Johnson — Axial Bifurcation in Snakes. 



525 



Table II. 



Case III. This is an Ancistrodon piscivorus Lacepede 

 [Plate XXXIV, Fig. 3], lent from the collection in the Wash- 

 ington and Jefferson University. The heads are equal in size 

 and normal in appearance except that there is an additional 

 snpralabial upon the right side of the right head. The angle of 

 the sagittal planes is 105°, that of the frontal planes about 

 150°, facing ventrally. 



Case TV. This Ophiholus getidus getulus Linn. [Plate 

 XXXIV, Pigs. 4 and 4a], is Xo. Y276 in the Smithsonian col- 

 lection. It was found by Miss Marshall at Point Tobacco, 

 Maryland, and was described in the American Xaturalist, Vol. 

 XII, p. 470, by H. C. Yarrow. The heads are equal. The 

 angle of the frontal planes is a trifle less than 90°. The verte- 

 bral column of the risrht division is in less intimate connection 

 with the common vertebral column than that of the left division. 



Case V. This specimen [Plate XXXV, Fig. 5], lent through 

 the kindness of Mr. Whiteaves by the Geological Survey of Can- 

 ada, bears this label : ''Shore of Moira Lake, near Modoc, Aug. 



