from Porto Santo, 57 



turis distinctissimis ; apertura orbiculari, peristomate continuo, 

 cxterno subreflexo, interno incrassato. Axis ■§ , diam. \ unc. Tab. 

 Hi. f. 3. 



Shell subglobose, spire rather prominent ; volutions from four to 

 five, ventricose, with numerous slender longitudinal stria? ; suture 

 very distinct; aperture orbicular, peristome continuous, the outer 

 part turned a little back, the inner thickened. Pale testaceous 

 with flakes of white. 



4. Helix nitidiuscula ; testa, subdiscoidea, exilissime longitudi- 

 naliter striata, spira, prominula, anfractibus senis, ventricosis, ni- 

 tidiusculis ; suturis distinctis : apertura sub-orbiculari, peristo- 

 mate continuo, simplice ; umbilico mediocri. Axis -f , diam. § 

 unc. Tab. iii, f. 4. 



Shell ffattish with a somewhat prominent spire consisting of six 

 volutions, which are ventricose, rather shining, and very finely 

 striated longitudinally ; suture strongly marked ; aperture nearly 

 orbicular, with a simple peristole ; umbilicus not very large. 

 Our specimen is white with 3 brown bands on the upper half of 

 the last volution. 



5. Helix Porto-sanctanw ; testa fere discoidea, umbilicata, lon- 

 gitudinaliter striata ; spira subprominula ; anfractibus quinis, 

 ventricosis ; suturis distinctis, apertura suborbiculari ; peristomate 

 continuo, reflexo, prominente. Axis |, diam. \\ unc. Tab. iii. 

 f. 5. 



Shell almost discoid, umbilicated ; spire rather prominent ; vo- 

 lutions five, ventricose, longitudinally striated ; suture distinct ; 

 aperture rather elliptical; peristome continuous, reflected, promi- 

 nent. Two varieties in colour are figured, one nearly white, with 

 very light brown bands, and the other tawny with three darker 

 bands. The animal is rather short and of a pale reddish grey 

 colour. ' , 



6. Helix Tectiformis ; testa spira. brevi, rotundata, ; anfractibus 

 subseptenis, supra leviter striatis, medio carinatis, carina deflexa ; 

 subtus umbilicata subdepressa, anfractu ultimo rotundato, granu- 

 lato ; apertura elongate, subquadrata, labio subtus expanso, re- 

 flexo. Axis ^, diam.. *| unc. Tab. iii, f. 6- 



This shell is naturally divided into two parts by the carina of 



