OF CONCHOLOGY. 147 



which is crossed, or intersects each 



other at acute angles. 

 Dentile, a small tooth, such as the 



tooth of a saw. 

 Denticulated, set with small teeth, as 



in the Area. 

 Depressed, pressed down, low, shal- 

 low, flat. 

 Dexter valve, is the right valve. 

 Diagonal, a line from angle to angle. 

 Diaphanous, transparent, clear, pel- 

 lucid. 

 Digitated, fingered or clawed, as in 



the lobes of the outer lip of the 



Strombi, &c. 

 Disk, the middle part of the valves or 



that which lies between the umbo 



and the margin. 

 Divaricated, straddling, spreading out 



widely. 

 Divergent, tending to various parts, 



from one point. 

 Dorsum, the back, it generally means 



the upper surface of the body of the 



