PROFESSOR W. C. M‘INTOSH AND MR-E. E. PRINCE ON 
. 16. G. eglefinus, transverse section showing a tract, probably sensory, in the lateral region of 
the tail, . 3 : 5 c é x 230 
eli. “ transverse section near the Ge of the Sanalal Punk. ; ; x 230 
. 18. TL. gurnardus, 22 days old, bony elements in the roof of the mouth, riubebly palatine . x 120 
. 19. Clavicle of undetermined pleuronectid larva (possibly plaice), : - x 70 
, 20. LT. gurnardus, 22 days old, premaxillary (?) elements: a, anterior eee b, ene é x 120 
Puate XII. 
1. 7. gurnardus, 1st day out, June 2, 1886, . ; : : : : x about 32 
2. G. morrhua, advanced larva, May 2, 1855, : ; : : : : x 45 
3. Early larva of Motella mustela, May 8, 1886, : 5 ; : : : x 60 
4, Molva vulgaris, just hatched, 4.30 p.m., May 5, 1886, . ; : d : x 40 
5. Cyclopterus lumpus, newly-hatched, May 27, 1886, . : ‘ 7 . Magnified 
6. Larva of Pleuronectes flesus, 13 days old, April 26, 1886, . : : ; : x 50 
6a. 5, 18 days old, dorsal view. 
ie Tateral view of the larva of P. platessa, May 7, 1886, : x 40 
8. G. eglefinus, 6 days old, longitudinal vertical section through ponent aioe sinus 
venosus, and branchial arches, : : : ; : : ; x 150 
Prate XIII. 
1. Larva of Liparis montagui, March 19, 1886, ‘ 3 5 : x 24 
2. Termination of the tail in the larva of Cottus scorpius, Apne 8, 1886, . : - x 40 
3. Ovum of undetermined pleuronectid (?), with large perivitelline space. 
4. Molva vulgaris, 1st day out, May 6, 1886, : : ‘ : : x 40 
5. Centronotus gunnellus, head and anterior region, March 18, 1886, . « : ; . x about 90 
6. : * early larva, March 14, 1886, : : : 2 . Magnified 
6a.Caudal region of larval gunnel, . : ; ; : : . x about 24 
7. Centronotus gunnellus, advanced larva, May 1, 1886, : : - ‘ . x about 24 
Puate XIV. 
1. Embryo of G. eglefinus, removed from capsule, April 1, 1886, viewed somewhat obliquely, x 55 
2. Head of larva of 7. gurnardus, 3rd day, . A ; . : x 55 
3. Abnormal tail of larva of 7. gurnardus, 1st day, June ff 1886, . : 5 : x 210 
4, Anterior end of larva of Cottus scorpius (?), April 8, 1886, : 5 : : x 24 
5. P. platessa, anal region, . 4 : ‘ : x 55 
6. Cardiac region of larva from ovum mn ihe SeeeR hry space, . x 40 
7. T. gurnardus, hind end of embryo and edge of blastopore, showing the ajoining een of 
the periblast, . : 5 x 210 
8. 33 blastoderm shortly after the Gth hous the 4th iui in progress, . : x 80 
Prats XV. 
1. Molva vulgaris, subnotochordal trunks and blood-elements b/c, May 8, 1886, 5 : x 220 
2. Larva of Liparis montagui (2), showing vitelline circulation, April 12, 1886, C : x 40 
3. Aboral end of the notochord and tail of post-larval P. jlesus, : ‘ 3 : x 55 
4, Tip of the tail in the larval Motella mustela, . x 220 
5. Marginal fin and part of alimentary canal in the larva of Camrose ees July 1, 
1885 [the caudal fin in this figure has been marked ef instead of cf], . é ; x 200 
6. Cyclopterus lumpus, lateral view, 26 days old, June 17, 1885, : x 30 
7. Longitudinal section through the caudal portion of the notochord of G. rae 13th ee x 200 
8. P. jlesus, head of young specimen, May 18, 1886, : : . Magnified 
9. Cyclopterus lumpus, same age as in fig. 6, ventral view showing eins erm fins, . x 25 
