DEVELOPMENT AND LIFE-HISTORIES OF TELEOSTEAN FISHES. 



945 



CONTENTS. 



I. General Remarks, 



II. The Mature Ovum, 

 General Features, . 

 Pelagic Ova, . 

 Distribution, . 

 Dimensions of Ova, 

 The Egg-Capsule, with Remarks on the 



Reproductive Organs and Period of 



Spawning, 

 Liparis montagui, . 

 Cyclopterus lumpus, 

 Agonus cataphractus, 

 Cottus scorpius, 

 Ammodytes tobianus, 

 Gobius ruthensparri, 

 Centronotus gunnellus, 

 Blennius pholis, 

 Blenniops ascanii, . 

 Motella mustela, 

 Other species, 

 The Micropyle, 

 Deutoplasm, or Food- Yolk, 

 Oleaginous and other Globules, 

 Perivitelline Space, 



III. Extrusion and Deposition, 



Fertilisation, 

 Polar Globules, 

 Movements of the Yolk, 



IV. Segmentation, 



The Cortical Protoplasm, 

 Subgerminal Disc, 



V. The Blastoderm, . 

 The Germinal Cavity, 



VI. The Periblast, 



VII. The Embryonic Shield, 

 Epiblast, 

 Mesoblast, 

 Hypoblast, . 

 The Blastopore, . 

 Kupffer's Vesicle, 

 Neurenteric Canal, 

 Medullary Groove and Primitive 

 Streak, 



VIII. General Development of the Trunk, 

 Epiblast — Epidermal Stratum, 



„ Neurodernial Stratum, 



Notochord, ...... 



VOL. XXXV. PART III. (NO. 19). 



PAGE 







PAGE 



665 



VIII. General Development op the Trunk — 





continued. 





666 



Vertebral Column, 



. 745 



666 



Branchial System, 



. 747 



669 



Skull, .... 



. 752 



670 



Brain, .... 



. 755 



670 



Auditory Organs, 



. 760 





Olfactory Organs, 



. 762 





Optic Nerves and Vesicles, 



. 763 



671 



Cranial Nerves, 



. 768 



673 



Lateral Sense- Organs, . 



. 769 



674 



Alimentary Canal, 



. 770 



674 



„ „ , Mouth, 



. 773 



675 



„ „ , Anus, 



. 774 



675 



Liver, .... 



. 774 



676 



Swim-Bladder, 



. 774 



676 



Heart and Circulation, . 



. 775 



677 



Renal Organs, 



. 783 



677 



Integument and Embryonic 



Pigmenta- 



677 



tion, .... 



. 788 



679 



Ova and Generative Organs, 



. 793 



682 







684 



IX. The Fins — (a) Median Unpair 



ed Fins, . 795 



687 



„ „ (b) Caudal Fin, 



. 799 



688 



„ „ (c) The Paired Fin 



s, . . 800 



688 



X. Methods and Technique, 



. 803 



690 







693 



XL The Embryonic, Larval, i 



i.ND POST- 



696 



Larval Stages, 



. 806 





Triglot, gurnardus, 





. 806 



698 



Gadus morrhua, 





. 812 



698 



Gadus ceglefinus, 





. '. .822 



701 



„ virens, . 





. 823 



703 



„ merlangus, 





. 824 



709 



Molva vulgaris, 





. 827 





Motella mustela, 





. 832 



714 



Unknown Egg and Larva (f) 



, (Motella- 





like in size), 



. 835 



721 



Unknown Larva (e), 



. 835 



726 







727 



Young PLEURONECTiDiE, . 



. 835 



730 



Hippoglossoides limandoides, . 



. 835 



731 



Pleuronectes limanda, 



. 837 



732 



„ cynoglossus, 



. 839 



734 



„ platessa, 



. 840 





„ flesus,. 



. 841 



736 



Rhombus maximus, 



. 845 





„ laevis, 



. 847 



739 



Solea vulgaris, 



. 848 



739 



Zeugopterus punctatus, . 



. 852 



739 



Unknown Larval Pleuronectic 



I (A), with 



740 



oil-globule, 



. 



. 852 



7e 



