Explanation of Plates and Figures. 
Text page. 
24. 24rt. Squalus acantihas Linnaeus 54 
Drawings by S. F. Denton from No. 22316, U.S.N.M., col- 
lected at Gloucester, Massachusetts, by the U. S. F. C. 
PLATE YIII. 
25. Centroscymnus ooelolepis Bocage and Capello 55 
Drawing byH. L. Todd from No. 26219, U.S.N.M., collected by 
the I'ish Haick otf Newport, Rhode Island. 
26. Centroscyllium fabricii (Reinhardt) 56 
Drawing by H. L. Todd from No. 22879, U.S.N.M., collected by 
George W. Scott at 44° 23' N., 53° 25' W., in 200 fathoms. 
27. Pristis pectinatus Linna?us 60 
Drawing by H. L. Todd from No. 30678, U.S.N.M., collected at 
Pensacola, Florida, by Silas Stearns. 
28. Rhinobatus lentiginosus Garman ^ lateral view 62 
Drawing by H. L. Todd froiu No. 30175, U.S.N.M., collected at 
Pensacola, Florida, by Silas Stearns. 
PLATE IX. 
28a, 285. Rhinobatus lentignosus Garman; dorsal and ventral 
views 62 
Drawings by H. L. Todd from No. 30175, U.S.N.M., col- 
lected at Pensacola, Florida, by Silas Stearns. 
29. Raja erinacea Mitchill 68 
Drawing by H. L. Todd from No. 10428, U.S.N.M., collected at 
Woods Hole, Massachusetts, by S. F. Baird. 
PLATE X. 
30. Raja ocellata Mitchill 68 
Drawing by H. L. Todd from No. 24228, U.S.N.M., collected at 
Provincetown, Massachusetts, by U.S.F.C. 
31. Raja ackleyi Garman 70 
Drawing by H. L. Todd from No. 2684, U.S.N.M., collected by 
the Albatross at 39° 35' N., and 70° 54' W. 
PLATE XI. 
32. Raja stellulata Jordan and Gilbert 75 
Drawing by H. L. Todd. 
33. Tetronarce occidentalis (Storer) 77 
Drawing by H. L. Todd from a specimen collected at Woods 
Hole, Massachusetts, in the summer of 1881 by the U.S.F.C. 
PLATE XII. 
34. 34«. Tetronarce californica f Ayres) 77 
Drawings by II. L. Todd from No. 27212, U.S.N.M., col- 
lected by Dr. Jordan at Soquel, California, 
