558 Bulletin ^7, United States National Museum. 



d. Snout short, sharp, not much decurved above; ej-e small, 5 in head. Scales 

 38 or 39; D. 12 or 13 (sometimes 14 or lf>); A. 14 or 15 (rarely 17 or 18); 

 anal series to 8 + 8 to 12; eye small, about 5 in head; head long, snake- 

 like, witli large mouth. crocodilus, 8:!4. 

 dd. Snout lilnnt, decurved; eye large, 3 to3t in head; scales 3'2 to 35. 



c. Scales 35; D. 13 or 14; A. 14 or 15; pectoral reacliing front of anal; no 

 luminous glands on tail. townsendi, 835. 



ee. Scales 3'2 or 33; D. 13; A. 15; anal series 7+6; pectoral reaching middle 

 of anal; tail with a luminous gland above and below. alatus, S3G. 

 cc. Mediolaterals 3; posterolaterals 2, in advance of adipose dorsal; caudal series 

 3 + 1; D. 12 or 13; A. 13 or 14. Scales '30; anal series 5+5; anterolaterals 2; 

 pectoral reaching middle of anal; snout short; eye 4 in head. (;untheri, 837. 

 hb. Caudal photophorcs 4, in a continuous, nearly horizontal row; the last not approach- 

 ing end of lateral line; mediolaterals 2; posterolaterals 2, nearly under adipose 

 dorsal; D. 12; A. 16; scales 38; anal series 7 +8; anterolaterals 3, horizontally 

 placed, not approaching end of lateral line. gemmifer, 838. 



aa. Pectorals comparatively short, slender; caudal spots 4, in a low, nearly horizontal series, 

 the last much below lateral line; 1 posterolateral below adipose dorsal. D. 12; A. 

 12 or 13. Scales 36; anal series 5 to 7 + 5. lacerta, 839. 



834. LAMPANYCTUS CROCODILUS (Risso). 



Head 3-,^,- ; depth 5f . D. 12 to 15 ; A. 14 to 18 ; P. 14 ; scales 38 or 39. Four 

 caudal spots, the last at base of middle rays; 2 posterolateral spots; anal 

 spots variable, about 6 -f 8 ; supra-auals 3, forming an obtuse-angled tri- 

 angle. Preopercle extremelj^ oblique. Body elongate, the caudal peduncle 

 stout; snout very short, pointed; mouth very large, the chin projecting; 

 eye small, 5 in head, close to the tip of snout. Dorsal high; pectoral 

 long and slender, reaching front of anal. Atlantic and Mediterranean; 

 rare; west to 33° N., 40° W. (Liitken.) (Crocorfihts, a crocodile.) (Eu.) 



Gasteropelecus crocodilus, Risso, Ichth. Nice, 357, 1810, Nice. 

 Scopelus crocodibts, LiiTKEN, Spolia Atlantica, ii, 43, 18!)2. 

 Lampanyctm crocodilus, GooDE & Bean, Oceanic Ichthyology, 79, 1895. 



835. LAMPAXTCTUS TOWNSENDI* (Eigenmann & Eigenmann). 



Head 3 to 3i; depth 4i to 5; eye large, 3^. D. 13 or 14; A. 14 or 15; 

 scales 35, those of lateral line not enlarged. Caudal spots 3, two 

 below, with a third higher up at base of caudal ; posterolateral spot 

 present; anal spots 6 -{-6 = 12; 4 between ventrals and anal. Form 

 rather elongate, the head longer than in Myctophum humhohUi, the tail 

 deeper ; preopercle about as in M. humioldti. Pectorals long and narrow, 

 reaching nearly to front of anal, 1^ in body. Oortez Banks, near San 

 Diego, in 45 fathoms. (Eigeumann.) A specimen examined by us is in 

 poor condition, but the species is certainly a valid one, and allied to 

 Lampamjctu8 alatus. (Named for Charles H. Townsend, naturalist on the 

 Albatross.) 



Mijctoplmm totnisendi, Eigenmann & Eigenmann, West American Scientist, 1889, 125, Corte' 

 Banks. (Type, No. 41921. Coll. Eigenmsinn.) 



* "Phosphorescent spots of the head as in calijoruiensc, the spots in the ventral series fewer in 

 number, 5 pairs on breast; 4 pairs between ventrals and anal; G pairs along base of anal; 6 

 pairs on caudal peduncle; 2 pairs on caudal peduncle above the spines. Spots of the sides as in 

 caJifoniieiise, with an additional spot on base of middle caudal rays, and another between the 

 last of the anal pairs and the one below the twcny-fourth scale of the lateral line." — £i</en»"w>». 



