ig. 10. 
ig. 11. 
2. Embryo of the gurnard (Trigla gurnardus), showing early optic vesicles and myotomes, 
bo 
DEVELOPMENT AND LIFE-HISTORIES OF TELEOSTEAN FISHES. 
. Salmon about a fortnight old. 
. Another example, slightly older, presenting differences in the outline of the yolk-sac and 
oil-globule. 
Salmon, 1 month old, viewed from the dorsum. 
Salmon, 5 weeks old, in profile. 
also compound vesicles anterior and posterior to Kupffer’s vesicle, 
Puate XXIIL 
. Transverse vertical section (slightly oblique) of the head of the larval Anarrhichas, January 
23, 1886, through the optic lobes, ee thalami, and anterior lobes: ov/, valve-like 
flap of the optic lobes, 
. Horizontal section through the anterior region of the same species, Mebruare 20, 1886, show- 
ing the fourth ventricle, parachordals abutting on the oral end of notochord, pronephros, 
and other parts, 
. Transverse vertical section ihrougt the fomes ae and the commencing ante Tepes the 
thalamencephalic chamber opening into the ventricle of the fore-brain beneath: lm, 
flap of mucous membrane at the side of the mouth, March 16, 1886, 
3a.Section somewhat behind the foregoing, showing the pineal gland and other parts, ) March 
4. 
D. 
6. 
bo 
16, 1886, : ; 
Transverse vertical section ieneh +e ‘ntendébali and lobi infariores’ ms, muscles ; ct, 
connective tissue, June 20, 1886, : : 
Transverse vertical section through the pineal region, showahe the pentane commissural 
bands of fibres, June 20, 1886, 
Transverse vertical (slightly oblique) section tones the ate Tebes and canted balan of 
the same form, . ; 
Transverse vertical section of tip of anor and Gncneh ihe nore pits of the ine The 
anterior epiblast is in contact with the hypoblast, 
. Caudal extremity and Kupffer’s vesicle of the embryo of Gadus Peas : 
. Embryo of Gadus wglefinus, showing neurenteric canal, 9th day after fertilisation, . 
. Larva of Solea vulgaris, posterior aspect of the globular yolk, with large vesicles in proximity 
to the mass of oil-globules beneath the trunk, 
Prats XXIV. 
. Longitudinal vertical section of the head of the larval Anarrhichas nearly in the median 
line, January 23, 1886, 
. Similar section on one side of the median line, 
Transverse vertical section of the head of the same form aural fie tori partigizendares and 
commencement of the notochord, January 16, 1886, : 
Horizontal section through the anterior end of the fore-brain, with the factor Hale 
(olb) and nerves (I.), June 20, 1886, 
. Transverse vertical section of the brain of Anarrhichas, just behind the arteries commissure, 
traces of which are still present in the section, January 16, 1886, : 
Similar section behind the former, showing the roof of the fore-brain, and the ‘psfatior 
fibres, fa, behind the optic tract, January 16, 1886, : 
Circulation of the yolk-sac in the advanced larval Anarrhichas from the nohe silly Mach 
31, 1886, 
PLATE XXV. 
Horizontal section through the heart and hyoid region of the larval Anarrhichas, March 29, 
1886: chy, ceratohyal ; hhy, hypohyal, 
945 
x 
50 
40 
40 
40 
40 
97 
97 
. Magnified 
x 135 
x 
x 
45 
45 
40 
