SECTION XII. 261 



dance, has very few recent fpecies yet dif- 

 covered. 



But to conclude, from v/hat has been 

 abovementioned, I (hall divide this femily 

 of Anomiae into two genera, to wit, Ge- 

 nus I. Inarticulate Anomlas, or thofe in 

 which the hinge of the under valve is a 

 large finus or cavity, the corners whereof 

 form two prominencies or joints ; and the 

 upper valve is indented into it by a corre- 

 fpondent prominency to the cavity, and hf 

 two fmall hollows, anfwerable to the tVvO 

 prominencies or jomts. Pi. VI. fig. 3. 



Genus 2. Multarticulate Anomia?, or 

 thofe whofe hinge lies on a long llreight 

 line, and is fet with many teeth, exaftly 

 like the Noah's Arks. PL VI. fig. lo* 



PI. VI. fig. 3, (hews the recent Terebra- 

 tula, which is alfo found in very great quan- 

 tities in the foffil ftate ; the fig. 3. a. fliews 

 the top of the under valve, and its perfo- 

 ration. 



S 3 PI, VI, 



