PEOr. C. STEWAllT ON A HEBMAPHEOBITE TROUT. 69 



adeonm, Delia Chiaje. 

 anmdata, Eisso. 

 barbata, Linck. 

 bicolor, Delia Chiaje. 

 bifida, Pennant. 

 coralina, Risso. 

 decacnemos, Pennant. 

 decameros, Gray. 

 Dilbeni, Bohlsclie. 

 etcropcsa, Leach. 



fimbriata, Barrelier. 



finibriata, Dujardin (mow Lamarck). 



fimbriata, Miller. 



gorgonia ?, Freminville. 



mediterranea, Lamarck. 



milleri, Miiller. 



pectinata, Linnseus {non Eetzius). 



petasus, Diiben & Koren. 



rosacea, Linck. 



On a Hermaphrodite Trout, Salmo fario. 

 By Prof. Charles Stewart, Pros. Linn. See. 



[Read 19th February, 1891.] 

 (Plate III.) 



For the opportunity of examining and describing tliis exceedingly 

 remarkable, if not unique, specimen, I am indebted to the kind- 

 ness of Mr. Thos. Andrews, of Westgate House, (xuildford, who 

 has presented it to the Museum of the Royal College of Surgeons. 



The specimen is a well-nourished example of the Common 

 Trout {Salmo fario). It is 300 millim. in length ; and I am in- 

 formed by Mr. Andrews that on two occasions ripe ova were, by 

 artificial pressure, extruded from its belly; and these eggs, 

 although kept completely isolated, on both occasions developed 

 normal young. 



The fish, when received by me, had been kept for some time in 

 strong spirits, which had made the body rigid in a bent position. 

 The abdomen also had been opened, and a partial examination 

 made. 



In the body-cavity were between two and three dozen loose 

 ova ; these had apparently escaped from a rupture in the pos- 

 terior extremity of the right genital gland (ovary), or from near 

 the posterior end of the right genital duct, which appeared to be 

 either ruptured or defective at this point. 



The genital glands were both loosely attached by a fold of 

 peritoneum, which commenced at the extreme anterior end of 

 the body-cavity, and extended along the outer borders of the 

 swimming-bladder. 



