44 HELIX. 



H. SEMIPLTCATA, Pfr. PI. 4, figs. 62, 63. 



Very widely umbilicated, subdiscoidal, somewhat solid, plicate 

 above, light corneous, maculated with chestnut; whorls 7, very 

 narrow, a little convex, peripheiy carinate, base convex, smooth- 

 ish. Diam. 65 mill. 



Ins. Madeira. 



H. Gueriniana, Lowe, is a synonym. 



H. CALATHOIDES, Paiva. PL 3, figs. 97-99. 



Very widely, perspectively urnbilicated, obsoletely or obtusely 

 annulate or carinate, rather solid, with strong costse above, 



C3 O 7 



ending at the angle, smoothish on the base, suture very distinct; 

 whorls 7-8, a little convex, slowly increasing. Diam. 7-8 mill. 



(Subfossil). Inn. Bugio, near Madeira. 

 Closely allied to the foregoing species. 



H. RETEXTA, Shuttleworth. PI. 4. ftes. 64-66. 



7 - ~ 



Umbilicatcd, depressed, rather thin, closely subarcuately cos- 

 tate above, chestnut color with paler maculations ; apex more or 

 less depressed ; whorls 6, convex, narrow, subequal, periphery 

 angulated, base shining, smoothish, umbilicus very wide. 



Diam. 7 mill. 



Ins. Palma, Canaries. 

 H. CORTICOLA, Cox. PL 5, figs. 71, 72. 



Openly umbilicated, a little shining, irregularly strongly cos- 

 tulate, fulvous chestnut color, with radiating lighter lines; 

 whorls 5, slopingly convex, periphery obtusely carinated, the 

 carina obsolete at the mouth, base smoothish, with slight obso- 

 lete spiral lines. Diam. 8 mill. 



Richmond River, Australia. 

 H. MUCOSA, Cox. PL 5, figs. 73, 74. 



Widely, perspectively umbilicated, subdiscoidal, irregularly 

 closel} T rugosely striated, rather solid, glimmering, apex sub- 

 immersed ; whorls 4^, slowly increasing, a little convex, the last 

 deflected in front, periphery obsoletely carinate, base convex, 

 less roughly striated than above. Diam. 8 mill. 



Clarence River, New South Wales. 



II. MUCOIDES, Stephens. PL 5, figs. 75, 76. 



Widely umbilicated, rather solid, somewhat shining, irregu- 

 larly corrugatel}* striate, translucent, yellowish horn-color, 



