18 



confertis reflexis pilosis lyrata : subtus convexa, umbilico magno 

 scalariformi perforata : spira anfr. 6 convexis, angustis : apertura 

 subcircularis, ad basim subangulata ; labro simplici, prope umbili- 

 cum reflexo. Lat. r \, alt. £ poll. Hab. New South Wales. 



A very beautiful shell, unlike any other described except H. 

 dissi?nilis, D'Orb., which is larger, more dotted, and is not noted 

 as hairy. In general form, striation, umbilicus, &c, it is like H. 

 striata. 



Helix pedestris. Testa rudis, depresso-globosa, late perfo- 

 rata, luteo-cornea, ad apicem virens, striis incrementalibus con- 

 spicuis inequalibus, et striis minutissimis confertis volventibus 

 decussata : spira anfr. 5J- convexiusculis ; ultimo ventricoso, prope 

 aperturam deflexo : apertura obliqua, transversa, rotundato-luna- 

 ris ; peristomate reflexo, albo, ad basim dilatato, juxta columellam 

 sinuato. Lat. £•, alt. \ poll. Hab. New South Wales. 



It has the shape and aspect of H. zaleta, but is more like H. 

 profunda inferiorly. 

 / Instead of the usual sliding motion of the Helices, the mollusk 

 ' of this shell flexes its foot into about four vertical undulations, so 

 '■ as to touch the plane of motion at as many points only ; and these 

 undulations pass from the head towards the tail, as in the motions 

 \ of a caterpillar or a millipede. 



Helix strigosa. Testa orbicularis, depressa, scabrata, late 

 umbilicata, cinereo-grisea vel fuscescente, fasciis linearibus vol- 

 ventibus pallide fuscis interdum subtus notata : spira anfr. 5 con- 

 vexiusculis ; ultimo angulato et prope aperturam deflexo : apertura 

 circularis ; labro simplici, continue Lat. -j 9 ^, alt. f poll. Hab. 

 Interior of Oregon. 



Of the shells of this continent, it may be compared with H. 

 alternata in form ; but in its opaque and rugged aspect, and in 

 most of its characters, it nearly resembles H. alpina of Europe. 



Helix sportella. Testa planulata, fragilis, nitida, luteo-cor- 

 nea, subtus concava, late umbilicata, lineis incrementi conspicuis 

 et lineis volventibus subtilissimis confertim decussata : anfr. 5, 

 ultimo magno ; sutura profunda : apertura rotundata, infra suban- 

 gulata ; labro acuto, simplici. Lat. J-, alt. \% poll. Hab. Puget 

 Sound, Oregon. 



Much like H. concava, but has a smaller umbilicus, and larger 



