iSgi] THE BRITISH NATURALIST. 



65 



Mr. C. H. Morris sends a puzzling series of bandless Helix nemomlis, 

 all taken within two miles of Lewes, Sussex. They may be classified 

 as follows : — 



(i.) Forma nov. purpureotincta, very pale purplish, like var. pallida 

 of H. Jiortensis. 5 specimens. Allied to f. studeria. 



(2.) Forma aiirantia, CklL, orange, but not very characteristic. 

 6 specimens. Allied to f. mhella. 



(3.) Forma nov. fidvotincta, very pale fulvous or pinkish-yellow. 

 6 specimens. A pale form allied to petiveria. 



(4.) Forma olivaca, Gassies. 8 specimens. 



(5.) Forma nov. hepatica, liver-colour, suture and part of the spire 

 generally whitish. 9 specimens. Near to f. castanea. — T. D. 



A. COCKERELL. 



DESCRIPTION OF A NEW SPECIES 

 OF HELICID^. 



BY C. F. ANCEY. 



Ptychodon Magdaleno', Ancey. 



Testa orbiculato-depressa, opacula, fusca, in ultimo anfractu strigis indistinctis 

 nonnullis paulo saturatioribus variegata, umbilicata (umbilicus circularis, circa J 

 mill, latus). Anfractus 5 . regulariter lenteque crescentis, convexi, sutura impressa, 

 embryonalis 2 laevigati, ultimus rotundatus, prsecendente vix amplior, subtus depresso- 

 convexiusculus, antice non deflexus. Spira convexa, vix elevata, obtusa. Apertura 

 exigua, valde lunata, recta vel fere verticalis, lamellis obstructa, scilicet : parietalibus 

 5 (una magna, submediana, bifida et 4 minutissimis inter banc et columellam) ; sub- 

 collumellaribus 2 validis, dentiformibus, subobliquis, secunda quasi unciformi ; 

 palatalibus 7 minutis parallelis sequidistantibus. Peristomo simplex, acutum, margine 

 supero leviter antice subprovecto. 



Diam. 2, alt. vix i mill, alt. ap. f mill. 



New Zealand, probably in the Northern Island. 



This wonderful little shell, of which I have two specimens in my 

 collection, belongs to a group tl.at has been erroneously referred by 

 F. V. Hutton to the American Strobila (type : Helix labyrinthica). 

 The latter forms a quite distinct genus, hitherto not recorded noiv living 

 elsewhere but in America. I proposed the generic name Ptychodon for 

 the new Zealand Strobila leiodus, Hutton (melius : leiodon), which is a 

 patuloid shell, with a sharp peristome, and somewhat resembling 



