82 PECTINID.E. 



Skye ; but although evidently immature, it differs from 

 the young of the typical form in being destitute of ribs. 

 Sars, Lilljeborg, and Malm have taken this species on 

 different parts of the Scandinavian coasts from Bergen 

 southwards, and supposed it to be the Pecten subauri- 

 culata of Montagu. 



It does not appear that this or either of the other 

 species in the present section is a nest-builder. I have 

 often dredged living specimens in every stage of growth, 

 but always found them free. The shell of L. elliptica is 

 sometimes covered with Foraminifera and Polyzoa : but 

 this does not prove that they are never enclosed in cases, 

 because shells of L. hians, taken alive from their nests, 

 are often thus encrusted. 



After much consideration I am satisfied that Mon- 

 tagu's name of subauriculata ought to be assigned to 

 the following species and not to the present. His de- 

 scription and figure evidently apply to the other species, 

 which occurs in the same locality that he mentions, viz. 

 the coast of Devon. L. elliptica has not, I believe, been 

 found south of the Hebrides. Both live together in the 

 northern part of our seas, as well as on the Scandina- 

 vian coast. Their distinctive characters will be pointed 

 out after describing the next species. Forbes and 

 Hanley united the synonyms and localities for the two 

 species ; but their description appears to have been taken 

 from a specimen of L. elliptica. 



3. L. subauricula'ta *, Montagu. 



Pecten subauriculata, Mont. Test. Brit. Suppl. p. 63, t. 29. f. 2. 



Body milk-white : mantle clothed with about a dozen tubu- 

 lar clear-white tentacles of different lengths, which are closely 

 ringed and ciliated : foot white and cylindrical. 



* Slightly eared. 



