44 W. T. Blanfortt— On tie Identity of tie [No. 1, 



the Indian species, which is found in the drier parts of India and apparently in 

 other parts of South-western Asia where the fauna has Arahian and African 

 affinities. The animal of Geostilbia has not been examined, but it is said to 

 live underground. It is far from improbable that both G'celostele sealaris 

 and Aclatina halanus have a similar habitat, and this would account for 

 then- not having hitherto been observed living. 



I think that there is some possibility too that these forms may be 

 allied to Fnnea, Streptaxis, and Streptostele. All have the very peculiar 

 glassy structure characteristic of the Streptaxidce. If this be the case, the 

 animal will probably be brightly coloured, yellow or scarlet, or both. It 

 is to be hoped that some Indian naturalist may succeed in obtaining these 

 species alive and determining their affinities. 



If the opinions above expressed be correct, the synonymy of the two 

 forms of Coelostele will be the following : 



1. CffiLOSTELE SCALAEIS. 



Coilostele sealaris, Benson, Ann. & Mag. Nat. Hist., 1864, Ser. 3, XIII, p. 136. 



Sab. — Western and North-western India. 



2. CCELOSTELE Sp. 



Francesia sealaris, Paladilhe, Ann. Mus. Civ. St. Nat. Gen., 1872, III, p. 10, PL I, 

 fig. 1-4.— Issel, ib, IV, p. 521, 530. 



Hal). — Aden in Arabia and Sek Said Island, Dahalac Archipelago, 

 Eed Sea. 



I do not propose a new name for the second species, although I think 

 it requires one, because I have a great dislike to giving names to species 

 which I have not seen, because there is still a possibility that the genus 

 Francesia may not be identical with Coelostele, as the peculiar character of 

 the latter, the absorption of the axis in the upper whorls, has not been ob- 

 served in the former, and thirdly because I consider the practice so prevalent 

 amongst some naturalists of giving new names to everything they are unable 

 to identify extremely objectionable and liable to cause confusion. I trust, 

 however, that either M. Issel or M. Paladilhe will re-examine the Aden shell, 

 and, if, as I anticipate, it proves to belong to the genus Coelostele, re-name it. 



Besides Francesia sealaris, the following species are described from 

 Aden by M. Paladilhe : 



Limicolaria Bourgignati. 

 Fnnea Isseli. 

 Pupa Antinorii. 

 Ccecilianella Isseli. 

 Plysa Beccarii. 



1. 



Bulimus JTeinenensis. 



6. 



2. 



B. Samavaensis, Mousson MS. 



7. 



3. 



B. vermiformis. 



8. 



4. 



B. cerealis. 



9. 



5. 



B. lucidissimus. 



10. 



