90 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 



BIBLIOGRAPHY. 



Adolphi, H. 



'93. Ueber Yariationen der Spinaluerven und der TVirbelsaule anurer Ani- 

 phibieu. I. Morph. Jahrb., Bd. XIX. p. 313. 



Adolphi, H. 



'95. Ueber Yariationen n. s. w. II. Morph. Jahrb., Bd. XXII. p. 419. 



Adolphi, H. 



'96. Ueber Yariationen u. s. w. III. Morph. Jahrb., Bd. XXY. p. 115. 



Bateson, W. 



•92. On Numerical Variation in Teeth, -with a Discussion of the Conception 

 of Homology. Proc. Z06I. Soe. London, 1892, p. 102. 



Baur, G. 



-91. On Intercalation of Yertebrse. Jour. Morph., Yol. IV. p. 331. 



Baur, G. 



'97. Remarks on the Question of Intercalation of Vertebrae. Zool. Bull., 



Yol. I. p. 41. 



Benham, W. 



■94. Notes on a particularly Abnormal Vertebral Column of the Bull-frog 

 (Raua mugiens) ; and ou certain other Variations in the Auuran Column. 

 Proc. Zobl. Soc. London, 1894, p. 477. 



Bolk, L. 



'94. Beziehungen zwischen Skelet, Muskulatur, und Tserven der Extrerai- 

 taten. Morph. Jahrb., Bd. XXI. p. 241. 



Bourne, A. G. 



'84. Certain Abnormalities in the Common Frog (Rana temporaria). Quart. 

 Jour. Micr. Sci., Vol. XXIV. p. S3. 



Bumpus, H. C. 



'97. A Contribution to the Study of Variation. (Skeletal Variations of Xec- 

 turus maculatus Raf.). Jour. Morph., Vol. XII. p. 455. 



Case, E. C. 



'96. Abnormal Sacrum in an Alligator. Amer. Naturalist, Vol. XXX. 



p. 232. 



Davidoff, M. von. 



'84. Ueber die Yarietaten des Plexus lumbosacralis von Salamandra macu- 

 losa. Morph. Jahrb., Bd. IX. p. 401. 



