Heonesthes microcephalus Noman 
ITecnesthes microcephalus DCIilAH, Discovery Hep., vol.2, 1930, p.307, fig.16. 
S. 15 ° 55 ' E. 10 
o 
35 ", 600 to 700 meters. South Atlantic. 
Depth 7; head 6 1/3. Snout 7 1/4 in head from snout tip; eye 4, r.reater 
than snout; maxillary extends 1 1/5 eye diameters behind eye, length 1 1/4 in 
head from snout tip; barbel 1 l/lO to 2 1/3 vines head, hyaline stem ending in 
swollen w3 ite bulb prolonged terminally into fine filament and collar of pip- 
JL O 
mented tissue round base of bulb 
Postocular luminous organ 3 to 4 in head, with narrow subocular prolongation 
more or less covered by pigment layer. L ateral photophores 14 (?) between gill 
opening and ventral, 18 (?) between ventral and anal. Ventral series 9 or 10 
between isthmus and pectoral, 16 or 17 between pectoral and ventral, 19 or 19 
between ventral and anal, 12 (?) between anal and caudal. 
10, short, above interspace between ventral and anal; A. 22 or 23: 
pectoral rays 8; ventral rays 7, premedian. 
Traces of ventral adipose fin. (Normarw) 
South Atlantic. 
