284 HELIX-PLANISPIRA. 



H. porcellana GRAT., Actes de la Soc. Linn, de Bordeaux, xi, p. 

 410, t. 1, f. 5, 6, 1839. PFR., Mon. Hel. Viv. i, p. 346 ; v, p. 355. 

 MARTENS, Ostas. Zool, p. 302 and 397. 



The description above is taken from the original one. Pfeiffer 

 says (Monographia, 1. c.) that Wallace found the species upon the 

 Island of Lombok. The very poor original figures are given. The 

 locality given by Grateloup is " Cuba.'' 



This is a form much resembling shells of the Haitian section Cep- 

 olis. Among Oriental snails it may be compared with H. merarcha 

 Mabille, and H. endoptycha Mart. 



Group of H. zonalis. 



Spire convex, not concave, the apex not sunken ; lip narrow, re- 

 flexed; surface not hirsute or showing scars or granules; suture 

 bordered by a white band ; umbilicus open ; bands not continued 

 upon the lip. 



H. ZONALIS Ferussac. PI. 45, figs. 24, 25, 29, 30. 



Shell umbilicated, depressed, the spire a little convex ; brownish- 

 corneous or isabelline, with two chestnut bands above and two be- 

 neath ; a white margin to the suture ; base flattened, scarcely at all 

 swollen, scarcely constricted behind the basal lip. Aperture rounded- 

 oval, peristome evenly expanded and subreflexed all around, the 

 basal margin toothed. 



The shell is rather thin, very delicately striated ; whorls 4i-5, 

 slightly convex, the last descending in front ; aperture very oblique, 

 purplish-white inside ; peristome white, its ends approaching, basal 

 lip usually one-toothed. Alt. 12, greater diam. 26, lesser 21 mill. 



Moluccas, Ternate group, at Dodingo ; Is. of Halmaheira ; Port 

 Dorey, New Guinea. 



H. zonalis FER. Hist., t. 70, f. 5. PFR. Monogr. i, p. 380. 

 MARTENS, Ostas. Zool., Landschn., p. 299. TAPP. CAN. Ann. Mus. 

 Civ. Geneva, xix, p. 183. Planispira zonalis BECK, Index p. 30.- 

 WALLACE, P. Z. S. 1865, p. 409. H. zonaria (in part) of some 

 authors. H. leucostoma ADS. & RVE., Voy. Samarang, Moll., p. 

 61, t. 16, f. 3. 



The bands usually number four, but the upper one is frequently 

 very narrow, sometimes lacking ; those on the base are broader.* 

 The banding would be represented by the formula 02345, or (rarely) 

 00345. 



