376 



CLARA HEPBURN. 



XVI 



None of these authors mention a case with the symmetrical 

 pelvic attachment of both sides upon the eighteenth vertebra, nor 

 one with symmetrical rudimentary ribs on any vertebra posterior 

 to the sacral connection. It is rather significant that the nine- 

 teenth vertebra, the one that in the majority of cases bears the 



sacral ribs, should, in my specimen, 

 have borne the rudimentary ones. 

 The fact that in this particular 

 case, the first entire haemal arch was 

 found on the twenty-second verte- 

 bra, is not so remarkable. F. Smith 

 records this position in sixty-two 

 cases out of two hundred and forty- 

 one. Wilder, also, states that the 

 haemal arch appears suddenly on 

 the twenty-second to the twenty- 

 fourth vertebra, usually the twenty- 

 third. He then adds that in one 

 case the vertebra just anterior to the 

 first one bearing a complete haemal 

 arch, bore upon one side a slender 

 process, four to five millimeters 

 long, evidently representing an in- 

 complete haemal arch. But whether 

 the vertebra which bore the com- 

 plete haemal arch was the twenty- 

 second, twenty-third or twenty- 

 fourth he does not say, so that one 

 cannot tell whether the vertebra 



with the incomplete haemal arch was the twenty-first, as in my 

 specimen, or one of the two next posterior. 



Although Bumpus has shown by a careful comparison that 

 the variation of the position of the first haemal arch is entirely 

 independent of that of the sacral vertebra yet the presence of 

 even a partial arch upon a vertebra anterior to any previously 

 recorded, when taken in connection with the extreme anterior 

 location of the sacral connection, appears important. 



Summarizing, then, the points of especial interest in the case 

 in question, we have the following : 



XVII 



XVIII 



XIX 



XX 



XXI 



XXII 



FIG. i. 



