PELVIC ATTACHMENT IN NECTURUS MACULATUS. 377 



1. The pelvic attachment to the eighteenth vertebra on both 

 sides. 



2. The presence of a pair of rudimentary ribs upon the nine- 

 teenth vertebra, the position of the usual pelvic attachment. 



3. The presence of an incomplete haemal arch upon the 

 twenty-first vertebra. 



SMITH COLLEGE, 



December n, 1906. 



REFERENCES. 

 Bumpus, H. C. 



'97 A contribution to the study of variation. Journal of Morphology, Vol. XII., 

 No. 2. 



Parker, G. H. 



'96 Variations in the vertebral column of Necturus. Anat. Anz., Bd. XI. 



Smith, F. 



'oo Some additional Data on the Position of the Sacrum in Necturus. Amer. Nat. , 

 1900, p. 625. 



Waite, F. C. 



'97 Variations in the Brachial and Lumbo-sacral Plexuses of Necturus maculosus. 



Bull. Mus. Comp. Zool. Cambridge, Mass., Vol. 31. 

 Wilder, H. H. 



'03 The Skeletal System of Necturus Maculatus. Mem. Bost. Soc. Nat. Hist., 



Vol. 5, No. 9. 



