“…It is not the purpose of this report to review this information which is available elsewhere. Particularly useful are the studies of Patten ('31,'38,'53), the classic monograph of Marshall (1850), and selected Niazi, '52; Loeffler,'48;Maxwell,Young,Rowe and Connors,'57;McLester,Bush and DuBois,'40;Niwayama,'60;Palmer,[30][31]Parsons,'50;Pedersen and Therkelsen,'54; Pfennig, '41; Potter and Ranson, '04;Marinozzi, '57;Ruge, 1891;Sawyer, Pool, Beck and Daniel, '57;Seavey and Dorney, '58;Sternberg, '13; Varcasia and Patane, '57; Vega, '56; Vineberg and Gialloreto,'56;Vossenaar,'57;William and Abrikossoff,'11). A typical example is illustrated in figure 1, and the usual anatomic features are listed in table l.…”