Bull. U. S. f 7 . C. 1 899. (To face page 492.) 
Plate XXI. 
236. New cestode from Lopholalilas chamseleonticeps, continued. Sec- 
tion of neck nearly transverse. x 70. m, Coarse longitudinal 
muscles; lt\ lateral vessels. 
237. Section showing portion of anterior disc with its acetabulum. 
X 400. 
238. Section showing structure of body wall, cu, Structureless cu- 
ticle, not stained; c/r, granular layer, n, nuclear layer; p, pa- 
renchyma, the nuclei are stained, the fibers unstained, x 700. 
239. Blastocyst, probably Rhynchobothrium speciosum from Coryphsena 
hippurus; life, x 2. 
240. a and b. Two views of larva liberated from 115. x 6. 
241. RkyncliobothHum tumidulum Linton; scolex front intestine of 
Opsanus lau; life, r, Red pigment patch, x 65. 
242. Tetrarhynehus robust ns Linton: scolex from intestine of Isurus 
dekayi; life, x 22. 
243. Tetrarhynehus bisuleatus Linton, from Decajjterus macarellus. 
Proboscis. X 700. 
244. Rhynchobothrium bulbifer Linton, from cyst in muscles of back of 
Scomber scombrus. x 15. 
