74 DEEP-SEA FISHES OF THE ATLANTIC BASIN. 



MYCTOPHITM GRACILE, (LCitken), Goode and Bean. 



Scopelus gracilis, Lijtken, Spoli.a Atlautica. ii, 1892,255, fig. 13. 



A species closely allied to M. Humboldfi. hiiviiip; medinlateral photopliores two, antero- 

 lateral two, posterolateral one, over the break iu tbe anal series, which is much in front of 

 the soft dorsal and over the middle of the anal tin, the number of anal photophores being 

 5-7 + 11-14. The pe(;toral is moderate, not passing the second anterolateral photophore. 

 The caudal photophores arc close together as in M.j)unctatum. ' 



Kadial fornnila: D. 12; A. 19; L. lat. 41. 



Liitken had several specimens, presumably from the surface, taken in the- following 

 localities: M. lat. 22°, W. Ion. 34O.30'; N. lat. 22° 12', W. Ion. 48°; S. lat. .35° 36', E. Ion. 

 27° 40'; between S. lat. 32° 40', E. Ion. 55° 20', and S. lat. 11° 50', E. Ion. 8° 10'. . 



MYCTOPHUM BENOITI, (Cocco), Goode and Bean. (Figure 83.) 



Scopelus Benoistti, Cocco, Lett. s. Salmon, 12, pi. ii, fig. 4. 



Scopelus Benuiti, Bonaparte, Icon. Faun. Ital., Pesc, c. fig. 



Canestrini, Faun, d'ltalia, Pesci, Fasc. xxxvii.— Gunther, Cat. Fish. Brit. Mus., V. 406.— Giglioli, 

 Elenco, 100.— Raffaei.e, Mitt. ZooL Stat., Naples, IX, 181, pi. vii, fig. 2.— LCtken, Spolia Atlantica, 

 1892, II, 256, fig. 14. 



The height of the body is contained 4 times in the total length (without caudal); the 

 head .3^. The snont is obtuse, conical, the upper and lower protiles nearly equally curved. 

 The eye is large, its diameter a little less than half the length of the head. The dorsal is 

 postmedian, nearly midway between the snout and the root of the caudal, and behind the 

 base of the ventral. The pectoral extends nearly to the end of the ventral. The photo- 

 phores are arranged as follows: Mediolaterals, 2; anterolaterals, 2; posterolaterals, 2, over 

 the break in the superanal series, which is not far in advance of the vertical connecting 

 the base of the last anal rays with that of the soft dorsal. The two anterolaterals far apart, 

 the caudals near together, the last far below the end of the lateral line. Number of super- 

 anals, .'>-(■>+ (5-7. 



Radial formula: D. 12-13; A. 17-18; L. lat. 39-40. 



(liinther gives Norway and Greenland as the range of this species, but cites no au- 

 thority for this, and appears to have examined oidy Mediterranean material. The species 

 has been observed at Nice and Messina, whence the National Museum has specimens (Cat. 

 No. 40063) received from the Itoyal Museum of Florence. Liitken had a specimen, 40 milli- 

 meters long, from N. hit. 34° 40', W. Ion. 24° 20'. His type, as well as the Messina speci- 

 men examined by us, has a luminous plate on the top of the caudal peduncle. 



MYCTOPHUM REINHARDTII (LOtken). 

 Scopelus Beitthartltii, LiItken, Spdlia Atlantiea, ii, 1892, 257, fig. 16. 



A species of Myctophum resembling 3f. BenoiU in general appearance, but having the 

 anterolateral photophores much closer together than in that species, the foremost being, as in 

 il/. Benoiti, almost directly above the root of the ventral fin. The pi-ecaudals are well sep- 

 arated, the posterior one considerably above the anterior, and touching the extremity of 

 the lateral line. Pectoral long, falcate, extending quite to the lower mediolateral jihoto- 

 phore, and almost to the vertical from the vent. The number of the superanals is 4-7 -f 7-8. 



I iadial formula: D. 11 ; A. J 6. 



The two examples studied by Liitken were obtained ft-om N. lat. 34° 22', W. Ion. 18° 

 10', and N. lat. 5° 31', W. Ion. 2.$o l.^-.'. One of these had a luminous plate on the top of 

 the caudal peduncle, the other a similar plate below. 



MYCTOPHUM REMIGER, Goode and Bean, n. s. (Figure 84.) 



Depth of body is one-fourth of total length. Length of head 3| times in total length. 

 Least height of tail about two-thirds of its greatest height. Snout very short, the upper 

 and lower profile of the head being similar; its length a little less than one-half diameter 



