292 MR. A. GARRETT ON THE TERRESTRIAL [Mar. 1, 



above which may be observed a sharp deflected jiarietal plait, 

 and a tubercle on the inner margin of the acute peristome, which 

 latter is thickened within. Length 4| millim. 



Genus Pythia, Bolten. 



1 . PvTHiA POLLEX (Hinds). 



Scarains 2)oHex, Hinds, Ann. Nat. Hist. \. p. 82 ; Voy. Sulph., 

 Zool. p. (50, pi. 16. figs. 9 & 10 ; A. Adams, Proc. Zool. Soc. 18.50, 

 p. 1.50 ; Ann. Nat. Hist. 2nd ser. viii. p. G9 ; Reeve, Conch. Icon, 

 sp. 7, fig. 7. 



Fythia pollex, Pfeiffer, Syn. Auric, no. 82 ; Mon. Auric, i. p. 86 ; 

 Brit. Mus. Cat. Auric, p." 65 ; H. & A. Adams, Gen. Moll. ii. 

 p. 240; Mousson, Joiirn. de Conch. 1870, p. 133; Paetel, Cat. 

 Conch, p. 114 ; Schmeltz, Cat. Mus. Godeff. v. p. 87; Cox, Proc. 

 Linn. Soc. New South Wales, vi. p. 611. 



Scarabus zonatus, Hombron & Jacquinot, Voy. Pole Sud, Zool. 

 V. p. 41, pi. 10. figs. 18-20. 



Very abundant and generally distributed throughout the group. 

 Occurs beneath decaying vegetation in forests near the sea-shore. 



This species is subject to considerable variation in size, shape, 

 and colour. Though usually unibilicated, it is nevertheless very 

 frequently imperforate. The shape varies from broad ovate to 

 oblong ovate ; spire subacute, more or less produced, and laterally 

 subangulated. The sculpture consists of longitudinal, closely set, 

 elevated striae, often evanescent on the body-whorl, and very con- 

 spicuous and slightly arched on sjiire and upper part of the last 

 •whorl. The superior parietal tooth is subtriangular, the lower one 

 compressed, fold-like, and subdu[)licated. The columellar jilait is 

 slightly oblicpie, compressed, and in imperforated specimens is con- 

 tinuous with the broadly expanded and shghtly reflected peristome. 

 The palate is armed with two stout and from four to six small 

 teeth. 



The colour varies from light chestnut to blackish chestnut, more 

 or less consjiicuously mottled with luteous, and generally with one 

 or two pale transverse bands above, The varices, which are not very 

 conspicuous, are usually spotted with white or luteous. Uniform 

 horn-coloured or luteous specimens with or without chestnut 

 mottlings are not uncommon. Aperture white or buff-yellow, with 

 or without chestnut maculations. Sometimes the very dark examples 

 show three or four pale transverse bands. The following measure- 

 ments will show the variation in shape and size: — 



Length 36, diam. 21 millim. 

 >> "^4, „ Zo ,, 



j» 23, ,, 15 ,, 



2. Pythia albovaricosa, Pfeiffer. 



Pythia aUovaricosc, Pfeiffer, Zeit. Malak. 1653, p. 190; Syn. 

 Auric, no. 84 ; Mon. Auric, i. p. 87 ; Brit. Mus. Cat. Auric, p. 66 ; 



