139 
visible. For form and situation of pectorals and of the eyes 
and for the transformation of lastnamed as well as for the 
reduction of the anal papilla, see the figures. Length 20 mm. 
Habitat: Near Salomakié (Dammar island), (surface plank- 
ton)!; Banda sea (750 m.)! 
Order MYCTOPHOIDEA. ’). 
Phystome. Scaly or naked. Lateral line present or absent. 
Skull with a supraoccipital generally in contact with the 
frontals, sometimes covered by the parietals. Maxillary excluded 
from the gape of the mouth by the intermaxillary. Opercles 
well developed, or their bones reduced. Anterior vertebrae not 
coossified, forming no Weberian ossicles. Pectoral arch attached 
to the skull by a forked posttemporal, no mesocoracoid. Fins 
without true spines. Ventrals abdominal, by exception thoracic. 
An adipose fin is typically present. Gillopenings very wide, 
free from isthmus. Luminous organs may be present. 
Mctitietay hey to thesgcenera, 
A, Luminous organs present. 
I, A pair of phosphorescent organs on the head, 
covered by the thin frontal bones. No eyes. No 
luminous Orcans On) body.y.5. isl-rcmstiae © choue ls Ipnops p. 179. 
IJ, Luminous organs in rows on body. Eyes present. 
a. Height I1 or more, 60 scales in lateral line, 
opetedian bones) reducedis 22 esre ec cre = Scopelosaurus p. 175. 
6. Height less than 6, 45 scales or less in lateral 
line, opercular bones well developed. 
I. Origin of anal below end of dorsal. Lumi- 
nous organs partly in groups........ Myctophum p. 151. 
2. Anal far distant from dorsal. A luminous 
organ below each of the ventral scales. . . Meoscopelus p. 173. 
4. Luminous organs absent. 
I, No scales. 
a. Origin of ventrals behind dorsal. Eye teles- 
Pages Pee ected he Co Seid, dire eye! les (ae Dissoma p. 181. 
1) Having to treat only indo-australian forms, we unite under the name Myc- 
tophoidea those fishes, which are generally arranged under the Iniomi, about 
the validity of which large group there is no concordance among ichthyologists. 
