■266 LACUNA. 



Var. EFFUSA, Carpenter. Fig. 56. 



Larger, more effuse, whorls more tumid with well-impressed 

 suture. Length, 17 mill. 



Var. EX^QUATA, Carpenter. Fig. 57. 



AVhorls flattened, suture scarcely impressed. Length, 12'5 mill. 



Section Epheria, Leach, 1847. 



L. vauiegata. Carp. PI. 50, fig. 58. 



Thin, expanded in front, periphery rounded or obtusely angu- 

 lated, smooth, polished, fulvous, irregularly strigate with chestnut, 

 with frequently a peripheral band of white spots, and sometimes 

 another below the suture. Length, 7*5 mill. 



Vancouver's Isl. to San Diego, Cal. 



L. BouRGUKiNATi, Rochebrune. PL 50, figs. 59, 60. 



Ventrieose, subdistorted, thick, yellowish brown, spirally lirate, 

 longitudinally striate by growth lines, umbilicated, lip rather thick. 



Length, 6 mill. 



Cape Verd Is. 



L. DivARicATA, Fab. PI. 50, figs. 61, 62, 64-73, 75. 



Obliquely conical, periphery obtusely angulated, somewhat thin, 

 translucent and glossy, with slight, numerous spiral stride; white, 

 yellowish or yellowish brown often with four brown bands of vary- 

 ing width, sometimes confluent into one band, and so disposed as to 

 exhibit a white band just below the suture. Length, 11 mill. 



Northern Europe, Iceland, Greenland, New England, N W. Coast 

 of North America. 



It will be seen from the above synonymy that the species is cir- 

 cumpolar in distribution. The banding is most cons2)icuous on 

 young specimens, but frequently it is entirely absent. 



The synonyms include L. bifasciata, L. cornea and L. striata. 

 Brown, L.fusca, Binney (fig. 64), L. vincta, Mtg. (figs. 67, 68), L. 

 solidula, Loven. (fig. 69), L. labiosa and L. albella, Loven., L. per- 

 tusa, Conr., L. borealis, Phil. (fig. 75), L. arctica, Phil. (fig. 73), 

 L. graclllor, Metcalfe (fig. 65), a narrow, elongated form, some- 

 times considered a variety, var. ecanalicalata, Jeffreys, L. canalis, 

 Mont., L. quadrifasciata, Mont. (fig. 66), and the following forms 

 from tlie West Coast of the United States : L. compacta. Carp., L. 

 ■carinata, Gould (figs. 71, 72.) 



