S3 



Specimens available from the Port Stanley area, 85. 

 Morph 7. Plate xxii. 



False Bay is a shallow, sandy body of water forming an in- 

 dentation on the western coastline of San Juan Island. It is 

 guarded at its entrance by two rocky promontories. The speci- 

 mens illustrated were derived from a population inhabiting 

 the more southerly of these capes. 



In this population it will be noted there is a striking uni- 

 formity in the structure of the shells, both as regards size and 

 sculpture. The latter exhibits a feebly expressed but balanced 

 condition in both the spiral and lamellate striae. The colora- 

 tion is uniformly a pale brown. The dentiform tubercles on 

 the inner border of the lip are prominent, and this area of the 

 shell is strongly tinged with purplish brown. 



False Bay is also known locally as Kanaka Bay, and is so 

 designated on the accompanying map, but this name is more 

 properly applied to a small rocky bay located a short distance 

 to the northeast of False Bay. 

 Specimens available, 75. 



Morph 8. Plate xxiii. 



Allan Island lies to the westward of the northern section of 

 Fidalgo Island, in Skagit County, Washington. 



In this morph it will be noted the shells are relatively small 

 and rather uniform in size, which might be attributed to a uni- 

 form and rather unfavorable environment. Coloration is lack- 

 ing. The sculpture is rather uniform and slightly expressed, 

 with a tendency to develop the secondary spiral bands. 



In this population quite a number of the shells carry the 

 characteristic notches indicating the snails had survived the 

 attack of some predator, presumably a bird. 

 Specimens available, 150. 



Morph 9. Plate xxiv. 



Brown Island extends across the entrance to Friday Harbor. 

 On its outer margin it is exposed to the action of storms, while 

 on its inner margin it is quite protected. 



