ART. 10 



NOTES ON MYCTOPHINE FISHES — PARR 



21 



n'. PLO alx)Ut midway between lateral line and the base of pectoral fin. 

 PVO in an approximately vertical series. VLO only moderately 

 closer to the lateral line than to the base of ventral fin, the ratio 

 between the two distances being only about 2 : 3. 



L. macdonaldi Good and Bean, 1895. 

 V*. YLO immediately below the lateral line. 



L. ater Taaning, 1928. 



L. cuprarius Taaning, 1928. 



L, lineatus Taaning, 1928. 



The inadequacy of the original figure and description (Goode and 

 Bean, 1895, fig. 110, pi. 29, and p. 94) , makes it desirable to refigure 

 and redescribe L. macdonaldi in full detail. 



Total length of type specimen exclusive of caudal fin 104 mm. 

 Proportions in per cent of the total length without caudal fin: 

 Length of head 29. Diameter of eyes 5.8. Length of lower jaw 

 23. Greatest height 17. Height of caudal peduncle 10.5. Distance 

 from snout to dorsal fin 46. Distance from snout to ventrals 43. 

 Distance from snout to anal fin 58. 



Figure 9. — Lampanyctus macdonaldi Goode and Bean. The number op separate 

 infra- and supra-caudal luminous scales can not be clearly made out in 

 the type specimen 



Snout short. Praeopercular margin strongly inclined. Ventrals 

 somewhat in advance of the origin of dorsal fin. Origin of anal 

 fin under the end of the anterior three-fourths of the base of dorsal 

 fin. The comparatively great height of the caudal peduncle is con- 

 spicuous. Pectorals rudimentary. 



PLO about midway between lateral line and base of P. PVO 

 nearl}^ vertically arranged. 5 PO^ the fourth elevated to midway 

 between the levels of lower and upper PVO. VLO about two- 

 thirds as distant from the lateral line as from the base of ventral 

 fin. 4 F<9, all on the same level. 3 SAO, broadly angulate. First 

 SAO above the interspace between second and third VO. Second 

 SAO only very slightly higher, well behind the vertical from the 

 last VO. Upper SAO close to the lateral line, on a line with the 

 second SAO which passes well behind the fourth VO. 1 antero- 

 anal organs, equally spaced in a gently convex curve, none ele- 



