EXPLANATION OF PLATES. 



PLATE 1. 



Fig. 1 . Ophioderma elapg, side view of an arm. X3. 



2. Ophioderma elaps, portion of the upper face of the disk and of an arm. X3. 



3. Ophioglypha irrorata, under face. X2. 



4. Ophioglypha irrorata, upper face. X2. 



5. Ophioglypha sarsii, young, upper face. X9. 



6. Ophioglypha sarsii, young, upper face. X5. 



7. Ophiomusium rugosum, upper face. X4. 



8. Ophiomusium rugosum, under face. X4. 



9. Ophiomusium sculptum, upper face. X6. 



PLATE 2. 



Fig. 1. Ophioderma sp., young; upper face. X4. 



2. Ophioderma Bp., young; under face. X4. 



3. Ophioglypha coronata, upper face. X4. 



4. Ophioglypha coronata, under face. X4. 



5. Ophioglypha convcxa, under face. X4. 



6. Ophioglypha convexa, upper face. X4. 



PLATE 3. 



Fig. 1. Ophiomusium armigerum, upper face. X5. 



2. Ophioglypha lepida, upper face. X3. 



3. Ophiomisidium speciosum, upper face. X7- 



4. Ophiomisidium speciosum, under face. X7. 



5. Ophioglypha elevata, under face. X6. 



6. Ophiomyces mirabilis, under face. X6. 



7. Ophiomusium testudo, upper face. XT- 



PLATE 4. 

 Fig. 1. Amphiura flcxuosa, upper face. X6. 



2. Amphiura flexuosa, under face. X6. 



3. Amphiura kinbergiensis, under face of a specimen from the Albatross. X8. 



4. Amphiura kinbergiensis, under face of a specimen from the Travailleur and the Talisman. X8. 



5. Amphiura latispina, under face. X7. 



6. Amphiura latispina, upper face. X7. 



PLATE 5. 



Fig. 1. Amphiura kinbergiensis, upper face of a specimen from the Albatross. X8. 



2. Amphiura kinbergiensis, upper face of a specimen from the Travailleur and the Talisman. X8. 



3. Amphiura complanata, upper face. X4. 



4. Amphiura complanata, under face of another specimen. X5. 



5. Amphiura complanata, upper face of the specimen illustrated in fig. 4. X5. 



6. Amphiura complanata, under face of the specimen illustrated in fig. 3. X4. 



7. Ophiocnida loveni, upper face. X". 



8. Ophiocnida loveni, under face. X7. 



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