8 AET. S. S, TANAKA : DKSCUirTIONS OF ONE NEW 



on each side ; anterior lamina containing G or 7 rods, liighest 

 at the median (anterior) end where the cutting edge forms a 

 sharp beak-Hke cusp ; rest of the cutting edge straight though 

 sinuate; median ends of right and left anterior lamina in toucli 

 with each other at tip of the above cusp, but separate at base ; 

 Lateral lamina very low, with outer and inner cutting edges ; these 

 edges altogether separated off from edge of anterior lamina by 

 some space. Lower jaw with one mandibular lamina on each 

 side ; the lamina included within those of upper jaw ; along the 

 cutting edge there are three distinct angular prominences, of 

 which the middle lies at where the lamina is highest and the 

 anteriormost not far from the median terminal edge of the latter ; 

 the cutting edge adjoining the middle prominence on both sides 

 distinctly concave ; 6 distinct rods occur on both sides of the 

 same prominence. Dorsals 2 in number, separated from each 

 other by a space slightly less than diameter of eye ; dorsal spine 

 broken, inserted just behind anterior end of base of pectoral ; 

 first dorsal slightly emarginate, adnate to body behind last ray 

 by a long membrane, its anterior rays not reaching to origin of 

 second dorsal when folded posteriorly ; second dorsal even in 

 margin, posterior end of its base at a point half the diameter of 

 eye before origin of lower caudal lobe ; highest rays at middle of 

 its base, their length equal to diameter of eye. No anal. Pec- 

 toral large, pointed, its posterior margin nearly straight, reach- 

 ing far beyond base of ventral. Ventrals close together but 

 separate, inserted midway between anterior end of fleshy base of 

 pectoral and origin of lower caudal lobe, reaching a little beyond 

 half the distance from external end of fleshy base of ventral to 

 origin of lower caudal lobe, its posterior margin broadly rounded. 

 Lower lobe of caudal originates at a point the diameter of eye 



