LAMPROGRAMMUS. iLy(3s 
LAMPROGRAMMUS. 
Lamprogrammus Alcock, 1891, Ann. Mag., VIIL., 34. 
Outlines resembling those of other Brotuloids. Head and body greatly 
compressed, the latter tapering to very slender backward ; body cavity less 
than one half of the total length. Skull narrow, deep, convex on the top ; 
snout broad, blunt. Mouth large, somewhat oblique, lower jaw little longer. 
Teeth in villiform bands on jaws, vomer, and palatines. Nostrils small ; 
posterior near the front edge of the upper half of the eye and anterior 
directly forward near the end of the snout. No barbels: Four gills, a slit 
behind the fourth; laminz short; gill rakers well developed; gill openings 
wide, membranes not united, free from the isthmus. No pseudobranchiez. 
Bones of the skull thin with prominent ridges separating the wide and deep 
muciparous channels. Opercular spine weak; a much weaker and blunter 
one on the lower edge of the preopercle. Vertical fins continuous ; dorsal 
origin near the head on the nape. Pectorals small, simple. No ventrals. 
Vent remote from the pectorals. Pyloric appendages few and short. Head 
and body covered with small, thin, deciduous scales, those protecting the 
lateral system rather smaller. Lateral line wide, covered by the skin and 
scales, probably luminous. Disks of the lateral system vertically elongate, 
each resting on a large scale that is wider than long. 
The figures and description of Lamprogrammus niger, published by Alcock, 
and copied by Goode and Bean, give a very imperfect idea of the lateral 
system as it appears on the species described below. They show the line 
organs as they would appear on the flanks after the removal of the outer 
scales and skin, if the intermediate scales and spaces of the series and the 
longitudinal white line connecting one gland with another were omitted. 
The arrangement of the system on the head is described below and is figured 
on Plates XXXIV. and LXXXI., fig. 1. Of the three known species of the 
genus two were taken by the “ Investigator,” one of them in the Andaman 
Sea the other in the Bay of Bengal ; the third is first made known by the 
present “ Albatross” collection and was taken in the Gulf of Panama. All 
were secured at depths between 400 and 700 fathoms. 
