422 BULLETIN OF THE BUREAU OF FISHERIES. 



Scolex polymorphus Rudolphi. 



Fig. 70. — From alimentary canal of toad-fish [Opsanus tav). Life; X HO. This suggests the genus 

 Calliobothrium. 



Fig. 77. — Same, more highly magnified. X 315. 



Fig. 78. — Specimen showing different states of contraction, o, View of entire specimen; 6 and e, poste- 

 rior end of same. The numerals 1, 2, and 3 refer to identical parts in the several sketches. 

 Actual length of a about 0.38 mm. 



Fi<;. 79. — One larger, many small specimens from .flounder ( Paralichthys albiguttus) in place on intestine. 

 Life; X 72. 



PLATE XII. 



Fig. SO. — Calliobothrium (?) sp. from the sharp-nosed shark [Scoliodon terrx-novx). Young scolex with 



rudiments of hooks. Life; X 135. 

 Fig. 81. — Blastocyst from body cavity of blue-fish [Pomatomus saltalrix). Anterior end, life. The 



length of the entire specimen was 12 nun and its breadth 2 nun. 1. Anterior end, tip everted. 



2. S;iine, retracted. 3. Anterior tip showing characteristic knobbed bristles. 



Larval cestodes. 



Fm. 82. Echeneibothrium sp. Immature scolex from sting ray (Dasyatis say). Life; actual length of 



head about 0.5 mm; length of specimen 5 mm. 

 Fig. 83. — Specimen from croaker {Micropogon undulatus). Life; actual length 5 mm. 

 Fig. 83a. — Another from same host, different elate. Length 7 mm. 

 I'm. S4. — Cyst with blastocyst from body cavity of toad-fish (Opsanus Inn). Actual length of cyst 



1.35 mm. 



Txnia sp. from body cavity of rock-fish ( Fandulus majalis). 



Fig. 85. — Scolex with rostellum retracted. Life; actual diameter through suckers 0.9 mm. 

 Fig. 86. — Hook of same. Actual length 0.22 mm. 



Rhynchobothrium sp. encysted. 



Fig. S7. — Cyst with blastocyst and larva from mesentery of croaker ( Micropogon undulatus). Life; X 50. 

 Fig. 88. — Same, larva everted, but still attached to the blastocyst. X 50. 



PLATE XIII. 

 Rhynchobothrium sp. 



Fig. SO. — Same as No. SS, larva compressed and proboscides everted. X 80. This type was found 

 many times during the season and in several species of fish. 



Fig. 90. Portion of proboscis of same. ■ 315. 



I.,,; <ii. — Portion of proboscis near apex. Specimen collected from same host ( Micropogon undulatus I, 

 but on different date. X 315. 



Fig. 92.- -Proboscis of same as No. 91 toward base. X 315. 



Fio. 93.— Cyst of probably same species from silver perch ( Bairdietto chrysura), compressed and show- 

 ing blastocyst ami contained larva. X 20. 



Fto. 94. — Portion of proboscis of specimen from black sea bass ( Centropristes slriatus). X 540. 



Fig. 95. — Cyst with blastocyst and larva from stomach wall of flounder [Paralichthys albiguttus). 

 Actual length, 2.4S mm. 



Flo. 96.— Larva removed from cyst, Fig. 95. Actual length, 1.1 mm. 



Fig. 97.— Cyst with blastocyst and larva from silver perch (Bairdiella chrysura). X 20. Type with 

 neck and proboscides rather long and hooks short and close together. 



Fm. 98. — Proboscides of specimen of Rhynchobothrium, probably same species as Fig. 97, from mesentery 

 of hog-fish (Orthopristis chrysopterus). ■ 540. 



Fig. 99. — Cyst with blastocyst and larva from big-eyed herring (Elops saurus). Actual length of 

 cyst, •"> mm. 



Fig. 100. — Portion of proboscis of same. X 540. 



