AUSTRALIAN LAND SHELLS. 107 



253. Helicina Gladstonensis. Cox. Plate XVII. Fig. 11 

 natural size, 11a., lib. much magnified, lie. portion of surface. M.O. 

 Cox, Catalogue of Australian Land Shells, p. 34, 1864. 



Shell dopressly globular, very irregularly rugose, the corrugations 

 often confluent, tending to run in two directions and cross each 

 other diagonally, with some spiral lines, and others oblique, pale 

 reddish-brown, sometimes whitish towards the mouth, mottled with 

 white wrinkles, which look as if enamelled ; spire broadly conical, 

 obtuse ; whorls 5, last obscurely angulated at the base, convexly 

 rounded for remainder ; callous deposit at the base thin, granulated ; 

 aperture diagonal, triangularly semi- circular ; peristome white, 

 thickened, moderately reflected, angular above, rounded below, 

 moderately produced in front ; operculum dark, horny. 



Diameter, greatest - 15 ; least - 13 ; height 0'10 of an inch. 



Habitat. Gladstone, Port Curtis, Queensland. Blomfield. 



The smallest recorded Australian species, variable somewhat in colour, 

 but very remarkable on account of the irregular rugae, sometimes 

 continuous, and forming short elevated linear wrinkles. 



254. Helicina fulgurata. Cox. Plate XVII. Pig. 10 natural 

 size, 10a., 10 b. much magnified. 



Shell lenticular, sharply carinate, without any spiral lines, only shew- 

 ing very faintly under a lens of high power, radiating striae, rather 

 shining, reddish-yellow, with numerous zigzag white radiating bands; 

 spire broadly conical, scarcely obtuse, suture margined along penul- 

 timate whorl ; whorls 4J, nearly flat, last very sharply carinated, 

 base with a circumscribed callous deposit ; aperture somewhat 

 triangular, oblique ; peristome {not perfect) very slightly arcuate 

 above, more so below, with an external angle, columella straight ; 

 operculum shelly, white. 



Diameter, greatest 0'25 ; least 0*20 ; height - 12 of an inch. 



Habitat. Rocky Isle, near Cape Flattery, N. E. Australia. Mac- 

 Gillivray. 



255. Helicina Lizardensis. Cox. Plate XVII. Fig 12 natural 

 size, 12 a., 12 b. much magnified, 12 c. operculum. M.O. 



Shell between globosely-conical and trochiform, rather solid, glossy, 

 spirally, regularly striated, with very faint radiating decussated 

 lines, whitish, with one broad spiral yellow band ; spire broadly 

 conical, apex obtuse ; whorls 5, flattened, last rounded at the peri- 

 phery; base with an extensive deposit of thin granulated callus, 

 partially circumscribed by a groove ; aperture diagonal, somewhat 

 triangular ; peristome white, slightly thickened and expanded, 

 angular above, roundly produced outwardly, and roundly joining the 

 columella ; operculum reddish-horny. 



Diameter, greatest 0-25 ; least 0-23 ; height 0'21 of an inch. 



Habitat. Lizard Island, N. E. Coast of Australia. MacGilMvray. 



Judging from Pfeiffer's description of H. Yorlcetisis this is its nearest 

 ally ; indeed, were it not that my six specimens exactly agree with 

 each other in sculpture, markings, &c., and have the operculum 



