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Show 1869.] LAND-SHELLS OF THE SEYCHELLES. 63 a smaller thinner variety than the ordinary Mascarene ones, seldom having a brown band on the last whorl. 2. HELTX (CONULUS), n. sp. 1 From Mahe, Fe'licite, and Silhouette. Rare ; amongst dead leaves, &c, in damp places. 3. HELIX (DISCUS) SERRATUS, H. Ad., n. sp. From Mahe, Praslin, and Silhouette. Uncommon ; on the ground in moist places. 4. HELIX (DISCUS), n. sp. From Silhouette. Very rare. 5. HELIX (STYLODONTA) UNIDENTATA, Chemn. From Mahe, Felicite', Silhouette, and Curieuse. On the ground, amongst decaying leaves of the ordinary Cocoa-nut tree, &c. This species is not found at all at Praslin. The variety from the three latter localities, as given above, differs from the Mahe typical form in being thicker, more produced, with a strongly marked brown band round the last whorl, and in often being deformed. This species, even in its youngest stages, can be readily distinguished from Styl. studeriana, the spiral striae on the first few whorls not being cancellated, as is the case with the latter species; it is also far more globose, &c. &c. The animal is a uniform brown, varying in shade ; the foot underneath is greenish, and the tentacles a purplish grey. 6. HELIX (STYLODONTA) STUDERIANA, Fer. From Praslin only. This species is remarkable from its being restricted to one island, like the extraordinary tree the Coco-de-mer, on whose leaves and trunk it lives; unlike the preceding species, I never found any live specimens of it on the ground. There are two varieties, one a rich brown colour, the other a decided yellow. In shape it always appeared to be perfectly constant; and the reflexed outer lip is always white, whilst in Styl. unidentata it is violet- although I procured one specimen of the latter in which it also was white. 7. STREPTAXIS SOULEYETIANA, Petit. From Mahe, Praslin, and Silhouette. In damp places, on the ground. Animal ash-colour, the posterior part greenish yellow, stained on the neck with mauve (varying in shade), foot (underneath) yellow, tentacles black. 8. ENNEA (ELMA) NEVILLI, II. Ad., n. sp. From Mahe and Silhouette. Extremely rare at the first-mentioned locality, more plentiful at the latter; on the ground, amongst dead leaves &c. |