MARSHALL: ADDITIONS TO 'BRITISH CONCHOLOGY.' 257 



E. philippii (distorta) var. tumidosa Marsh. This variety 

 I had originally named in MS. until the publication 

 of the 'Challenger' Report, when I recognised the E. 

 latipes of Watson, described and figured therein, as the 

 same thing, and an article on the subject appeared in the 

 ' Journal of Conchology ' for October, 1890. Since then 

 I have compared my shell with Boog AVatson's in the 

 British Museum, and in consequence have relegated my 

 specimens back to this variety, to which I consider Dr. 

 Watson's specimens may belong. They are both extreme 

 forms of that species, the Scillonian specimens being the 

 extremest of the two. The curve or dislocation of the 

 spire is a variable quantity. For further particulars see 

 'Journal of Conchology,' October, 1890. With regard to 

 the change of the well-known name distorta for philippii, 

 Dr. Watson, in the 'Challenger' Report, has followed 

 some authors in using E. philippii Weinkauff in preference 

 to E. distorta Defrance. Dr. Jeffreys and some others 

 prefer to retain it. The former considers E. distorta Defr. 

 (an Eocene fossil) to be distinct from the recent species, 

 while in the ' Lightning' Report Jeffreys says — 'Judging 

 from the description and figure of the Eocene species in 

 Deshayes' work, I should have been inclined to consider it 

 distinct from the recent species, but having lately received 

 typical specimens of the former, I have carefully compared 

 them with many hundred specimens of the latter, and I 

 feel myself conscientiously bound to unite them. Some 

 specimens of both forms have the last whorl longer in 

 proportion to the next, or else have the outer lip more or 

 less flexuous ; the degree of curvature (which is occasion- 

 ally double or flexuous) differs considerably, and the 

 periphery is now and then somewhat angulated or keeled.' 



In ' British Conchology,' however, Jeffreys had previously 

 said — ' Although all the colourless Eulimidce are much alike. 



