144 BULLETIN 84, UNITED STATES NATIONAL MUSEUM. 



PLATE 6. 



Fig. 1. Amphiodia liitkeni, upper face. X7. 



2. Amphiodia liitkeni, under face. X7. 



3. Amphiodia nisei, under face. X7. 



4. Amphiodia erecta, upper face of smaller specimen. Xll. 



5. Amphiodia erecta, under face of the same. Xll. 



6. Amphiodia erecta, upper face of the larger specimen. X6. 



7. Amphiodia erecta, under face of the same. X6. 



PLATE 7. 



Fig. 1. Amphiura stimpsoni, upper face. Xll. 



2. Amphiura stimpsoni, under face. X14. 



3. Amphiura fibulata, upper face. X5. 



4. Amphiura fibulata, under face. X7. 



5. Amphiura fibulata, upper face of the disk of the same specimen, more enlarged. X7. 



6. Amphiura diducta, upper face. X8. 



7. Amphiura diducta, under face. X8. 



PLATE 8. 



Fig. 1. Ophiophragmus wundermani, upper face. X4. 



2. Ophiophragmus wundermani, under face. X4. 



3. Ophiacanlha bidentata, under face. X4. 



4. Ophiacantha bidentata, under face. X4. 



5. Amphiura otteri, upper face of one of Ljungman's types. X4. 



6. Amphiura otteri, under face of the same. X4. 



7. Amphiura otteri, under face of a specimen from the Albatross. X5. 



8. Amphiura otteri, under face of an arm of one of Ljungman'e typee. X5. 



9. Amphiura otteri, upper face of the same arm. X5. 



PLATE 9. 



Fig. 1. Ophiacantha mcridionalis, upper face. X6. 



2. Ophiacantha meridionalis, under face. X6. 



3. Ophiacantha pentacrinus, upper face. X10. 



4. Ophiacantha pentacrinus, under face. X10. 



5. Ophiacantha sp., allied to 0. pentacrinus; upper face. X10. 



6. Ophiacantha ep., allied to 0. pentacrinus; under face of the same specimen. X10. 



PLATE 10. 



Fig. 1. Ophiomitrella levis, under face. X10. 



2. Ophiacantha granulifera, upper face. X4. 



3. Ophiacantha granulifera, under face. X5. J 



4. Ophiomitra robusta, upper face. X4. 



5. Ophiomitra robusta, under face. X4. 



6. Ophiomitrella levis, upper face. X10. 



PLATE 11. 



Fig. 1. Ophiacantha aculeata, upper face. X4. 



2. Ophiacantha aculeata, under face. X4. 



3. Ophiacantha (Ophiapristis) permixta, upper face. X4. 



4. Ophiacantha (Ophiopristis) permixta, under face. X4.5. 



5. Ophiacantha fraterna, upper face. X4. 



6. Ophiacantha fraterna, under face. X4. 



