DISCUSSION OF SPECIES AND THEIR DISTRIBUTION. 81 



length of head. Snout moderate, with obtuse tip. Cleft of mouth slightly oblique, curved 

 downward below eye. Origin of dorsal slightly in advance of origin of ventral ; equidistant 

 from origin of adipose dorsal and anterior margin of orbit. Pectoral half as long as ventral. 

 Dorsal much taller and longer than anal, but closely resembling it in form. 



Mediolateral photophores, 3; anterolaterals, one or two, the former in an obliquely verti- 

 cal row, as in ?,LpuHctatitm. I'recaudals in low, horizontal line. A single posterolateral in 

 front of soft dorsal. Superanals, 4-5, 5-6. Eadial formula: D. 14; x\. lii; L. hit, .55. 



This species, described by Cocco, from Sicily, and named by him in honor of Dr. Carlo 

 Gemellaro, of Catania, a local geologist of note, has been found only alxmt Messina, where 

 it is regarded as very rare, although Giglioli obtained nine individuals at the time of his 

 great capture of scopelids, in September, 1878. One of these (Cat. No. 44170, U. S. N. M.) 

 was given by him to the National Museum. 



LAMPANYCTUS CCERULEUS, (Klunzinger), Goode aud Bean. 



Scopelus coerttleun, Klt'xzixgf.k. 



Scopdus {Xutoscojjeliis) cceruhits, Li'TKEN, Spolia Athintica, 260, lig. 20. 



A species apparently closely related to L. Gemellarii, though somewhat more slender, as 

 shown in the figure of Liitken. The main point of difi'ereuce appears to be in the compar- 

 atively elongate anal fin, which contains nineteen rays instead of twelve, as in L. Oemvl- 

 larii, but the figure given by Liitken does not show an elongate anal fin. 



LAMPANYCTUS LACERTA, Goode and Bean, n. b. (Figure89.) 



Height of the body one-fifth total length (withontcaudal); length of head 3i times in total; 

 greatest depth of head two-thirds of its length. Eye moderate; its diameter contained 3^ 

 times in length of head. Snout somewhat obtuse, rounded, with strong keel; its length 

 about one-half diameter of eye. Cleft of mouth somewhat oblique, maxillary reaching to 

 angle of preoperculum and somewhat dilated. Origin of dorsal is much nearer tip of snout 

 than root of caudal. Pectoral slender, its middle rays elongate. Ventrals inserted slightly 

 behind the origin of dorsal, and reach to base of fii-st anal ray. Anal inserted behind end 

 of dorsal base. Caudal large, forked. Photophores arranged somewhat as in M. pnnctatum. 



Mediolaterals, 3; posterolateral, 1; the former in an obliquely vertical row, as in M. 

 punctatum, the latter under the soft dorsal. Precandals in low horizontal line. Number of 

 superanals 7-f 5. Three large pits in the mandibles also show luminous qualities. Color, 

 apparently light brown; the scales opalescent. 



Eadial formula: D. 13; A. 15; L. Int. about 30. 



This species is described from three specimens (No. 43778, U. S. N. M.) obtained by the 

 Albatross from station 2401, in 28° 38' 30" N. lat., 85° 52' 30" W. Ion., at a depth of 142 

 fathoms. The Albatross also obtained specimens from the following localities: No. 43779, 

 U. S. N. M., from station 2.548, in 39o 50' N. lat., 70° 14' 30" W. Ion., at a depth of 200 

 fathoms; No. 43780, U. S. N. M., a very fine specimen, 57 millimeters in length, taken at 

 the surface at station 2300, in 35° 41' 30" N. lat., 74^ 48' 30" W. Ion., in 671 fathoms; No. 

 43801, U. S. N. M., from station 2583, iu 39° 50' 45" N. lat., 71° 43' W. Ion., in 131 filth 

 oms ; and at surface, after dark, at station 2420, in 30° 01' 30" N. lat., 74° 47' 30" W. Ion. 



The Fish Hairl; obtained an individual (No. 28733, U. S. N. M.) at station 925, in 39° 

 55' N. lat., 70° 47' W. Ion., at a depth of 224 tiithoms; aud also specimens (No. 28893, U. S. 

 N. M.) from station 1020, iu 39° 50' 30" N. lat., 71° 23' W. Ion., ai a depth of 182 fathoms. 



CERATOSCOPELUS, GUnther. 

 Ceratoscopelus, Gunther, Cat. Fisb. Brit. Mus., v, IS&l, 405 and 412 (as subgenus). 



Myctophid fishes, having the dorsal aud anal fins touching the same vertical, but 

 scarcely overlapping. Scales of the lateral line somewhat enlarged. Headlong; limb of 

 preoperculum oblique; snout conical aud snake like. Orbital spines present. No luminous 

 glands on head or tail. Precaudal photophores 1. 

 19868— No. 2 6 



