Bull., U. S. B. F. (Bull. No. 10.; 
Figure 61 .— Ictalurus punctatus, 32.6 millimeters. Specimen stained and cleared 
Figure 62.— Ictalurus punctatus , 32.6 millimeters. Dorsal view of cleared specimen 
Figure 63. — Ameiurus nebulosus, 22 millimeters 
