HELIX. 



Plate LXXIII. 



Species 374. (Mus. Cuming.) 



Helix gemina. Eel. testa angusli mnbilicatd, depresso- 

 turlinatd, ohsoUte angulata, s/rii-n concentricis et obli- 

 quis irregulariter viaUeato-decmsatd, hUescente-albd, 

 7-ufeacenie-bruinieo hie bi/asciatd ; anfractibus scjc, vix 

 convexiusculk ; aperturd lunato-ovali ; perinlomafe 

 dmplici, superne injlexo. 



The twin Helix. Shell narrowly lunbilicatcd, dcprcssly- 

 turbinated, obsoletely angled, irregularly faintly mal- 

 leately decussated with concentric and oblique striae, 

 yellowish-white, broadly two-banded with reddish- 

 brown ; wliorls six, sliijhtly convex ; aperture lunar- 

 oval ; lip simple, inflected at the upper part. 



Buscii, Philippi, Abbild. and Besch. Conch, vol. i. p. n. 

 pi. 1. f. 1. 



llab. Java? 



Of the two bands nith which this shell is encircled, one 

 is above the periphery, and the other is below it. 



Species 375. (Mus. Cuming.) 



Helix densa. Hel. testa nmbilicatd, subdmoided, deiisd, 

 obtuse carinatd, superne depressiusculd, oblique plicato- 

 striata, tmdique eximie malleato-decussald ; fidvesceiite, 

 infra carinam fascia lata castaned ciraimdatd ; aiifrac- 

 t'd)us quinque ; aperturd transverse lunatd, intus alia ; 

 peristomate simplici, intus subincrassato. 



The thick Helix. Shell umbilicated, subdiscoid, thick, 

 obtusely keeled, rather depressed at the upper part, 

 obliquely plicately striated, delicately indentcdly de- 

 cussated throughout ; fulvous, encircled with a broad 

 chestnut band beneath the keel ; whorls five ; aper- 

 ture transversely lunar, white within ; Up sim])le, 

 slightly thickened inwardly. 



Adams and Reeve, Zool. Voy. Samarang, Mollusca, p. G2. 

 pi. IG. f. 8. 



Ilab. Philippine Islands ; Belcher. 



Allied to H. citrina, but of stouter growth, with the 

 surface indentcdly decussated. 



Species 376. (Mus. Cuming.) 



Helix labiata. Hel. testa peranguste wMlicatd, de- 

 pressd, tenui, striatuld, superne lineis concentricis ob- 

 solete decussald, baai Uevigatd, nitidd, fulcd ; spird 



planiusculd ; anfractibus sex, convexiutculii, ultimo 

 dilatato, depresso ; aperturd laid, lunari ; peristomate 

 acuta, plerumque rufescenle, intus calloso-labiato, mar- 

 ffine supero antrorsum rotundalo, batali plane subar- 

 cuato, columellari vix reflexiuscuto. 



The lipped Helix. Shell very narrowly umbilicated, 

 depressed, thin, finely striated, obsoletely decussated 

 above with concentric lines, smooth at the base, 

 shining, fidvous ; spire rather flat ; whorls six, rather 

 convex, the last dilated, depressed ; aperture broad, 

 lunar ; lip sharp, generally stained with red, callously 

 lipped within, upper margin rounded in front, basal 

 flatly subarchcd, columcUar miu^n but little reflected. 



Pfeiffer, Pro. Zool. Soc. 1845, p. 65. 



Ilab. Landour, lUndoostan ; Hutton. 



The surface of this species is not characterized by the 

 indented net-work of the preceding, but is smooth and 

 shining. 



Species 377. (Mus. Cuming.) 



Helix Beookei. Hel. testd sinistrali, imperforata, sub- 

 discoided, obesd, carinatd, supra carinam albidd, cat- 

 taneo tinctd et strigillatd, infra intense castaned ; an- 

 fractiius quatuor ad quinque, plano-convexis, ultimo 

 basi rotundalo, radial im striata, medio impresso; aper- 

 turd oblique otatd, intus cierulesceute ; peristomate in- 

 crassato, marginibus callo junetis. 

 Brooke's Helix. Shell sinistral, imperforated, sulxiis- 

 coid, stout, keeled, above the keel whitish, stained 

 and streaked with chestnut, below it very dark 

 chestnut ; whorls four to five, flatly convex, the last 

 rounded and radiately striated at the base, im- 

 pressed in the middle ; apcrtiurc obliquely ovate, 

 bluish within ; lip thickened, margins joined by a 

 callous layer. 

 Adams and Reeve, Zool. Voy. Samarang, MoUusca, p. 00. 



pi. 15. f. 4 a, b. 

 Hab. Mountains of Borneo. 



This fine species is named in honour of the illustrious 

 British rajah, Sir James Brooke, whose zealous labours to 

 establish a civilized colony in Borneo, and to exterminate 

 piracy from the seas of the eastern Archipelago, deserve 

 the thanks of all oriental merchant-traders, and the honest 

 approval of every right-minded Englishman. 



Februarj', 1852. 



