PLATE II. 



(The tigures refer to Sparus centrodontus, except where otherwise stated.) 



Fk;. 23. Portion of oviduct-wall of ovary of a tish 46 cm. long. November. 

 Enlarged. 

 24. Section of testis of fisli 4;->cm. long. November. Enlarged. 



^^- 1) )) 5 5 5> 1' If 



26. 



27. Section across the oviduct of tisli 43 cm. long. November. Enlarged. 



28. Section across the union of the oviducts. 



29. The apertures in the cloacal slit of a predominating male 4<icm. long. 

 Enlarged. 



30. Sparus cantharus, hmn. 40'5cm. long. 



31. Longitudinal section through the cloacal slit of a j)redominating male. 

 Enlarged. 



32. Section across the oviduct a little posterior to the position of Fig. 27. 

 Enlarged. 



33. Section of oviduct of predominating male 36cm. long. November. 

 Enlarged. 



34. Section of the same oviduct as Fig. 33, but close to the abdominal wall. 

 Enlarged. 



35. Oviduct of the same tish as Fig. 24, opened at its external aperture. 

 View of internal surface. Enlarged. 



36. Drawing showing dentition in lower jaw of Spams cantharus. Approxi- 

 mately natural size. 



37. Lower jaw, to show dentition. Approximately natural size. 



38. Reproductive organ, about natural size. 



39. Reproductive organ. January. Dorsal or posterior surface. 



40. Spent ovary developing, of fish 44 cm. long. November. 



41. Horizontal section of urogenital papilla of a predominating female, 

 42'5cm. November. 



42. Section at A of reproductive organ shown in Fig. 38. Enlarged. 



43. . „ B „ „ ,, „ 



44. Diagram of developing egg : pi. indicates pigment in the nucleus. En- 

 larged. 



45. Section at A of the reproductive organ shown in Fig. 40. Enlarged. 



46. ,, B ,, ,, ., 



47. „ C 



48. Section of the reproductive organ of Sparus cantharus, about the middle 

 of its length. Enlarged. 



49. Section of the reproductive organ of a fish 46 cm. long across the 

 junction of the ovaries. Enlarged. 



50. Section of the same rejiroductive organ as Fig. 49, but posterior to the 

 junction of the ovaries. Enlarged. 



51. Diagrams of early developing eggs, showing difierent sizes of nuclei. 



52. Views of concave surface of the otolith of Sparus cantharus. Nat. size. 



53. Edge view of the otolith of Sjxirus cantharus. 



54. View of convex surface of the otolith of Sparus cantharus. 

 56. Sebastes niarinus, female, 37 cm. long. Reduced. 



Figs. 57 and 58. Sebastes marinus. Solidified albuminous matter from surface 



of the wall of the ovary. Enlarged. 

 Fig. 59. Sebastes marinus, section of pregnant ovary. 



,, 60. Scale of fish 38 cm. long About natural size. 



,, 61. Sebastes jnarrnus, iO CIV.. \on^. Scale about natural size. 



