norvegica,  (4)  157  ;  (6)  254,  255  ;  (7)

324  ;  (8)  330  ;  (15)  132  ;  (17)  113,  268  ;

(20)  510.
as  herring-food,  (4)  123.
O


Observations  made  at  trawling  stations
(14)  133.
on  the  life- histories  and  develop-
ment of  the  food  and  other  fishes,  (9)
14,  317.
Ociobothrium  aioso',  (19)  145.
etimarkii,  (19)  147.
harengi,  (19)  145.
lanceotatumy  (19)  145.
merlangi,  (13)  172;  (19)  146.
jxiimatnm,  (19)  149.
Mcombri,  (19)  146.
Octocoiyle  hartngi,  (19)  145.
RcomJbH,  (19)  146.
Octocoiyle  Initicaia,  (19)  146.
Octodactylus  inhcerens^  (19)  149.
Octopus  vuLgaris,  (15)  114  ;  (20)  534.
Octostoma  merlafigit  (19)  146.
Hcombri,  (19)  146.
Odostomia  acuta,  (15)  121.
cojispicua,  (15)  121.
palUda,  (15)  121.
urtbilicarufy  (15)  121.
unideiitaia,  (15)  121.
(Ediceros  iionfegicua,  (7)  320.
parvimanus,  (10)  263.
Offshore  fishing  grounds,  investigations

of,  (9)  21,  388.
waters,  spawning  of  fish  in,  (7)  183.
work,  importance  of,  (14)  8.
Oidium  morrhiuTf  (6)  205.
Oikopfeura  cophocerca,  (6)  279  ;  (15)  114.
Jlabellum,  (15)  114.
Oil-globules,    formation  of,    in  eggs  of

fishes,  (16)  97.
Oithona  sttiger,  (9)  301  ;  (20)  454.
nimilM,  (15)  148,  305,  306,  307,  308,

309,   310,  311,  315;    (16)    177,    190,

210.
apmt/rojw,  (4)  150 ;    (6)  238  ;   (20)


504

'»piu%roMrxs,  (6)  238  ;  (9)  301.
Old-wife.     See  Cantharus  lineattm,

Olsen,  Mr  O.  T.,  (8)  369 ;  (9)  177,  389.
OmmoMtrepheSf  sp.,  (3)  67.
todanu,  (6)  264.
Onchocotyle.  ajtpeiidiculata,  ( 19)  149.
Oiicidium  celticum,  (15)  117.
Oncopterinae,  (18)  360.
One-spotted  topknot.  See  Topknot,  one-
spotted.
OiikictM  arenariutf,  (10)  364.
Onoba  striata,  (15)  120.
Ono8,    See  Rocklin^.
Opah.     See  King-fisn.
Operculina  ammonoides,  (8)  317  ;  (15)
167.
incerta,  (7)  314^

Opercular  bones  of  fishes,  lines  of  growth
in,  (23)  129.
OphiactiM  ballii,  (15)  163  ;  (20)  312,  319.
Ophiocamptus  hretnpes,  (13)  249.
sarsi,  (13)  188,  244,  249.
