PLATE I. 



{Sjjarus centrodontus, Delaioche.) 



Abnormal reproductive organ of fish 47 cm. long. 



Side view of abdominal cavity of fisli 44 cm. long. 



Fish 42 cm. long, with secondary anus. 



Reproductive organ. January. Nat. size. 



Sparus centrodontus. 



Pelagic egg {^.SjKirus centrodontus). Enlarged. 



Side view of a]>dominal cavity of fish 46 cm. long. 



Drawing of gut at secondary anus (Fig. 3). Enlarged. 



Section across reproductive organ. January. Testis nearly ripe ; ovary 



immature. 

 Reproductive organ ; testis large, ovary small. .January. Nat. size. 

 Portion of section of testis. Enlarged. 

 Cross section of a developing testis. Enlarged. 



Embryo dissected out of the pelagic ovum (cp. Figs. 5 and 13). Enlarged. 

 Pelagic egg {! Sparus centrodontus). Enlarged. 

 External view of secondary anus (cj). Figs. 3, 7, 15). 

 Sketch to show the portion of the gut i)assing through the abdominal 



wall to the secondary anus. 

 Portion of ripe testis (Fig. 9) seen from outside. Enlarged. 

 Reproductive organ ; testis and ovary equal in size. Nat. size. 

 Section aci'oss the I'eproductive organ shown in Fig. 17. 

 Abnormal reproductive organ. January. 

 Drawing of opaque yolked eggs, in swollen follicle, in developing ovary 



January. 

 Reproductive organ. January. Nat. size. 



