PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. [1886. 



EXPLANATION OF PLATE VI. 



Pandarua ainnatus Say 2 (page 310). 

 (Unless otherwise stated, all figures on this plate are from sand-shark specimens.) 



Fig. 1. Posterior margin of first segment, and dorsal appendages of second, third, 

 and fourth segments, enlarged 14 diameters ; from Mustelus caiiis. 



Fig. 2. Posterior sinus of fifth segment, dorsal caudal plate, and caudal stylet of 

 one side, enlarged 31 diameters ; from Mustelus cards. 



Fig. 3. Ventral view of ventral caudal plate, and caudal stylets ; the posterior mar- 

 gin of the dorsal caudal plate is also indicated ; enlarged 22 diameters. 



Fig. 4. Anterior antenna, with the adjacent sticking disk, enlarged 52 diameters. 



Fig. 5. Posterior antenna, with the adjacent sucking disk, enlarged 52 diameters. 



Fig. 6. Rostrum and jjalpi, enlarged 52 diameters. 



Fig. 7. First pair of foot jaws, enlarged 52 diameters. 



Fig. 8. Second pair of foot jaws, enlarged 22 diameters. 



