meee Y: Variation in Shells. [ ZOE 
Var. fasciata. Uniform light chocolate above and beneath, with 
a dark band at the periphery. : 
Var. Californica. Creamy buff color, darker above than below 
the periphery, very faintly banded. 
Var. albida. Uniform creamy, and sometimes milk white above 
and beneath, and without band. 
Helix Tryonit var. subcarinata Hemphill. Among the sub-fossils 
that occur on Santa Barbara Island we find a form of . 7} ryontt, 
which adds an interesting link to its history and to its present form, 
maybe characterized as follows: 
Shell depressed-globose, consisting of about 5% whorls, the last 
subcarinated at the periphery; in other respects it closely resembles 
the recent form of A. Tryonii. 
Largest specimen: greatest diameter, 23 mm.; altitude, 15 mm. 
Smallest specimen: greatest diameter, 20 mm. ; altitude, 11 mm. 
The occurrence of this subcarinated form on this small island 
seems to indicate that species restricted to limited areas do vary 
very much. 
flelix ruficincta Newc. Santa Catalina Island. I unite with this 
shell A. Gabbi Newc. and H. Jacta Newc. The only differences 
between the three shells, so far as I can see,arethese: A. ruficincta 
is larger than either of the other two; it has an open umbilicus, and 
very fine crowded microscopic revolving lines. FH. Gabdi is sub- 
perforate, and has a finely-granulated surface, while H. Jacta has a 
closed umbilicus. | In size the smallest rujicincta cannot be separated 
from the largest facta or Gabbi. In all other respects the shells 
agree. : 
Largest specimen: greatest diameter, 21 mm.; altitude, 15 mm. 
Smallest specimen: greatest diameter, 15 mm.; altitude, 8 mm. 
Very constant in coloring; but white albinos, with narrow chest- 
_ hut bands, occasionally occur, which are rare. 
Felix ruficincta var. Gabbi Newe. San Clemente Island. 
Largest specimen: greatest diameter, 14 mm.; altitude, 10 mm. 
Smallest specimen: greatest diameter, 7 mm.; altitude, 4 mm. 
Rigid in its coloring, but very variable in size. 
Var. facta Newc. Santa Barbara Island. 
Largest specimen: greatest diameter, 11 mm.; altitude,8 mm. 
Smallest specimen: greatest diameter, 9 mm.; altitude, 5 mm. 
The lot collected shows a great deal of variation in the elevation 
