SYKES— LAND AND FRESHWATER MOLLUSCA. 63 



21. Pachnodus ornatun (Dufo). 



Biilimus ornatns, Dufo, Ann. Sci. Nat. (ser. 2) xiv. (1840) p. 197 ; Martens, Mt. Zool. Mus. Berl. 

 i. (1898) p. 20. 



Mah6 : Morne, 2500 feet ; sumrait of Mt. Sebert ; Chateau Margot, 1600 feet ; 

 Mt. Alphonse, Cascade, 1800 feet. 

 Praslin : Valley of Coco de Mer. 

 Silhouette. 



22. Pachnodus velutinus (Pfeiffer). 



Bulimus velutinus, Pfeiffer, Symb. i. p. 42 ; Martens, /. c. p. 22. 

 Mah^: Trois Frferes, 1500 feet; Morne, 2500 feet; Cascade, 1000 feet; summit of 

 Mt. Sebert; Chateau Margot, 1600 feet; Mt. Alphonse, Cascade, 1800 feet; &c. 

 A long series of this interesting form. 



23. Achatina panthera, F^russac. 



Achatina panthera, Ferussac ; Martens, I. c. p. 22; Pilsbry, Man. Conch, xvii. p. 41. 



Mahe : Trois Freres, 1500 feet ; Chateau Margot. 

 Silhouette. 

 Praslin. 



In addition to its East African distribution, this species has been recorded from 

 Madagascar, Mauritius, and Reunion. 



24 Achatina fulica, Ferussac. 



Achatina fulica, Ferussac ; Martens, /. c. p. 22 ; Pilsbry, Man. Concli. xvii. p. 57. 

 Praslin. 

 Reported from Madagascar, Mauritius, &c. 



25. Stibulina octona, Bruguifere. 



Helic octona, Bruguiere, Encycl. M(5th. i. p. 325. 



Subulina octona, Brug. : Martens, /. c. p. 23; Pilsbry, Man. Conch, xviii. pp. 71, 222. 



Mahe : Chateau Margot, 1600 feet ; Trois Freres, 1500 feet ; Morne, 2000 feet ; 



N . of Victorine ; Bel Ombre. 



Praslin. 



Silhouette. 



Anonyme I. 



Genus OPE AS. 



The species of this genus are very puzzling. I have endeavoured, with the assistance 

 of Mr. Pilsbry's excellent work, correctly to identify them. The form recorded by 

 Martens as 0. clavulinum may belong really to 0. javaniciim. His Mapalus braueri 

 must, I think, belong to the Opeas group, but I have been unable to identify it in the 

 specimens before me. 



