FISHERY BULLETIN': VOL. 70, NO. I 



infracaudal gland to end of base of anal fin. 

 Sizes of specimens are given in standard lengths 

 (SL) only. 



Terminology of body photophores follows that 

 of Bolin (1939). Unless otherwise specified, 

 the term photophore refers to the primary body 

 l^hotophore. 



Otoliths were measured with an eyepiece mi- 

 crometer as follows: Length (OL)— the great- 

 est length parallel to the sulcus; height (OH) — 

 greatest height iierpendicular to the sulcus. Fol- 

 lowing measurements, otoliths were lightly 



smeared with graphite to bring out detail and 

 then photographed. Otolith terminology fol- 

 lows that of Frizzell and Dante (1965). 



Female specimens were considered gravid 

 when eggs included oil globules and completely 

 filled the oviduct. 



Most specimens examined were captured with 

 open nets and depth sampled is here considered 

 as the maximum depth reached l\v the net 

 (appendix). 



Counts of procurrent caudal rays are given 

 as dorsal + ventral. 



KEY TO THE SPECIES 

 OF THE GENUS Taatihigichthys 



la. VO 8-10; AO 5-7 + 4-6, total 9-13; Pol directly below or anterior to base of adipose 

 fin; Prci-Prc2 interspace equal to or greater than two photophore diameters; as 



many as five pairs of broad-based, hooklike teeth on dentary near symphysis 



T. minimus (Taning, 1928) 



lb. VO, if present, 3-5; AO, if present, 1-4 + 1-2, total 2-5; Pol, if present, clearly behind 

 base of adipose fin; Prci-Prc2, if present, interspace equal to, or less than, one 

 photophore diameter; no broad-based, hooklike teeth on dentary near sympiiysis 

 2 



2a. Photophores present as in lb above; anal-infracaudal distance half as long as length of 



infracaudal gland, or longer T. hathyphilns (Taning, 1928) 



2b. Photophores absent; anal-infracaudal distance less than half length of infracaudal 



gland T. j)au)'olychnus n. sp. 



' /y. 





■^^:.- 



.iAS 



W^^;- 



Figure 1. — Taaningichthys minimus (Taning) ; 46 mm, Ocean Acre stn. 7-21. 



68 



