Figure 29. Rtija ackleyi, adult male, 410 mm long, from Yucatdn Bank (Harv. Mus. Comp. Zool., No. 748, 

 type). A Ventral view of anterior part of head. B Posterior margin of nasal curtain, about 3.4X . C Outer posterior 

 margin of nostril, about 3-4 X. D Upper teeth, near middle of mouth, about 12 X- 



