160 AMPH1DROMUS, GROUP VI. 



b' 1 . Shell yellow above, green below ; spire pyramidal ; lip 

 thick, completely adnate and black -bordered behind. 



dohrni, p. 173. 



I s . Shell clouded, streaked or banded with reddish or green 

 on a yellow ground ; stoutly ovate. conies, p. 170. 



I*. Shell copiously streaked with brown. 



c. Base abruptly darker than upper surface. 



inversus, p. 1 67. 



c. Base not abruptly darker, often pale below the 

 sutures. 



d. large and solid, clouded, length 6470 mm. 

 cambojicnsis, p. 177. 

 d. 1 Length 40-60 mm.; streaked. 



aureus, p. 160. 

 5. 5 Shell with three broad spiral bands. metabletus, p. 174. 



A. AUREUS (Martyn). PI. 54, figs. 70, 71, 72. 



Shell either sinistral or dextral, long-ovate, solid, smoothislt, yel- 

 low, with a broad white zone below the sutures, and typically laving 

 numerous narrow, reddish-brown, undulating stripes upon the median 

 and basal parts, but not extending over the white zone; usually with a 

 single varix upon the penultimate or front of the last whorl ; spire 

 whitish, the apex typically white, but black in some varieties. 

 Peristome reflexed and recurved, white, not brown-edged; parietal 

 callus white. 



Alt. 58-60, diam. 29-31 mill., or somwhat smaller. 



Prince Island, in Sunda Strait, off the N.-W. extreme of Java, on 

 the upper branches of high trees (Sir Joseph Banks). 



Limax aureus MARTYN, Universal Conchology, iii, pi. 115 (and 

 Chenu's reprint, Bibliotl.eque Conchyliologique, ii, p. 28, pi. 39, 

 f. 2). Chersina fulva and 0. perversa (in part), Prince's Island, 

 HUMPHREY, Museum Calonnianum, p. 63, no. 1163, 1164 (1797). 

 Helix perversa DONOVAN, Naturalist's Repository, or Monthly 

 Miscellany of Exotic Nat. Hist., ii, pi. 49, f. * * typical, and f. * 



color- var. (1824) Not Helix, Balimus or Amphidiomus aureus of 



Dillwyn, Ferussac, Swainson et al. 



This hitherto misunderstood form is one of those brought to 

 Europe by the heroic South Sea explorers of the eighteenth century. 

 Jt was collected by Sir Joseph Banks, who accompanied Cook on 



