I,A(UINA. 267 



L. uNiFAsciATA, Carp. ri. 50, figs. 63-74. 



Small, glossy, generally with a colored keel, the band sometimes 

 broken uj> into dots. Ijength, 4 mill. 



California. 

 Var. AURANTiACA, Carp. 



Orange-white, the band and keel obsolete. 



Section Medoria (Leach), Gray, 1841. 



L. CRAssiOH, Mtg. PI. 50, fig. 76. 



Stout, solid, opaque, epidermis light yellowish ; whorls convex, 

 a little tumid or ronnd-sliouldered above, epidermis thin, often 

 gathered into obliquely longitudinal folds, under it the surface is 

 minutely spirally sti'iate ; pillar lip flattened, expanded; imperfor- 

 ate. Length, 12*5 mill. 



Northern Europe, Greenland, Sitka. 



L. (jhiciaUs, MoUer, and L. pallida, Donovan, are synonyms. 



Section Haloconcha, Dall. 1886. 



L. REFLEXA, Dall. PI. 51, fig. 80. 



Thin, light to dark chestnut brown, nearly smooth ; whorls 21-3, 

 rapidly increasing, the last somewhat slantingly flattened above, 

 inflated, suture distinct, umbilicus nari'ow. 



Length, 10, diam. lo"8 mill. 



Aleutian and Commander Is.^ Alaska. 



L. Antarctica, Martens. PI. 51, figs. 81, 82 ; PI. 46, fig. 34. 



Thin, chitinous, rather widely, excavately umbilicated, thinly, 

 subirregularly longitudinally striulate, with indistinct s})iral lines, 

 yellowish brown or chestnut color, umbilical region defined by a 

 decided angle, and depressirm, interior chestnut color, wdth a pearly 

 sheen. Diam. 6*8 mill. 



S<ndh Georgia, Kerguelen Is. 



L. pinnllio, E. A. Smith (fig. 34), is probably the young of this 

 species. 



Section Megalomphalus, Brusina. 1871. 



L. DEPRE8SA, Seguenza. PI. 51, fig. 83. 



Minute, whoi'ls rapidly enlarging, the last slantingly inflated, 

 with microscopic, close-set longitudinal folds and intermediate 

 spiral stritc, umbilicus wide, its w^all flattened, aperture obliquely 

 ovate. Length, 2 mill. 



Algiers, Messina, Brindisi; 11-108 fms. 



