Bull. U. S. F. C. 1899. (To face page 492.) 
Plate XXVII. 
294. Thy sanocepJ) alum ridiculum. sp. nov. from Isurus dckat/i. Strobile. 
X 4G. a, Bothrium from another .specimen. 
295. Hook and adjacent part of bothrium. x 300. 
296. JlexacMyle thynvi De la Roche (?), from mouth of Sard a sard a. 
Ventral view. X 6. 
297. Mouth, x 300. 
298. Single sucker, x 100. 
299. 300. Miororotylc sp. from gill filaments of Pomatomus mllatri.r. 
Two individuals, alcoholic, x 12. 
301. Anterior end, ventral view, x 220. 
302. Portion of posterior part of body, ventral view, showing sucking 
discs, x 100. 
303-305. Different views of suckers, x 400. 
306. Ovum, x 240. 
307. Diphwtmnnn sp. in globular cysts in liver of Fund ulus helcroclitus; 
section of cyst and longitudinal section of parasite, x 100. 
308. Cysts in liver of jRoccus lineal us. 1. 
309. Calculus from cyst, showing concentric structure, x 300. 
