) was taken from the stomach of a cod 

 captured by the schooner Joseph 0., of Gloucester, on Brown's Bank; another by the Alba- 

 tross from Station 2127, in 19° 45' N. lat., 75° 04' W. Ion., at a depth of l,(i39 fathoms. 



COLLETTIA, Goode and Bean, n. g. 

 Myctophids, similar in form to Aethojrrora, with a pair of luminous bands on the ante- 

 rior part of the head and another on each side in the hollow of the first infraorbital bone. 

 Scales of lateral line somewhat enlarged. Type, Myctophum Bajinesquii, Oocco. 



COLLETTIA EAFINESQUEI, (Gocco), Goode and Beax. (Figure 100.) 



Nyctophua Bafinesqitii, Cocco, Alcuiii Salmon., etc., 1820, .sp. 1, tal). Ill, lig. 7.— Bonapaktu, Faim. Ital., fasc. 



xxxvn,pl. 120, fig. 2. 

 Scopclus Bajinesquii, GuNTHER, Cat. Fish. Brit. Mus., v. 1864, 410.— Giglioli, Elenco, 100.— Raff aele, Mitt. 

 Zool. Stat. Najiles, ix, 183, j)!. vu, lig. 7. 



A MyctophuM with a stout, short body, moderately compressed; with a rounded, blunt 

 snout, very large mouth, comparatively small eye; comparatively short, triangular dorsal 

 and aual, the former entirely iu advance of the latter aud inserted very far forward. 



Height of body 4 times in total length; length of head 3 times. Depth of body one- 

 fourth of total length. Caudal peduncle stout; its height nearly one-half height of body. 

 Eye moderately large, its diameter contained 2§ times in length of head; distance between 

 posterior margin of orbit and preopercular edge one-half diameter of eye. Snout very 

 short, obtuse, keeled, with profile abruptly declivous; its length one- third of diameter of 

 eye. Cleft of mouth slightly oblique, the lower jaw received within the upper. 



Mouth rather large, the maxillary extending to angle of preoperculum and behind orbit a 

 distance equal to two-thirds diameter of eye; its posterior extremity not dilated, and 

 entirely concealed under the scales of the cheek. Origin of dorsal over that of ventral, 

 considerably nearer to tip of snout than to root of caudal; its last ray in advance of origin 

 of anal. Ventral stout and long, reaching to origin of anal. Pectoral small, reaching to 

 root of ventral. Aual origin under the twt^lfth scah^ of lateral line; its last ray is directly 

 under adipose dorsal. Scales in lateral line, somewhat enlarged, luminous. 



Anterolaterals, 4, very irregular, the three posterior ones forming an isosceles triangle, 

 as in ^IJthoprora mctoj)ocl((mp((. Mediolaterals, 3, arranged much as in Myctophum puiic- 

 tatum. Posterolaterals, 2, arranged much as in A.cjfulyens (perhaps only one posterolat- 

 eral, if the photophore immediately below it should be recognized as belonging to the super- 

 anal series). Supcranals in two groups; 5 or (i in the first; 4 in the last. Precaudals, 4, 

 in nearly straight line, the last and uppermost at or near extremity of lateral line, the 

 others descending forward at an angle of ai)pro.\itnately forty-five degrees with axis of body. 

 Itadial formula: i>. 12; A. 15; L. lat. 32-35. 



