4 5 6 Memoir Sears Foundation for Marine Research 



panded rearward as rounded lobes with finely but irregularly fringed edges, roofing the 

 nasal groves, concealing the upper jaw, and partially covering the lower lip when mouth 

 is closed; each lobe also with a secondary flap on inner side, similarly fringed but 



Figure io6. Aetobattis narinari. A Opened mouth (cut at corners) of male, 535 mm wide, from Rio de Janeiro, 

 Brazil (Harv. Mus. Comp. Zool., No. 389), with right-hand nasal curtain rolled forward to show nostril, tooth 

 bands, and floor and roof of mouth, about 1.2 X . 5 Upper dental plate of female (front tooth uppermost), 565 mm 

 wide, from Rio de Janeiro, Brazil (Harv. Mus. Comp. Zool., No. 865), about 1.2 X . C Lower tooth band of 

 same (front tooth lowermost), about 1.2 X . 2? Oblique side view of upper tooth band of same (front tooth upper- 

 most), about 1.8 X. E Upper teeth of embryo (front row uppermost), from Panama Bay (Harv. Mus. Comp. 

 Zool., No. 1070), about 1.8 X. F Lower teeth of same (front row lowermost), about r.8x. 



directed inward into nostril. Lower surface of subrostral fin and of anterior part of head 

 set with numerous conspicuous pores and with a complex reticular series of deep narrow 

 furrows along the midzone near the mouth, thus permitting the two lateral lobes of the 



