THE NAUTILUS. 87 



to have escaped their notice. Judging from their descriptions and 

 figures, C. bouthainensis appears to be a synonym of C pyrrha Sykes, 

 and C. minahassce is very close to C. makassarensis ; indeed these 

 last two may be identical, but their figures indicate a shell in which 

 the whorls increase at a more even rate. In both cases the plicae 

 palatales seem to be similar in number, size and position. 



Further, they place C. cehbensis Bttg. (jion Smith) as a variety of 

 C. moluccensis, following Dr. Boettger, 1 who has also proposed Para- 

 phatdusa as a new section for C. subpolita Smith. 



If these conclusions be correct, then the Celebes list will stand as 

 below : 



C. alternata Moellendorff. 



C. cehbensis Smith. 



C. cumingiana Pfr. 



Var. moluccensis Mts. 



celebensis Bttg. non Smith, 

 balantensis Sykes. 

 Var. simillima Smith. 



C. makassarensis Sykes. 



C. minahassce Sarasin. 



C. pyrrha Sykes. 



bouthainensis Sarasin. 



C. subpolita Smith. 



C. nsitata Smith. 



I feel some doubt as to whether C. simillima be not a good species, 

 distinct from G. cumingiana. 



NOTES ON THE MOLLUSCA OF CANANDAIGUA LAKE REGION, N. Y. 



BY DR. CIIAS. T. MITCHELL. 



During the past summer I have collected, mounted and placed in 

 my collection in the Union Free School Building in this village the 

 shells of the following species of mollusca found in the above men- 

 tioned region, which consists of the Lake, its inlet and outlet, and its 

 shores, and glens opening toward the lake; most of the specii - are 

 plentiful, while a few are rare : 



1 Nachrbl. deutsch. malak. Ges. 1899 (April), pp. 56-9. 



