Platybot.hr ium sp.from Sphyrna zygoma. 
98. Lateral view of head, life, x 100. 
99. Spine from neck, x 750. 
Larval cestocle from Sarda sard a. 
100. Anterior end; specimen, cleared in acetic acid, showing pyri- 
form bodies, x 80. 
Larval cestodes from Pomatomus saltatrix. 
101. Section of submucosa, and mucosa of stomach, containing cysts. 
x 24. 
I>, Small blastocyst surrounded by connective tissue cyst; <7, 
larger blastocyst with cyst; /, blastocyst; h, blastocyst; k, blas- 
tocyst; n , larval Rh ynchobothrium , transverse section of nook, 
showing the four proboscides in section; ///, mucosa; s. submu- 
cosa. 
Tumor in submucosa of pylorus of Galeocerdo iigrinus. 
102. Portion of pylorus cut open longitudinally. About natural size. 
5, Tumor; d, lumen of pylorus occluded by tumor; /, lumen 
behind tumor; //// , ridges of modified mucous membrane form- 
ing a channel which leads to k, a narrow passage leading past 
the tumor. 
Cysts from stomach wall of C< ntropristrs atrari us. 
103. Cyst from submucosa of stomach. 220. 
b, Blastocyst; bv, blood vessel; d, granular coat; /, thin layer 
of connective tissue; la loose connective tissue with numerous 
nuclei; k, normal connective tissue. 
101. Section of cyst with blastocyst and larval Rhynchobothrium. 
< SO. bl, Blastocyst; bv, blood vessel; cb, proboscis-bulb; 
vy, connective tissue cyst; cm, head of larval Rhynchoboth- 
rium; pr, proboscis. 
