260 MR. NEVILL ON THE LAND MOLLUSKS OF MAURITIUS. [Apr. 2;}, 



sides black, with a pale orange streak down the middle, the poste- 

 rior part being a uniform black ; the tentacles are black. 

 Mauritius. 



GiBBUS (Gibbulina) versipolis, Fe'r. 



The animal in this case has the sole of the foot brownish green, 

 the sides light orange mottled with light reddish brown, the poste- 

 rior part a uniform liver-brown ; the tentacles are dull red. 



Mauritius. 



GiBBUs (Gibbulina) mauritianus. Morel. 



The sole of the foot is yellowish green, the upper surface of the 

 foot neutral brown, shading off to a dark green and becoming yellow 

 posteriorly ; the tentacles are dull purplish brown. 



Mauritius. 



Gibbus (Gibbulina) dussumieri, Reeve. 



The tentacles in this species are black ; the foot iron slate-colour, 

 with a light-grey streak down the centre both anteriorly and poste- 

 riorly. 



Seychelles (Mahe, Praslin, Silhouette, and Felicite). 



The colouring of the animal much resembles that of Gibbulina 

 callifera, although the shell differs widely, being more like that of 

 Gibbus mauritianus. 



Gibbus (Gibbulina) palanga, Fer. 



The tentacles in this species are dull purple ; the upper surface 

 of the foot orange closely mottled with dark olive-green, and the 

 sole of the foot orange. 



Mauritius. 



Gibbus (Gonidomus) sulcatus, Mull. 



The sole of the foot is yellow ; the upper part has the anterior 

 portion scarlet, and the posterior yellowish green ; the tentacles are 

 scarlet. 



Mauritius. 



Ennea (Gulella) clavulata. Lam. 



The tentacles are orange tipped with black ; the foot is yellow 

 both anteriorly and posteriorly, and streaked down the middle with 

 an orange fillet ; the sole of the foot is yellow. 



Mauritius. 



Streptaxis souleyetiana, Petit. 



In this animal the tentacles are black ; the foot is ash-coloured, 

 anteriorly stained with rufous wine-colour (varying in shade), the 

 caudal part sometimes greenish, at others yellow ; the sole of the 

 foot the same. 



Seychelles (Mahe, Praslin, Silhouette, and Felicite'). Found in 

 company with Gibbuli7ia dussumieri. 



