18 



confertis reflexis pilosis lyrata : subtus convexa, umbilico magno 

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

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

 cum rcflexo. Lat. r 3 , alt. £ poll. Hab. New South Wales. 



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

 dissimilis, 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, lutco-cornea, ad apicem virens, striis incrementalibus con- 

 spicuis inequalibus, et striis minutissimis confertis volventibus 

 decussata : spira anfr. 5^ convcxiusculis ; ultimo ventricoso, prope 

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

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

 sinuato. Lat. f , 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. T 9 ff , alt. § poll. Hab. 

 Interior of Oregon. 



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

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

 most of its characters, it nearly resembles II. 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. h, alt. \± poll. Hab. Puget 

 Sound, Oregon. 



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



