56 Sowerby on Helices 



Art. VII. Descriptions, accompanied hi/ figures of several 

 Helices, discovered by T. E. Rowdich, Esq. ul Porto 

 Santo,* By G. B. Sowerby, F.L.S. 



1. 'H.'EJAX. sub'plicata ; testa longitudinaliter subplicata, sub- 

 globosa, anfractibus tribus, ventricosis, superioribus minimis, su- 

 turis distinctis, aperlura ampla, orbiculari, peristomate continuo, 

 paululum reflexo. Axis. 1|, diam. 1^ unc. Tab. iii, f. 1. 



Shell nearly globose, slightly plicated longitudinally, spire rather 

 prominent ; volutions three, rentricose, increasing rapidly in size ; 

 sutures distinct ; aperture large, orbicular, lip continued all round, 

 a little thickened, and scarcely reflected. 



2. Helix punctuluta: testa subglobosa, spira breviuscula, an- 

 fractibus subquinis, ventricosis ; suturis distinctis, depressiuculis ; 

 apertura mediocri, peristomate non continue, basi reflexo, umbi- 

 licum minimum fere tegente ; superficie punctulis minutissimis 

 confertis aspersa. Axis |, diam. | unc. Tab. iii. f. 2. 



Shell nearly globose, with a short spire ; volutions from four to 

 five, ventricose; suture distinct, rather depressed, forming an in- 

 distinct shoulder at the upper part of the volutions ; aperture mid- 

 dling, peristome not continued all round, its lower part reflected 

 and nearly covering the very small umbilicus. Shell covered all 

 over with very minute, closely set, raised dots. Colour dull chest- 

 nut, the lower part of the last volution and a nearly central band of 

 a brownish yellow. 



3. Ilclix nivosa; testa subglobosa, striis longitudinalibus cxili- 

 bus ornata, spira productlore, anfractibus quinis, ventricosis, su- 



•* In offering to our readers these descriptions and figures, we beg not to be 

 understood as pledging ourselves for the fact of their being all hitherto unde- 

 scribed. Mr. Bowdich considers them as new : we believe he is correct; and 

 they appear to us interesting, we have therefore to express our thanks to 

 Mr- Bowdich that he has permitted us to make use of them ; and also for allow- 

 ing us to make extracts from his manuscript entitled " Excursions in Madeira 

 and Porto Santo," in our possession. We have examined De Ferussac's mag- 

 nificent work " Des Mollusques terrestres et fluviatiles," and we certainly do 

 not find engravings of anyof tiie above described IIelicc!> there, Ed. 



