HELIX. 123 



H. DISCOBOLUS, Shuttle worth. PI. 24, figs. 41, 42. 



Narrowly, profoundly umbilicated, discoidal, much depressed, 

 very acutely carinate, somewhat solid, strongly plicate-costulate,. 

 corneous ; whorls 6, flat, compressed, with impressed line above the 

 carina, not descending in front, base obtusely angulated around the 

 umbilicus; peristome acute, upper margin straight, the basal a 

 little reflected, the columellar thickened, with a small tubercle. 



Diam. 18 mill. 



Canary Islands. 



It is H. afficta, Orb., not Fer. 



H. FORTUNATA, Shuttlew. PI. 24, figs. 55-57. 



Moderately umbilicated, thin, scarcely shining, very closely irregu- 

 larly striate, corneous brown ; Avhorls 5, almost flat, with a more 

 or less distinct impressed peripheral line, last whorl a little wider 

 than the penultimate, carinate, subdilated and scarcely descending 

 in front, base more convex ; lip subexpanded, acute above, curved, 

 reflected and a little thickened below. Diam. 14 mill. 



Teneriffe. 



H. PTHONERA, Mabille. PL 38, figs. 7-9. 



Umbilicated, solid, costulate, dull reddish corneous, with very 

 caducous short hairs, subgranular ; whorls 6, a little convex, regu- 

 larly increasing, with well-impressed suture, periphery angulated ; 

 peristome a little thickened and reflected, margins converging,, 

 joined by a thin parietal lamina. Diam. 7*58 mill. 



Teneriffe. 



H. EVERIA, Mabille. PI. 38, figs. 4-6. 



Narrowly umbilicated, thin, striate, with caducous short hairs, 

 yellowish brown ; whorls 5, the last rapidly increasing, suture nar- 

 rowly impressed, periphery obtusely angulated ; peristome a little 

 reflected, sublabiate with white, partly covering the umbilicus. 



Diam. 10 mill. 



Teneriffe. 



Unfiyured and Undetermined Species. 



H. MARCIDA, Shuttlew. / Canary Islands. 



H. CRISPO-LANATA, "VVollastoii. Ins. Palma. 



H. BEATA, Wollaston. Fuertoventura. 



H. GOMER^E, Wollaston. Ins. Gomera. 





