90 tick. 
XIV. ECHINODERMA. 
Studer (256) p. 233. 0. mixta , Luetk., with claviform spines ; 
Loriol (154) p. 414. 
Ophiomusium, Lym. ; Agassiz (3) p. 78, Bell (16) p. 115. 0. flabellum, 
Lym., and 0. pulchellum , Lym., said not to belong to Ophiomusium , 
but no name proposed ; Mortensen (197) p. 508. 0. lymani , 
W. Thoms. ; Bell (16) p. 115. 
Opkiomyxa , M. & T. ; Bell (16) p. 136. 0. brevispina , Martens, 
described ; Loriol (154) p. 425 : coloured like sponges, among 
which it lives ; Studer (256) p. 233. 0. flaccida , Say, colour ; 
Studer (256) pp. 16 '& 22. 0. serpentaria , Lym. ; Bell (16) 
p. 136. 0. vivipara , Stud., distribution ; Studer (256) pp. 164 
& 287. 
Ophionereis reticulata ; Field (82) p. 84. 
Ophiopege, n. g., for Protaster gregarius , M. & W., Keokuk Group, 
Indiana ; Boehm, Zeitschr. geol. Ges. xlv, p. 159. 
Ophiopeza fallax , see Ophiopezella lutJceni. 
Ophiopezella lutheni, pro 0. fallax , Luetken, non Peters, Amboyna ; 
Loriol, Rev. Suisse Zool. i, p. 392, n. sp. 
Ophiopholis , Lutk. ; Agassiz (3) p. 80, Fjelstrup (84) p. 28, Bell (16) 
p. 125. 0. aculcata, Linn. ; Bell (16) p. 125, Fjelstrup (84) p. 28, 
Nordgaard (201) p. 5, Petersen (216) p. 46 ; Greenland and 
Labrador, a racial var. ; Grieg (105) p. 9 : distribution ; Grieg 
(106) p. 20. 
Ophiopleura borealis , Dan. & Kor., radial shields described, distribution ; 
Grieg (106) p. 3. 
Ophioplocus irnbricatus, M. & T. ; Loriol (154) p. 398. 
Ophiopsila , Forbes, and O. anmdosa , Sars ; Bell (16) p. 130. 
Ophiopu8 , Ljuug. ; Bell (16) p. 124 : maintained as a genus; Morten- 
sen (197) p. 508. 0. arcticu8 , Ljung ; Bell (16) p. 124 : Greenland; 
Grieg (105) p. 9 : genital bursa, structure and extrusion of ova, 
distribution ; Grieg (106) p. 17 : anatomical description ; Morten- 
sen (197). 
Ophiopyrgus saccharatus t Stud., colour ; Studer (256) p. 273. 
Ophioscolex and O. glacialis ) M. & T. ; Bell (16) p. 134 : Greenland ; 
Grieg (105) p. 10 : variation in colour and size, distribution ; Grieg 
( 106) p. 27. 0. prolifer , Stud , colour ; Studer (256) p. 269. O. pur- 
purea, Dub. & Kor. ; Bell (16) p. 134 : distribution; Gri^g (106) 
p. 28. 
Ophiothamjius gracilis, Stud.; Studer (256) p. 196. O. remotus, Lym. ; 
Studer '(256) p. 55. O. vicarius, Lym., bursae discussed ; Morten- 
sen (197) p. 508. 
Ophiothrix , M. & T., described ; Bell (16) p. 130, Fjelstrup (84) p. 25. 
O. aristulata ; Studer (256) p. 54. O. comata , M. & T. ; Loriol 
( 154) p. 419. O. echinata, M. & T. ; Russo (231): spermatogenesis; 
Field (83). O.fragilis, Abildg. ; Bell (16) p. 131, Fjelstrup (84) 
p. 25, Petersen (216) p. 47, Nordgaard (201) p. 5, Russo (231) : 
spermatogenesis ; Field (83) : distribution ; Grieg (106) p. 25 : 
