362 Mr. E. A. Saiitli on the Gemrx 



but, being thinner shells, tliey have the appearance of cracks 

 rather than varices. 



The general form of the shells and the spiral liration or 

 carination, and also the coloration, show relationship with 

 Tiirntilla rather than with Epitonittm, and the only conclio- 

 loo-ical difference occurs in respect of the aperture. In 

 Efflisia tiie peristome is distinctly continuous, as in E, spi- 

 raia and tn'carinnta, or the columella is joined to the outer 

 lip by a thin callus as in lanceolata and elegans. Tiie arched 

 columella also is thickened and reflexed. 



In Turritella the columella is thin find usually separated 

 from the end of the outer lip. Occasionally, however, a thin 

 connecting callus is present in some species. 



Another feature common to all the Eglisias is the base of 

 the body-whorl being marked off by a keel and the very fine 

 sculpture upon it, of quite a different character from that on 

 the rest of the shell. 



I am now able, through the kindness of Mr. J. R. Le B. 

 Tomlin, who possesses a specimen of E. spirata with the 

 operculum in situ, to describe that feature. 



It is horny, roundly ovate, almost black, and consists of 

 about 3-4 not clearly defined, very rapidly increasing whorls, 

 the pit-like nucleus Ijeing markedly excentric. It is slightly 



Fiff. 1. 



concave externally and sculptured with well-marked very 

 arcuate lines of growth. Jn fact, it closely resembles the 

 opercula of Epitonium and Mesalia, both of which are 

 paucispiral, and not muliispiral as in Turritella*. 



Eglisia spirata (Sowerby). 



1825. TurriteUa spirata, Sowerby, Cat. Tankerville, Appendix, p. xiv. 

 1849. E'jUsia spirata: Keeve, Conch. Icon. vol. v. pi. i. tig. 1. 

 1852. Ecjiesia (sic) spirata : Sowerby, Conch. Man. p. 387, pi. xxviii. 

 liff. 592. 



* Since the above was iii type, I have heard from Professor H. M. 

 Gwatkin that, judging from the radula, " Eglisia spirata is a clear 

 Scalaria." 



