AUSTRALIAN LAND SHELLS, 4!) 



XXI. SECTION HYDEA. Adams. 



* H. patruelis. - f H. Angasiana. * H. biteeniata. 



* H. Cassandra. * H. Flindersi. * H. Evandaleana. 



* H. Lincolnicnsis. v " H. Lorioliana. * H. luteo-fusca. 



125. Helix patruelis. Adams and Angus. Plate III. Fig 8. M.C. 

 Adams and Angas, Pro. Zool Soc, 1863, p. 520. 



Shell uinbilicated, orbicularly-depressed, rather coarsely rugosely 

 ribbed, especially at the suture, rather thin, moderately shining, 

 reddish-chestnut, with a pale spiral band under the suture ; spire 

 widely and obtusely-conical ; whorls 5, convex, last whorl sometimes 

 indistinctly angulated, not descending in front ; base smoother and 

 more glossy than above, with a wide yellowish patch surrounding 

 the dark circumference of the umbilicus, which is moderate and 

 deep ; aperture diagonal, lunately-ovate ; peristome simple, thin, 

 straight, the dark columellar margin dilated above and reflected, to 

 cover of the umbilicus. 



Diameter, greatest l - 00 ; least - 80 ; height 0*50 of an inch. 



Habitat. Port Lincoln, under dead logs. Angas. Flinders Island. 

 Cox. 



A very variable species ; an examination of a series collected by Mr. 

 Masters shows the ground colour to range from pale reddish-horny to 

 very dark reddish-chestnut, the band is seldom very well defined, 

 is often very indistinct, and occasionally wanting ; and the yellow 

 patch on the base may be indistinct or absent. Two specimens from 

 Flinders Island are of a smaller variety ; but there can ba no doubt as 

 to specific identity, for one shows very plainly, not merely, in addition 

 to similarity of sculpturing, &c, the pale patch on the lower surface, 

 but also the spiral band below the suture. 



126. Helix Angasiana. Pfr. Plate VI. Fig. 4. M.C. 

 Pfr., Journ. de Conchy!., 1862 ; p. 228. PI. X. Fig. 2. 



Shell perforated, globularly-conical, solid, porcellaneous, shining, white, 

 under the lens closely and irregularly obsoletely rugosely striated, 

 giving a granular feel to the touch, and more obsoletely decussated 

 with spiral lines ; spire conoid, obtuse ; whorls 5, convex, last 

 descending in front, very large, inflated ; aperture moderately 

 oblique, nearly round ; peristome straight, smoothly thickened and 

 expanded, especially on the columellar margin where it nearly con- 

 ceals the umbilicus. 



Diameter, greatest 0-85 ; least G"75 ; height 070 of an inch. 



Habitat. Darling liiver, New South Wales. Masters. 



This singular, smooth, white, porcellaneous shell, without any 

 coloured markings whatever, corresponds exactly with the origi- 

 nal description and figures by Pfeiffer, quoted above. The 

 colour was stated to be "whitish?" It is probable that it was a 

 very old shell, from its extensive deposit of callous matter. 

 Subsequently, in the Journ. de Conchyl., 1863, p. 275, M. Crosse 

 remarks that an examination of two living specimens shows that the 

 diagnosis should be modified, the individual figured having lost all its 



