630 
HOWARD. 
ABBREVIATIONS. 
ax. cyl., axis cylinder. 
bac. vir., green rod. 
cl. pig. rtn., retinal pigment cell. 
con., cone. 
con’., double cone. 
con. dst., far cone. 
con. prx., near cone. 
cp., corpuscle of fibril. 
dsc., plate. 
dsc. 1’m., intermediate plate. 
ell., ellipsoid. 
ell. bac., ellipsoid of rod. 
ell. con., ellipsoid of cone. 
ell. con. dst., ellipsoid of far cone. 
ell. con. prx., ellipsoid of near cone 
forl., fibril. 
gran. ell., granules of ellipsoid. 
gtt. ol., oil globule. 
ivly., sheath. 
ivlr. nl., nuclear sheath. 
ivlr. pa’b., sheath of paraboloid. 
ivlr. prs. dst., sheath of outer segment. 
med., axial core. 
mb. lim. ex., membrana limitans externa. 
my., myoid. 
my. bac., myoid of rod. 
my. con., myoid of cone. 
my. con. dst., myoid of far cone. 
my. con. prx., myoid of near cone. 
nl., nucleus. 
nl. bac., nucleus of rod. 
nl. con., nucleus of cone. 
nl. con’., nucleus of double cone. 
nl. con. dst., nucleus of far cone. 
nl. con. prx., nucleus of near cone. 
nil., nucleolus. 
pa’b., paraboloid. 
pa’b. bac., paraboloid of rod. 
pa’b. con., paraboloid of cone. 
pa’b. con. dst., paraboloid of far cone. 
pa’b. con. prx., paraboloid of near cone. 
pd. bac., foot of rod. 
pd. con. prx., foot of near cone. 
pd. con., foot of cone. 
pd. con’., foot of double cone. 
pd. con. dst., foot of far cone. 
pre. cl. pig., process of pigment cell. 
[VoL. XIX. 
