246 
barbel l/2 (young) to 2/3 of fish, pigmented stem with white spots, oblong or 
ovate bulb bears much smaller terminal bulb; terminal part o : ' stem and bulb with 
i 
numerous unpigmented filaments; interorbital low• 
Postocular luminous organ small photophore. Lateral phot op’ ores 30 to 32 be¬ 
tween gill opening and ventral, 13 to 17 between ventral and anal; ventral 
series 8 to 10 between isthmus and pectoral, 31 to 33 between pectoral and vent¬ 
ral, 14 to 16 between ventral and anal, 15 to 17 between anal and caudal* 
* D. 14 to 17, fin height 4 4/5 in total head length; A. 23 to 26, fin height 
6; caudal 3 l/S; least depth of caudal 7 4/5; pectoral 1 2 / 5 , rays 10 and 
long filamentous ray 3 l/2 in body without caudal, with long ovate subotrminal 
bulb; ventral 5, rays 7. 
Length 322 m. without caudal* (Regan and Trewavas.) 
Atlantic, Caribbean Sea* 
Thysanactis 
1930, p 
Genus TESTS ANACT IS Regan and Trewavas 
REGAN and TREWAVAS, Danish Dana. Exped. Oceanogr. 
.57* Type Thysanactis dent ex REGAH and TREVTAVAS, 
Rep. i!o*6, I "arch 10, 
monotypic. 
Body elongate* Louth cleft straight, jaws rather strong* -both tapering to 
sharp point; tipper first moderate arid fixed, second long, depressible, followed 
by 2 or 3 outer small fixed teeth and 1 inner depi’essible tooth; small lower 
fixed tooth in front, followed by strong fixed anterior fang, next an inner 
depressible tooth and 4 to 6 smaller fixed teeth; maxillary with or without 
few erect teeth and with series of small oblique teeth; pair of teeth on vomer 
and 1 on each! palatine; 2 or 3 pairs on basibranchials; teeth ✓on gill arches 
Dorsal rays 17 or 18. Anal rays 21 to 25, origin l.vttle before dorsal 
in pairs. 
