60 LAMELLARIA. 



Subfamily II. LamellaiHidde. 

 Genus LAMELLARIA, Montagu, 1815. 



The monographic and anatomical study of this group of shells, 

 by Bergh (Mem. Acad. Copenhagen, v, ser. iii, 1853), may be 

 consulted with advantage b}^ the student. 



L. LATENS, Miiller. PL 26, figs. 93-95, 98. 



Shell thin, white, semipellucid, smooth, shining. 



Length, 12 mill. 



Norway^ Great Britain. 



The animal has a depressed mantle, a little convex over the 

 shell , rather smooth, sparseh^ spotted with brown , densel}- radiately 

 striate below. Sigaretus StrlJviii, Sars, is a synon3'm, and I 

 think that L, tentaculata (Montagu), Forbes, and Hanley (fig. 

 98), also belongs here, as well as L. stomatella, Eisso. 



L. PERSPicuA, Linn. PI. 20, figs. 96, 97, 99. 



Shell haliotiform, polished, outer lip somewhat contracted 



above. Length, 16 mill. 



Eurojie. 



Animal lemon-colored with oval clear specks or else tessellated 

 with milk-white, or reddish brown with irregular j-ellow dots ; 

 mantle with large tubercles, each surrounded by a border of flake- 

 white, and having a small dark central speck. 



Var. LATA. Fig. 99. 



Shell smaller, broader, more compressed, but not flattened nor 

 contracted in front. This variety, says Dr. JeflTreys, may possibly 

 equal the preceding species. 



The male and female diff'er somewhat, and have been separated 

 as distinct species. The s3aionymy includes also L. ampuUacea, 

 Maravigna ; L. haliotoidea, Miiller, etc. (not Linn.) ; L. Morelli, 

 Chiaje ; L. Kindelmaniana^Mich.:, L. producta,'Le&ch.; L.com- 

 planata, Leach ; L. convexa, Bouchard ; L. Audouini^ Cantr. ; 

 L. zonifera, Bergh (fig. 99) ; L. neyntoidea, L. Adayisonii, and 

 L.Jiava, Chiaje. 



For a description of the habits of this mollusk see " Structural 

 and Systematic Conchology," ii, 208. 



