136 ME J. T. CUNNINGHAM ON THE EGGS AND LARV^I, ETC. 



Fig. 8. Ovum of PL cynoglossus, 2 hours after fertilisation. Mag. 33 times. 

 Fig. 9. PI. cynoglossus, unfertilised, 6 hours after shedding. Mag. 33 times. 



Plate IV. 



Fig. 1. Blastoderm of PL cynoglossus in process of first division, 3| hours after fertilisation. Zeiss 



CC, Oc 3. 

 Fig. 2. PI. cynoglossus, | hour after fertilisation, ovum treated with acetic acid and methyl green, and 



examined entire in glycerine ; optical section of hlastodisc ; shows male and female pronuclei. 



Zeiss CC, Oc 3, camera. 

 Fig. 3. Blastoderm of PI. cynoglossus, immediately after first division : shows nucleus in each of the two 



cells. Acetic acid and methyl green. Zeiss Cc, Cc 2, without camera. 

 Fig. 4. PL cynoglossus, 4-cell stage, 4 hours. Mag. 33 times. 

 Fig. 5. Optical section of 4-cell blastoderm, acetic acid and methyl green : shows absence of periblast 



beneath blastoderm. Zeiss CC, Oc 2. 

 Fig. 6. PL cynoglossus 8-cell stage dividing; acetic acid only without glycerine, 6 hours after fertilisation. 



Mag. 33 times. 

 Fig. 7. PL cynoglossus, blastoderm commencing to spread, 24 hours. Mag. 33 times. 

 Fig. 8. PL cynoglossus, segmentation cavity, 1 day 5 hours. Mag. 33 times. 

 Fig. 9. PL cynoglossus, 1 day 8 hours. Mag. 33 times. 

 Fig. 10. PL cynoglossus, 1 day 23| hours. Mag. 33 times. 

 Fig. 11. PI. cynoglossus, 2 days 4 hours. Mag. 33 times. 

 Fig. 12. PL cynoglossus, 2 days 19 hours. Mag. 33 times. 



Plate V. 



Fig. 1. PL cynoglossus, 2 days 19 hours. Mag. 33 times. 



Fig. 2. PL cynoglossus, 3 days 1J hour. Mag. 33 times. 



Fig. 3. PL cynoglossus, 4 days. Mag. 33 times. 



Fig. 4. Newly hatched larva of PL cynoglossus, 5 days. Mag. 33 times. 



Fig. 4a. Notochord of PL cynoglossus. 



Fig. 5. Condition of rectum, r, and coalesced ends of segmental ducts, s.cl., in newly-hatched larva. Zeiss 



CC, Oc 2. 

 Fig. 6. Condition of same parts, 30 hours after hatching. 

 Fig. 7. Larva of PL cynoglossus, 2 days after hatching. 



Plate VI. 



Fig. 1. Gci'lus ccglefinns, L., newly hatched. Mag. 33 times. 



Fig. 2. Adhesive ovum from shore near station, probably Coitus scorpini. Mag. 33 times. 



Fig. 3. Adhesive ovum attached to Hijdrallmannia falcata, perhaps Liparis Montagui. Mag. 33 times. 



Fig. 4. Young fish, 2 days after hatching. Hatched from adhesive ova taken in trawl April 29, 1884. 



Liparis Montagu!. 

 Fig. 5. Ovum of Cyclopterus lumpus. Mag. 33 times. 



Plate VII. 



Fig. 1. Newly hatched larva of Cyclopterus lumpus, ventral surface, from specimen preserved in spirit. 



Mag. '•'>'■) times. 

 Fig. 2. Pelagic ovum taken 10 miles E.S.E. of May Island, March 23, 1886. Mag. 33 times. 

 Fig. 3. Pelagic ovum taken in Firth of Forth, off Gullane Ness, May 27, 1886. Mag. 33 times. 

 Fig. 4. Larva newly hatched from ovum shown in previous figure. Mag. 33 times. 

 Fig. 4a. Notochord of same. Zeiss CC, Oc 3. 



Fig. 5. Pelagic ovum taken off Gullane Ness, May 27, 1886. Mag. 33 times. 

 Fig. 6. Larva newly hatched from same. Mag. 33 times. 

 Fig. 7. Teleostean ova from Gulf of Guinea. Mag. 18 times. Species unknown. 



