HELIX §. 53. 
259 
margine columellari dilatato, appresso, excavato. — Diam. maj. 51, 
min. 38, ait. 30 mill. (Coli. Saul. et Walton.) 
Helix cognata (Helicogena) Fer, pr. 76. Hist. t. 44. f, 4. 
— - Pfr, Svmb. HI. p. 72. 
— — Chemn, ed. n. Helix N. 260. t. 43. f. 5. 6 
Habitat in insulis Anlillis? (F<5r.) 
Obs. Tria vidi specimina in collectionibus Londinensibus prorsus aequalia, 
forma ad H. asperam For. accedentia, sculptura ct apertura edentula facile 
distinguenda. 
677. H. ponderosa Pft-. 
T. imperforata, globoso-depressa, tumida, solida, ponderosa, 
laeviuscula (striis incrementi et concentricis confertissimis vix 
conspicuis), alba, basi epidermide nitida, pallide cornea induta; 
anfr, i/i convexiusculi, ultimus subangulatus, fasciis albis hyclro- 
phanis infra angulum interdum obsolete notatus; columella recta, 
lata, perobliqua; apertura subauriformis , intus alba; perist. late 
reflexum. — R. a. = 1 : 2. — Diam. maj. 46, min. 34 , ait. 27 mill. 
(CoU.Nr. 401.) 
Helix ponderom Pfr, in Proc. ZooL Soc. 1845. p. 38. 
— — Chetnii, ed. II. Helix N. 675. t. 108. f. 3. 4. 
—• .... Fa\ hist. t. 28 A. f. o. 6. 
Habitat in provincia Iloconensi insulae Luzon (Cuming). 
Obs. Foma H. latitanti similis, difTeri magnitudine, colore et sculptura 
minutissima. 
678. H. lignaria Pfir. 
T. imperforata, subgloboso-depressa, solida, laevigata, casta- 
nea, fasciis variis epidermidis liydrophanae , fusco-cinereae ob- 
ducta; spira vix elevata, oblusa; anfr. 4 J /2 vix convexiusculi, cele- 
riter accrescentes, ultimus ad peripheriam subangulatus; colu- 
mella slrictiuscula , perobliqua, lata, planata, fusca; apertura 
rotundato-lunaris, intus albida; perist. subincrassatum, brevissime 
reflexum, fusco -marginatum. — Diam. maj. 45, min. 36, ait. 
27 mill. (Mus. Cuming.) 
Helix lignaiia Pfr, in Proc. ZooL Soc. 1 846. p. 1 1 1 . 
Habitat prope Surigao insulae Mindanao. 
Obs. Differt ab H. raelanocheila Val. .spira depressa et columella obliqua, 
ab H. matrueli Sow. spira depressiore, columella non dentata, elc. 
679. H. matruelis Sowcrby. 
T. imperforata, globoso-depressa, tcnuiuscula, obli((ue striata, 
nigricans, epidermide fusco-cirierea hydrophana induta; arca co- 
lumellaris nitide lutcn, fascia nigricante circumdata; spira parunt 
17 * 
