229 



6) Froribp, Anatomie für Künstler. Leipzig, 1890, 



7) FüSARi, Di alcune anomalie riscontrate in un arto superiore deforme. 

 Internat. Monatsschr. f. Anat. u. Physiol., Bd. 6, 1889. 



8) Geoffeoy Saint-Hilaire, Histoire generale et particuliere des ano- 

 malies de l'organisation chez l'homme et les animaux. Paris, 1832. 



9) GuYOT-DAUBfis, Les anomalies dactyles. Revue d'Anthropol., Annee 17, 

 Paris 1888, Ser. 3. T. 3. 



JO) GuRLT, E. F., Ueber thierische Mißgeburten. Berlin, 1877. 



11) Joachimsthal. Arch. f. klin. Chir., Bd. 50, 1895. 



12) JoüON, Deformation- de l'avant-bras par arret de developpement de 

 l'extremite inf^rieure du cubitus, de cause inconnue. Revue d'Ortho- 

 pedie, Annee 16, 1905, Ser. 2, T. 6. 



13) Malewski, Un cas de manque bilateral et total du radius combine 

 avec surdite de parole. Medycyna Varsovie, T, 31, 1903. 



14) Mayer, Mitteilungen aus den Demonstrationen von Buhl. Bayer, 

 ärztl. Intelligenz blatt, Bd. 1, No. 5, Jahresber., 1870. 



15) Mies. Virchows Archiv, 1890. 



16) Otto, Monstr. sexcentor. descriptio. Breslau, 1841. 



17) RüDOLPHi, Monstrorum trium cum secondinis coalitorum disquisitio, 

 Berolini, 1829. 



18) Soubeyran, Hemimelie avec avant-bras partiel et vestiges de la main. 

 Bull, et Mem. Soc. anat. Paris, Annee 77, 1902. 



19) Taruffi, Storia della teratologia. Bologna, 1881. 



20) WiLKiE, Journ. of Anat. and Physiol., Vol. 24, 1890. 



Nachdruck verboten. 



A Double Embryo of the Florida Alligator. 



By Albert M. Reese, Syracuse University, U. S. A. 

 With one Figure. 



While collecting alligator eggs in Florida, during the summer of 

 1905, under the auspices of the Smithsonian Institution, I found the 

 double embryo that is shown in the figure. The egg from which this 

 monstrosity was taken was apparently entirely normal, both as to size 

 and general appearance. The yolk, which was single, was of the usual 

 size, and bore on the side towards one end of the egg the two closely 

 associated embryos. 



As has already been shown by Clarke (1), the alligator embryo, 

 during certain of its early stages, lies towards the end of the egg, 

 shifting its position, later, to the side of the yolk, as seen in the 

 chick's egg during the entire process of incubation. 



Although multiple embryos are not especially uncommon among 

 the lower vertebrates, this is, as far as I am aware, the only case in 



