OF CONCHOLOGY. 101 



tween their intersections with the costge. These intersections, 

 especially on the last whorl, appear somewhat nodulous. 



Lon. -29, lat. -13 in. Defl. 30°. 



This pretty little species belongs in the same group with 

 " mitro?norpha," aspera and filosa. The sculpture differs from 

 D. filosa, and it is larger than and differently colored from D. 

 aspera, which otherwise somewhat resembles it, but is much more 

 acuminate at both ends, and more slender. 



Habitat, Monterey, two specimens dead on beach ; Dall, 1866. 



CLATHURELLA, Cpr. 



Clathurella, Cpr. ; Maz. Cat. p. 399, 1857. 



= Defrancia Millet 1826, not of Bronn, 1825. 



{Defrancia, Bronn = Pelagia, Lamx., 1821, not of Peron & 

 Leuseur 1809, nor Quoy & Gaim., 1832.) 



The acceptation of the generic name Clathurella depends pri- 

 marily upon the stability of the genus Pelagia of Peron and 

 Leuseur. I have been recently informed that this genus was not 

 accepted by naturalists. If this be the case, Pelagia, Lamour- 

 oux, would stand, to the exclusion of Defrancia, (Bronn) which 

 would in turn supersede Clathurella, for the present genius. As 

 I have not had opportunity of verifying this information, for the 

 present I prefer to retain the term Clathurella. 



Clathurella Canfieldi, n. s. 



Shell solid, elongated, turrited, of five or six whorls ; apex 

 pointed, nucleus s-mall, hyaline, of one whorl, smooth, subse- 

 quent whorls more or less shouldered or carinated above, or 

 rounded, suture impressed rather deep. Aperture less than half 

 and more than a third as long as the shell, rather narrow ; outer 

 lip thickened, very effuse, internally ridged with from three to 

 six elevated lines terminating in tooth-like nodules. Canal 

 short, rather wide. Sinus somewhat below the suture, deep and 

 prominent with the portion between it and the suture, forming 

 a toothlike projection on the upper part of the inner lip. Colu- 

 mella smooth in the young, with from one to four crenulations 

 or nodules in the adult, near the anterior end. Upper portion 

 smooth. Sculpture consisting of revolving rounded even ridges, 

 sixteen or less on the last whorl, crossed on the upper part of 

 the whorl by numerous indistinct longitudinal plications, which 

 vanish on the lower half of the whorl. One of the revolving 

 ridges near the suture is sometimes stronger than the rest, giving 

 a carinated shouldered or tabulate appearance to the upper por- 

 tion of the whorls. Color yellowish white with three purplish 



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