STKES : NOTES ON CEYLON LAND-SHELLS. 161 



parietal armature of the Pledopylis {Syhesia) type. It may well be, 

 however, that if his specimens were not in good condition this would 

 not be apparent. The only other difficulty arises in the dimensions. 

 Pfeiffer gives " Diam. maj. 7^, min. 61, alt. 3 J mill. " for a shell 

 of 4|- whorls : one of mine, which has a whorl more, measures 

 diam. 6, alt. 3-5 mm. It is frequently, however, difficult to reconcile 

 measurements of small shells, and if he included the projecting hairs 

 in his "diam. maj." all difficulties would vanish. I think, therefore, 

 that it is wiser to refer these shells to Pfeiffer' s species, which must 

 be regarded as a Syhesia, than to describe them as new. Mr. CoUett's 

 specimens are from Haputale, at 5,000 feet; I have also a dead shell 

 found by Mr. Preston at Patapolla at 6,500 feet. 



5. Helix Hutxoni, Pfr. — Eecently I recorded from Ceylon a form 

 which I was unable to separate specifically from the Helix Huttoni 

 of Pfeiffer. Thinking it possible that the specimens might prove 

 to be very closely allied to Sygromia Radleyi, Jousseaume,^ I sent 

 one to that author for examination. He informed me that it was 

 very closely allied to his species, but was smaller, the spire was less 

 elevated, and the umbilicus larger. Examining several specimens 

 I find that they vary as follows : — 



Diam. max. 11 mm. ; alt. 5 mm. 



1 4-9 



>> >? "5 ,, ,, 4'o ,, 



9 4-8 



q.o 4 



11 11 ^ ^ 11 11 ^ 11 



It will be seen, therefore, that the shell is variable, and I think 

 both forms will prove to belong to S. Huttoni; the width of the 

 umbilicus would naturally become larger in the more depressed form. 

 Perhaps the Ceylon form may be distinguished as var. Radleyi, Jouss. 



^ Mem. Soc. Zool. France, vol. vii, p. 284, pi. iv, fig. 6. 



