8 



J. 



PuNCTATUs. Balaiius Punfclatus. Pull. Cat. Dorfet. p. i^3. 



Tap.. 1. F. 5, . 



B. with a very rugged brown fiiell ; compartments in- 



diftincl ; frequently punftured ; operculum of four valves, 



the upper one with a few longitudinal ridges orftria?; the 



edges of the fuperior and inferior valves clofely united at 



the top, indented or notched, and lock into each other: 



thefe are often pun6iated like a thimble : the bafe fpreads 



a very little, and is not much broader than it is high, 



which does not exceed a quarter of an inch, and ulually 



lefs. It is a very common fpecies on the South coall of 



DevonJIiire, covering whole rocks near high water mark ; 



and on the Patella, Vulgata clofely cluftered together. 



This has probably been confounded with the preceding 



fpecies, but is readily diitinguiflied by its dull brown 



colour, and rugofe appearance, and efpeciaily by the 



operculum, which is fo eflentially different. 



A variety confiderably more elevated, cylindric, and 

 with the aperture as large as the bafe is fometimes met 

 with; this has the valves of the operculum more punc- 

 tated. 



The figrre is magnified; that of the natural fize was 

 accidentally omitted. 



4. 

 RuGosus. Balanus Rugofus. Pult. Cat. Dor/ct. p. 25. 



C/iciu. Conch, viii. t. 9:. f. S24. 



B. with a fub-cylindric fliell, ufually divided into fix 

 compartments by furrows which become broad towards 



the 



