62 PEECY SLADEN TEUST EXPEDITION. 



15. Streptostele nevilli, H. Ad. 



Ennea [Ehna] nevilli, H. Adams, Proc. Zool. Soc. 1868, p. 291. 



Streptostele (Elma) nevilli, H. Ad. ; Martens, Mt. Zool. Mus. Berl. i. (1898) p. 14. 



MaJie: Chateau Margot, 1800 feet; Mountain Porest, Cascade, 1000-1500 feet: 

 summit of Mt. Sebert, 1800 feet ; Mt. Alphonse, Cascade, 1000-1800 feet. 

 Silhouette. 

 Praslin : Valley of Coco de Mer. 



16. Kaliella subturritula, Nevill. 



Helix [Conulus) subturritula, Nevill, J. As. Soc. Bengal, xxxix. (1871) p. 7. 

 Kaliella subturritula, Nevill ; Martens, /. c. p. 16. 



Mahe : Mt. Alphonse, Cascade, 1800 feet ; Mountain Forest, Cascade, 2000 feet ; 

 Chateau Margot, 1600 feet. 



There may be more than one form here, but I am not well enough acquainted with 

 the genus to discriminate them. 



17. Pilula mahesiana, Martens. 



Helix prcetumida, Morel., var. mahesiana, Martens j Martens, /. c. p. 16. 



Mahe. 



A study of authentic specimens of Morelet's Helix prcBtmnida, kindly lent by 

 Mr. Ponsonby, leads me to regard Martens's variety as being a distinct species from the 

 Reunion shell. It is smaller, not so swollen or elevated, and I am unable to trace, in 

 Morelet's species, the well-marked spirals so characteristic of Pilula mahesiana. 



18. Eiilota similaris (Ferussac). 



Helix {Eulotella) similaris, Ferussac ; Martens, /. c. p. 17. 

 Mahe : N. of Victorinc ; Cascade Forest ; Bel Ombre ; Chateau Margot, 1600 feet. 

 Silhouette. 

 Praslin. 

 Widely distributed over the world, especially where coffee is grown. 



19. Stylodonta unidentata (Chemnitz). 



Helix unidentata, Chemnitz ; Martens, /. c. p. 18 ; Pilsbry, Man. Conch, vi. p. 86. 

 Mahe : Mountain Forest, Cascade ; Cascade, 1000 feet ; Trois Freres. 

 Silhouette. 

 Praslin. 



20. Stylodonta studeriana (Ferussac). 



Helix studeriana, Ferussac ; Martens, I. c. p. 18 ; Pilsbry, Man. Conch, vi. p. 87. 

 Praslin. 



