242 LITTORINA. 



Var. PATULA, Thorpe. Figs. 98-100. 



Somewhat auriformly expanded, thinner; spire not prominent, 

 placed somewhat obliquely ; mouth wide. 



England. 



L. labiata, Brown, is a synonym. 

 Var. SAXATILIS, Johnston. Fig. 97. 



Thinner, whorls more convex, subglobose, small, tessellated with 

 olivaceous brown and white. Length, 9-12 mill. 



In deferance to European authority, I include this as a variety 

 of L. rudis, but it appears to me to be very distinct from that form, 

 whilst it" certainly shades gradually into the variety below. 



L. neglecta, Bean, is a synonym. 

 Var. TENEBROSA, Montg. Figs. 14. 



Thin, whorls rounded, with elevated spire ; brownish or yellowish ; 

 usually tessellated with white. Length, 9-12 mill. 



See remarks under foregoing variety. 



L. vestita, Say., and L. marmorata, Pfr., are synonyms. 



L. LITTORALIS, Linn. PL 41, figs. 5-8. 



Rather solid, globosely ovate, with low pointed spire, whorls not 

 very convex, suture scarcely impressed, surface smooth ; yellowish, 

 brownish, or brownish red, often with a faint, finely tessellated pat- 

 tern, sometimes spirally banded or lineated. Length, 9-12 mill. 



Lapland, Norway, Greenland, New England. 



L. littoralis has usually been considered synonymous with L. 

 obtusata, Linn., but I agree with Dr. Jeffreys in referring it to the 

 species known in America as L. palliata, Say. It does not appear 

 to occur on the British Coasts. 



L. arctica, Moll. (figs. 6, 7), L. limata, Lov6n, L. tenebrosa, var. 

 obtusata, Midd. (fig. 5), are synonyms. 



L. VENTRICOSA, Phil. PI. 41, fig. 9. 



Rounded oval, spirally engraved, sometimes granulated; whitish, 

 with pale red streaks ; columella excavated, and with aperture, flesh 

 color. Length, 18 mill. 



Pulo-Penang. 

 L. PORCATA, Phil. PL 41, fig. 10. 



Umbilicated; coarsely spirally ribbed; bluish white, the exca- 

 vated columella and interior of aperture chocolate color. 



Length, 7 mill. 



Galapagos Is. 



