ACHAT] XID,^. 339f 



represent cylindrica, but quite a distinct form which has since 

 been sepanited and named Chiusiliu turritella by Sowerby. 

 Amongst the numerous specimens of C. cjflindrica examined by 

 nie the only entire shells I have seen are two in my own col- 

 lection, which were acquired many years ago amongst a miscel- 

 laneous lot at a sale. One of these is now figured. It is composed 

 of 14: whorls, the first seven being' opacpie white, owning to the 

 withdrawal of the animal from that portion of the shell. That 

 this is a case of true decollation I have !>atisHed n)yself by 

 examining numerous shells with six or seven whorls ; in each case 

 the newly formed apex could distinctly be seen. 



2{)9. Clausula turritella. Sowerhy. 



Claiiiilia cylbulrivn, Ilaiilev & Theobald (non Pfeiffer), Conch. Ind, 



1870, p. 12, pi. i>4, tig-. 4. 

 Clausilia turritella, Sowerby, Conch. Icon, xx, 187-5, C'lausilia, 



pi. 7, tig-. 65. 

 Clausilia elegans, Iluiton, MS. 



Original descrijition : — "Shell yellow, very narrow elongated, 

 pyramidal ; whorls 14, slowly increasing, rather convex, last 

 oblong : aperture oblong, ratlier square, with a single plait over 

 the columella, columella straight.'" (Soiverbi/.) 



Long ](r75 mm. (ex icon.). 



Bah. India : Landour. 



The shell from Landour figured by Hanley &. Theobald as 

 Clausilia ci/lindrica of Gray, copied by Sowerby, is altogether 

 different from that sj)ecies as described and figured by Pfeiffer, so 

 that Sowerby was quite justified in giving it a new name. In 

 iurntella the whorls are more convex, the aperture is much 

 narrower and higher, and the shell much paler in colour. It is 

 rather unfortunate that the whereabouts of Hanley's specimen is 

 unknown. It was not amongst the shells from Hanley's collection 

 presented to the British Musemn by Mr. Harvey. 



Family ACHATINID.E. 

 Subfamily ACHATININ.^. 



Genus ACHATINA, Lamarck. 



Achatina, Lamarck, Mem. Soc. Hist. Nat, Paris, An vii (1799), 

 p. 75; I'ischcr, Man. Conchyl. 1883, p. 486; I'ilsbrv, Man. 

 Conch, ser. 2, xvii, 1904, p. 1. 



Type, Btdla achatina, Linne. 



liange. Tropical Africa (one si)ecies naturalized in India). 

 Shell ovate or oblong, with conic spire and small apex, two or 

 three earliest schorls smooth, formin.of a trocbiform luicleus, obtuse 



z 2 



