ORDER III. 



<[iimbAlbe0» 



II. WITHOUT A REGULAR SPIRE. 



PATELLA Limpet or Dish-Shell. 



DESCRIPTION OF PLATE XXXII. 



Drv. I. ^Fig. 4. P. testudinaria. Div. IV. — Fig. 2. P. ungariceu 



Fig. 7. P. clealandi. Div. V. — Fig. 1. P. fissura. 



DiT. Ill — Fig. 5. P. caffra. Div. VI — Fig. 3. P. equestris. 



Drv. VII — Fig. 6. P. porcellana. 



Shell univalve, siibconic, shaped like a bason, without a spire. 



THE Patellae, though a very numerous genus, present 

 but little variation in form, the species, with very few 

 exceptions, generally approximating to the shape of 

 a cone, with its apex a little blunted. The colors and 

 structure of their exterior are extremely diversified; 

 some being perfectly smooth, while others are strong- 

 ly granulated ; and many are deeply striated, or cover- 

 ed with elevated tuberculated ribs. 



The distinctions of the divisions are strongly marked : 

 the first comprises the species which have the margin 

 entire, and are not pointed at the summit. Those 



