263 



EDITORIAL NOTES. 



We are asked to pul)lish the following letter : — 



Nov. 1st, 1921. 

 The Editor 0^ \\\t Journal of Concliology. 

 "Sir, 



There appeared in the last number of the Joiirnal a paper by Herr Hans 

 Schlesch on the Land and Fresh-water Mollusca of East Iceland. The author 

 enumerates eight species of Pisidia, all of which he states were collected by him 

 in East Iceland, and it might be inferred from the author's reference to us that 

 we were satisfied that these eight species of Pisidia inhabit Iceland. It is true 

 that the specimens upon which the records are founded have passed through our 

 hands, but the appearance of some of them at any rate did not suggest shells 

 from a northern latitude, and it occurs to us that Herr Schlesch may have sent 

 us shells from some continental locality under the impression that they were 

 really the ones he had collected in East Iceland. We wish to make it clear, 

 therefore, that except as regards P. casertanuin, which is a well-known Icelandic 

 species, Herr Schlesch is solely responsible for the statement that these Pisidia ' 

 occur in the localities cited in his paper. 



Yours faithfully, 



A. W. Stelfox. 

 R. A. Phillips. 

 Chas. Oldham." 



Pilsbry, 'in part loi of the Manual, springs a surprise upon English con- 

 chologists by describing a new form of Pupillid from the S. of England. 



What we have been accustomed to call Vertigo minutissima, Hartmann, is 

 transferred to the genus Trimcatellina Lowe (type species linearis, Lowe from 

 Madeira), and the specific name viinutissi?na changed to cylindrica Fer., Hart- 

 mann's species being shelved as indeterminable. T. cylindrica has the aperture 

 toothless. 



The novelty is described as T. rivierana brittanica Pilsbry (we deplore the 

 spelling !), a subspecies of the Mediterranean rivierana Benson, and came from 

 Portland, Dorset, mixed with T. cylindrica (G. C. Spence). The aperture is 

 tridentate — a short tooth on the parietal wall " so deep within that it is not seen 

 in a direct face view,"' a strong, but obtuse tooth, on the columella " visible in an 

 oblique view in the aperture," and an immersed, rounded or oblong tubercle in the 

 palate. 



It may be well, also, to call attention to two other long described British forms 

 which seem to have escaped the notice of the majority of our collectors : — 



Pupa muscoriiui L. var. glis West., Nachrichtsbl., 1893, P- ^^o was described 

 from Yorkshire (Ponsonby), as "plica parietali alta elongata et in palato 

 pone marginem exteriorem dentibus duobus granuliformibus validis munita." 

 Pilsbry conjectures its identity with var. tridentata Jeffreys described in Ann. 

 and Mag. N. H. (2) xv. 22, 1855. 'Kennard and Woodward adopt the name 

 for the variety once erroneously identilied as triplicata Studer. 



I. cf/. of C. , XV, 165-6. 



