LITTORINA.— Plate VII. 



Species 34. (Fig. a, b, Mus. Cuming.) 

 LiTTORiNA LiTTOBALis. LM. testa semifflobosd, solidis- 

 simd, spird jilano-depreud, anfractibm oblique con- 

 vexis, leevibus aiit obscurmime slrialis ; luted, inter- 

 dum late fusco-fasclatd ; aperturd circular i, valde 

 contractd, columella late excavatd. 

 The littoral Littoeina. Shell semiglobose, very 

 solid, spire flatly depressed, whorls obliquely convex, 

 smooth, or very obscurely striated; yellow, some- 

 times broadly brown-banded ; aperture cii-cular, very 

 much contracted, columella broadly excavated. 



Nerita liltoralis, Linnseus, Syst. Nat. p. 1253. 



Turbo 1-etmus and obtusatus, Lamarck. 



Turbo ustulatus, De Blainville. 



Littorina obtusata, Menke. 

 Hab. Britain and North European shores. 



Well distinguished by its oblique obtuse growth and 

 depressed spu-e, varying in colour from yellow, more or 

 less banded, to freckled brown. 



