56 Soweiby on Helices 



AftT. VII. Descriptions, accompanied by figures of several 

 Helices, discovered by T. E. Bowdich, Esq. at Porto 

 Santo.* By G. B. So web by, F.L.S. 



1. HELIX sub-plicuta; testa longitudinaliter subplicata, sub- 

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

 turis distinctis, aperlura ampla, orbiculari, peristomate continuo, 

 paululum reflexo. Axis. If, diam. \\ unc. Tab. iii, f. 1. 



Shell nearly globose, slightly plicated longitudinally, spire rather 

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

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

 a little thickened, and scarcely reflected. 



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

 fractibus subquinis, ventricosis; suturis distinctis, depressiuculis ; 

 apertura mediocri, peristomate non continuo, 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 al] 

 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. Helix nivosa; testa subglobosa, striis longitudinalibus exili- 

 bus ornata, spira productiore, 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 any of the above described Helices there. Ed. 



