50 HELICID^. 



Helix xAcnvm) mperha, Pfeiffer, Malali. Blatt. ii, 1856, p. 144; 



NeviU, Hand List, i, 1878, p. 80. 

 Acavus superbus, Adams, Genera Moll, ii, 1858, p. 195; Pilsbiy, 



Man. Concli. ser. 2, ix, 1894, p. 154; Randies, Proc. Malac. Soc. 



London, Yi, 1900, p. 103, pi. 9, figs. 3, 14 (anatomy). 

 Heliv {Macroon (Acavus)) superba, Pilsbry, Man. Conch, ser. 2, vi, 



1890, p. 81, pi. 16, figs. 3, 4. 



Original description. — " T. imperforata, semigloboso-turbinata, 

 solida, irreg-Lilariter malleata et cingulis obtusis parum elevatis 

 muaita, baud nitida, opaca, castanea ; spira brevis, conoidea, 

 apice obtusiusculo pallida ; sutura luediocris ; anfr. vix 4 rapide 

 accrescentes, vix coiivexiusculi, ultimas peripheria subangulatus, 

 basi planus, antice desceudeiis ; apertura perobliqua, angusta, 

 oblonga, intus coerulescens, uitida ; perist. album, fusco-limbatum, 

 late expansLim, incrassato-reflexum, margiuibus subparallelis, 

 callo crasso junctis, columellai-i calloso, perdilatato, plauo, 

 iutroi-sum dente transverse usque ad marginem dextnim producto, 

 mvinito. 



" Diam. maj. 55, miu. 40, alt. 35 mill." {Pfeiffer.) 

 Hah. Ceylon {NeviU, Gardener). 



This handsome species may readily be separated from licema- 

 stoma, phoenix, fasiosus, and prosperus by the more pronounced 

 angulation of the periphery. The back of the body-whorl is 

 provided with some obliquely descending malleations, a feature 

 lacking in the other species, and the columellar plate is also 

 broader in most specimens. In some the lip, which varies from 

 light or dark brown to deep rose, is white on the inner edge, 

 while I possess two specimens from the H. Nevill collection with 

 a pure white lip ; these two shells are, moreover, remarkable in 

 not being unicolorous, the earlier whorls and the first two-thirds 

 of the last whorl exhibiting dark brown bands on a light ground, 

 regre&ented by the formula 2 3(4 5), all these bands becoming 

 confluent on the latter portion of the last wliorl. 



Var. grevillei, Pfeiffer. 



Helix qrevillel, Pfeiffer, P. Z. S. 185G, p. 387, pi. 36, fig. 8; ibid., 



Novit. Conch, ser. 1, i, 1858, p. 108, pi. 30, figs. 6, 7; Hanley & 



Theobald, Couch. Ind. 1875, pi. 127, tig. 7. 

 Helix (Acavus) grevilUi Martens, Die Heliceen, ed. 2, 1860, p. 172 ; 



Nevill, Hand List, i, 1878, p. SO. 

 Helix (Macroon (Acavus)) superba, var. qrevillei, Pilsbrv, Man. 



Conch, ser. 2, vi, 1890, p. 82, pi. 12, figs. 47, 48. 



The peristome, parietal callus, and columellar plate are blackish 

 brown in most specimens, but in a shell from the H. Nevill 

 collection they are jet-black, the shell itself being greyish-black. 

 In other respects this form cannot be separated from typical 

 A. superbus. 



