514 PROCEEDINGS OF THE ACADEMY OF [Sept., 



are found. At the bottom of a fissure in the limestone or under a 

 cliff at the base is generally found a grave-yard of these shells, often 

 several bushels in the space of a few feet. Fresh shells are more 

 uncommon. As the woods are here all connected more or less, no 

 attempt was made to keep the colonies separate, but from a study of 

 these dead shells it would probably be easy to distinguish a number. 

 About twenty different hills were explored from the base to the top, 

 besides the caves and sink noted above, and many specimens were 

 taken from small exposures and stone piles in the cleared ground. 

 The elevation of the road at Somerset is about 2,200 feet above sea 

 level, and the hills rise for 200 or 300 feet more in some cases. 



HELICIDiE. 

 Cepolis (Dialeuca) nemoraloides (C. B. Ad.). 



Woods opp. Cedar Hill; Lower Santa Cruz road, about 3 miles 

 southwest of Mandeville. 



Cepolis (Dialeuca) conspersula (C. B. Ad.). 



Somerset. 



Cepolis (Hemitrochus) graminicola(C. B. Ad.). 



Benmore, Mandeville ; roadsides about 3 miles north and east of 

 Mandeville; Cedar Hill; Santa Cruz road, common all along the 

 road; Somerset road; Somerset. 

 Pleurodonte bainbridgei (Pfr.). 



Cedar Hill, woods near King Edward's Hotel, Garrett's woods, 

 ridge near Lincoln, and at Somerset. The pale variety pretiosa was 

 not found. 

 Pleurodonte acuta goniasmos ('A. D. Brown' Pils). 



Kendal road, 3-3^ miles northwest of Mandeville; near Bloomfield; 

 woods at Benmore Hotel and King Edward's Hotel, Mandeville; 

 Cedar Hill ; Garrett's woods ; Santa Cruz road, 2-4 miles out ; Somerset 

 road, 2 miles out; ridge near Lincoln; Somerset. 



The form from Somerset is rather large, resembling figures 60, 62, 

 63, 64 of plate 26, Manual of Conchology, Y, though neither of those 

 figures is wholly like the prevalent type. 4 



The form from other localities mentioned is smaller and higher. 

 It has not been illustrated, though abundant and well known, but 

 plate 26, fig. 59 of the Manual, Vol. V, somewhat resembles it. Helix 



4 Figures 59, 63, 64 of plate 26 of the Manual, Vol V, do not represent P. 

 nobilis C. B. Ad., which Pilsbry had not correctly identified at the time that 

 volume was written. Figures 5, 59, 60, 62, 63, 64 of that plate are all forms of 

 goniasmos, of which nannodonta A. D. B. is merely a form. 



