824 LARVAL CESTODE PARASITES OF FISHES— LINTON. vol.xix. 



Platk VII. 

 Tetrarhijnchus erinaceus, Benerlei. 



1. Embryo ;iitach(Ml to blastocyst, from peritoneiiiu of (hinoscionregalis. Enlarged 

 three times. 



2. lload and neck of same. Enlarged lifteen times. 



3. Portion of proboscis of same, apex. Enlarged two hundred times. 



4. Portion of proboscis of same. Enlarged four hundred times. 



5. Hooks, specimen from C. regulis, proboscides retracted. Enlarged two hundred 

 and twenty-five times. 



6. Head and neck of specimen from cyst in I'omatoinuH naltalri.r. Enlarged lifty 

 times. 



7. Portion of proboscis of same. Enlarged two hundred and twenty-five times. 



8. a and h, hooks on opposite sides of proboscis of same, drawn to same scale. 

 Enlarged tifty times. 



Tetrarhynchus elonyaius, Wagener. 



9. Part of a blastocyst from liver of Mola rotunda. Enlarged one and ouo-half 

 times. 



10. Scolex liberated from inclosing walls of blastocyst, but with slender portion 

 of blastocyst still attached. 



11. Scolex showing prolonged anterior ends of the bothria, making bookless bases 

 to the proboscides. Enlarged six times. 



12. a to g, hooks seen through walls of the proboscis-sheaths. Enlarged two hun- 

 dred and twcnty-fivo times. 



Plate VIII. 

 Tetrarhijnchus hicolor, Bartels. 



1. Scolex from Xiphias gladius. Enlarged three times. 



2. Scolex from Coryphana hippurtts. Enlarged six times. 



3. Scolex from Galeorcrdo tigrinus. Enlarged six times. 



4. Proboscis toward apex of specimen, shown in fig. 3. Enlarged two hundred and 

 twenty-five times. 



5. View of base of proboscis of specimen from Carchariniis obsctiriia. Enlarged 

 three hundred times. 



6. Same specimen view of jiroboscis near apex. Enlarged three hundred times. 



Syiiboihrium JilicoUc, Uutoii, 



7. Blastocyst from Cynoscion regalis. Enlarged one and one-half times. 



8. Anterior end of blastocyst compressed, specimen from ParalUhthys dentattts. 

 Enlarged fifteen times, life. Inked from pencil sketch by Margaret B. Linton. 



9. Portion of proboscis, specimen from Mttstelus canis. Enlarged three hundred 

 times. 



10. Portion of proboscis toward apex, specimen from Trygon centnira. Enlarged 

 three hundred times. 



11. Hooks from proboscis of specimen from Cynoscion regalis. Enlarged three 

 hundred times. 



12. Hooks from proboscis of specimen from romatomiix saltatrix — a near base, h 

 middle, c toward apex. Enlarged three hundred times. 



