378 MONOGRAPH OF THE GENUS SCIURUS. 



tomists to decide. But I must remark, that notwithstanding 

 important zootomical examinations have been made upon the 

 Siren lacertina, the Proteus anguinus, the Siredon piscifor- 

 mis, the Menopoma Alleghaniense, and the Amphiuma me- 

 ans ; ' still, experiments directly in reference to the supposed 

 faculty possessed by these, and other species, of respiring 

 with ease both in the water and in the atmosphere, ought to 

 be carefully instituted, on several living and healthy speci- 

 mens, in various stages of their growth and age, in their na- 

 tural countries or abodes ; so that it may be ascertained with 

 certainty how far each of them is to be esteemed amphibious, 

 how necessary, or useful, the gills or branchial apparatus, and 

 the lungs individually, may prove to those kinds that are fur- 

 nished with both these organs ; and how their respiration may 

 be affected by the variations of temperature, and other atmo- 

 spheric causes. At the same time, due attention being paid 

 to any chemical changes that may take place in the water in 

 which they may be kept. Of the discoveries likely to result 

 from such investigations, we are now totally ignorant ; but I 

 feel perfectly assured that such observations would not fail to 

 afford to science many new and interesting facts, in regard to 

 the physiological relations of these, as yet, little known, and 

 most extraordinary animals. 



Temple, London ; 



February 5th, 1838. 



Art. II. — Monograph of the Genus Sciurus, with Descriptions of 

 Mew Species and their Varieties. By J. Bachman, D.D., Presi- 

 dent of the Literary and Philosophical Society, Charlestown, South 

 Carolina, &c. 



{Continued from page 337.) 



12. Large Louisiana Black Squirrel. Sciurus Audubonii. 



To the kindness of J. W. Audubon, Esq., I am indebted for a 

 specimen of another species of squirrel, of which I have seen 

 no description. His successful efforts in another department 



1 For the details of the organization of the first three animals, see Cuvi- 

 er's 'Recherches Anatomiques sur les Reptiles Douteux,' (1807) ; publish- 

 ed at p. 93, in part 2, vol. i. of ' Voyage de Humboldt et Bonpland ; also 

 MM. Configliachi et Rusconi's Monograph for the Proteus ; and Professor 

 Owen's and Mr. Hunter's papers already quoted, for the Siren, as well as 

 the two last animals. 



