alt 7 
299 : 
only vestiges of the arch are ever to make their appearance. These 
observations, in view of the fact that a complete arch has been re- 
ported in both those forms, may be regarded as extending our know- 
ledge of the variability of this arch rather than throwing doubt on its 
existence as a complete vessel. 
Note. The writer regrets, that owing to the date (April 26) 
that the above communication left his hands, he could nat include a 
notice of Dr. Lewis’ paper: “The Fifth and Sixth Aortic Arches and 
the related Pharyngeal Pouches in the Rabbit and Pig”, Anat. Anz., 
19. Mai, 1906. 
References. 
Van BEmMELEn, J. F., Die Visceraltaschen und Aortenbogen bei Rep- 
tilien und Vögeln. Zool. Anz., 1886. 
—, On the Development of the Branchial Pouches and Aortic Arches 
in Marine Turtles ete. Ann. Mag. Nat. Hist. London, Vol. 12, 1893. 
—, Fig. of the Aortic Arches in Lacerta, from an unpublished drawing. 
Handb. der vergleich. und experim. Entwickelungslehre der Wirbel- 
tiere, Lief. 14/15, 1903. See also under HocHSTETTER. 
Boas, J. E., Ueber Herz und Arterienbogen bei Ceratodus und Proto- 
pterus. Morph. Jahrb., Bd. 6, 1880. 
—, Ueber den Conus arteriosus und die Arterienbogen der Amphibien. 
Morph. Jahrb., Bd. 7, 1881. 
—, Beiträge zur Angiologie der Amphibien. Ibid., Bd. 8, 1882. 
—, Ueber die Arterienbogen der Wirbeltiere. Ibid., Bd. 13, 1887. 
Hoc#sTETTER, F., Ueber Varietäten der Aortenbogen, Aortenwurzeln und 
der von ihnen entspringenden Arterien bei Reptilien. Morph. Jahrb., 
Bd. 29, 1901. 
—, Die Entwickelung des Blutgefäßsystems. Handb. der vergleich. und 
experim. Entwickelungslehre der Wirbeltiere, Lief. 14/15, 1903. 
LeHmann, Harriet, On the Embryonic History of the Aortic Arches in 
Mammals. Anat. Anz., Vol. 26, 1905. 
—, Same Title. Zool. Jahrb., Bd. 22, 1905. 
Lewis, F. T., The intra-embryonie Blood-vessels of Rabbits from eight 
and one-half to thirteen Days. Amer. Journ. Anat., Vol. 3, 1903, 
Abstract. 
—, The fifth and sixth Aortic Arches and the related Pharyngeal 
Pouches in the Rabbit and the Pig. Paper before the Amer. Assoc. 
of Anatomists, Dec. 28, 1905. 
Maurer, F., Schilddrüse, Thymus und Kiemenreste der Amphibien. 
Morph. Jahrb., Bd. 13, 1887. 
—, Die Kiemen und ihre Gefäße bei Anuren und Urodelen etc. Morph. 
Jahrb., Bd. 14, 1888. 
Prrer, Karz, Mitteilungen zur Entwickelungsgeschichte der Eidechse. 
Arch. f. mikr. Anat. u. Entwickelungsgesch., Bd. 57, 1901. 
