Plate XXVI. 
282 
282. Tsenia sp. continued. Section of mucous membrane of intestine 
with head of parasite, x 300. m, Lining of pit and plug 
between bothria, structureless; b, bothria covered with tine 
spines; mm, mucous membrane. 
283. Echeneibotlirium sp.’ (near E. affine Olsson) from intestine of Rhi- 
noptcra bonasus; front view of head, x 65. 
284. Lateral view of head of another specimen. > 65. 
285—287. Echeneibotlirium sp. from Myliobatis freminvillei; lateral view 
of heads of different individuals, x 65. 
288. Plan of loculi on bothrium. x 65. 
289. Calliobothriitm vcrticittatum Rudolphi, from Mustelus canis; ripe 
segment with five apertures for discharge of ova. a, Flat sur- 
face of segment; b, marginal view. 
290. Paratienia medusia Linton, from Vasyalis centrum, strobile; life. 
X 160. 
291. Posterior segments: life. 300. 
292. Phoreiobot.hrium triloculatum sp. nov. from Carcharinus obucurus; 
single bothrium, showing characteristic trilocular border, 
x 100. 
293. Acanthobothrium coronatum Rudolphi, from Raja Isevis. Lateral 
view of scolex. x 65. 
