4 Mr. Adams'j- Defer iptions of 



nitidijima. z. H. tefta duobus anfradibus, fubtiliffime tranfversc 

 ftriata. 



Tab. l.fg. 22, 23, 24. 



Obf Corneous, pellucid, umbilicated; eafily diftin- 

 guilhed by the uncommon brilliancy of its glofli- 

 nefs. 



bkolor. 3. H. tefta, laevi duobus anfra£tibus,vix umbilicata. 



Tab. I. fig. 25, 26, 37. 



Tenbigh. 



Obf. This fpecies differs from the preceding, to which 

 it is nearly allied in other refpeils, in being perfedlly 

 fmooth, devoid entirely of any gloffinefs, and in 

 having the infide of the fhell white. 



SERPULA. 



ovalis, I. S. tefta fubovali imperforate. 



Tab. I. fig. 28, 29, 30. 

 Tenbigh, common. 



Obf. This fpecies agrees nearly with y%. i. //. 1. 

 Walkers Mi?iute Shells^ but differs evidently in never 

 being perforated. 



reflexa. 2. S. tefta regular! rotunda, apertura margtni refiexa. 

 Tab. 1. fig. 31, 32. 



Sand at the WaCh. 



Obf. Gloffy, white, perforated ; aperture above the 



plane of the fpire. 



cornea. 



