254 EMARG1NULA. 



E. ROSEA Bell. 



Small, elevated-conical, the apex hooked a little over the posterior 

 margin ; altitude of shell less than the length of the mouth or base. 



Shell smaller and much narrower than E. fissura, and otherwise 

 distinguishable in the following particulars : it is proportionately 

 broader in front than behind, and pinched up at the sides; the 

 front is more arched or convex, and the back more concave ; the 

 longitudinal ribs are more closely set, and mostly equal-sized ; the 

 cancellation is smaller, and exhibits round holes instead of square 

 lattice-work ; the color is often pinkish ; the beak quite overhangs 

 the back margin in full-grown specimens, and it is invariably 

 longer, and greatly incurved ; the slit is much shorter ; the mouth 

 is smaller ; and the inside is frequently reddish-brown and the can- 

 celli are marked by white spots. (Jeffr.) 



Length 51, breadth 4, alt. 4 mill. 



Southern England ; Ocean Coast of France. 



E. rosea BELL, Zool. Journ. i, p. 52, t. 4, f. 1. FORBES & HAN- 

 LEY, Hist. Brit. Moll, ii, p. 479, t. 63, f. 3. JEFFREYS, Brit. 

 Conch, iii, p. 261, t. 59, f. 3. 



It is less hooked than the following, trhe mouth larger. In fact, 

 E. rosea is an intermediate between E. fissura and E. conica. 



E. CONICA Schumacher. PL 28, fig. 19. 



Small, elevated, the apex very strongly hooked over the posterior 

 margin ; coarsely latticed ; altitude about equal to the length of 

 the aperture or base. 



Surface rather coarsely latticed ; radiating ribs subequal in front, 

 alternating at the sides, about 25 to 32 in number, crossed by con- 

 centric cords about as far apart as the riblets, cutting the interstices 

 into pits and forming narrow nodes on the ribs. Aperture oval, 

 margin strongly crenulated ; slit very narrow, about one-third as 

 long as the aperture ; slit-fasciole a narrow, deep groove. Color 

 yellowish. Length of aperture 4, breadth 3} ; total alt. 31-4 mill. 



Mediterranean and Adriatic Seas. 



E. conica SCHUM., Syst. Vers. Test. p. 181, 1817 (founded on 

 Martini's figures, Conchyl. Cab. i, f. 109, 110.) E. pileolus MICH- 

 AUD, Bull. Linn. Soc. Bord. iii, 1829, p. 171, f. 23, 24. E. capuli- 

 formis PHIL., Enum. Moll. Sicil. i, p. 116, t. 7, f. 12. E. costcs 

 TIBERI, Journ. de Conchyl. vi, p. 38, t. 2, f. 5, 1857. E. curviros- 

 L ris DESK., Exped. Sci. de Moree, iii, 2d pt., p. 134. 



