BULLETIN OF THE UNITED STATES FISH COMMISSION. 113 



1692. LeeuwenhoeKj Anton de. < Arcana jSTaturae, 1692. 



[Leeuweuhoek describes the urinary bladder of the eel as its uterus, and 

 parasitic worms found therein as the young of the species.] 



1G97. Allen, Benjamin. On the Generation of Eels. < Pliilosopliical 

 Transactions, London, xix, 1697, pp. 664-666. 

 [Allen claimed that eels were ovo-viviparous.] 



1698. Dale, — . An account of a very large eel lately caught at Mai- 

 den, in Essex, with some considerations about the generation 

 of eels. < Philosophical Transactions, xx, 1698, i)p. 90-97. 



1712. Vallisneri, Antonio. De Ovario Anguillarum. < Ephemer. 

 Leopoldinischen Academic der Naturforscher, 1712, pj). 153-165, 

 Fig. 4. 



[Contains an announcement of a supposed discovery of the ovary of the 

 eel ; the organ described by him was a diseased and deformed swimuung- 

 bladder. ] 



1746. Arderon, Williaivi. On the Perpendicular Ascent of Eels. 



< Philosophical Transactions, London, xliv, 1746, pp. 395-396. 

 1750. Fahlbeeo, Aloot. Yon der Fortpflanzung und Vermehrung 



der Aale. <Abhaudl. Schwed. Akad., xii, 1750, pp. 199-202. 



[Not seen. Title from Syrski . ] 



1766. LiNN^us, Carolus. Muroena Anguilla. < Systema Naturae, i, 



1766 (12th ed.), p. 426. 



[Under the head of the eel, the father of modern natural history sums up 

 its life history as known to him: "Habitat in Europa, maxima in lacu 

 Comachio Ferrariensi ; uon fert Danubiam, nisi rarissime ; nocturna latet 

 in cceno duj^lici foramine, coercetur trunco albo betulpe; cutis tenacissima; 

 parit vivipara sub canicula. * * * Hybernat; noctu tenebricosa obam- 

 bulat; cadaveribus victitat."] 



1777-83. MoNDiNi, Carlo. De Anguillie Ovariis. <De Bononiensi 

 Scientiarum et Artium Instituto atque Academia Commenta- 

 rii, tom. vi, 1783, pp. 406-418. '[Bologna, 1783.] 



[Read before the Bologna Academy in 1877. After a comment upon the 

 discovery of Spallanzani, which was shown to be untenable, the supposed 

 ovary described by that investigator having been, simply a diseased swim- 

 bladder, Mondini describes the true ovary of the eel, illustrating his dis- 

 covery by excellent drawings. In the opinion of Jacoby and others this 

 was the first demonstration of the ovary of the eel.] 



1780. MuLLER, Otto Friedrich. TJnterbrochne Bemiihungen bei den 

 Intestinalwurmern. <Schrilten, Berliner Gesellsch. Naturf. 

 Freunde, i, 1780, pp. 202-218. 



[Announces the discovery of the ovary of the eels — a discovery inde- 

 pendent from that of Mondini, though made three years later. Many au- 

 thors have given the honor of discovery to Miiller, owing to the fact that 

 Mondini's paper, read to the Bologna Academy in 1777, was not published 



until 1783.] 



1783. Monte, Cajetan. De Anguillarum Ortu et Propagatione. 



< Comment. Acad. Bonon., vi, 1783, i)p. 392-405. 

 Bull. U. S. F. C, 81 8 



