THE NAUTILUS. 



Several times during the last few years I have received the 

 two forest snails Polygyra columbiana and Circinaria Vancouver - 

 ends from Unalashka. At first I felt confident that some error 

 had occured in labeling, as during my visits at that locality, 

 1871 to 1880, there was no grove or forest to shelter them and 

 assiduous collecting failed to reveal their presence. However, 

 in 1899 I found the transplanted Sitka spruce planted on one 

 or two of the islets in the bay had made an extraordinary growth, 

 and as these snails are always associated with the spruce and 

 fresh specimens have been lately received from the locality, I 

 can no longer doubt that the introduction of the species and its 

 acclimation have been successful. The Circinaria are small and 

 of a dark olive-green, the Polygyra normal. 



A NEW CALIFORNIA!? SIGAKETUS. 



BY MRS. IDA S. OLDROYD. 



SlNUM CALIFORNICUM, n. Sp. 



Shell white, convex, spirally striate above, with epidermis of 

 a rusty yellow; a thin columellar callus reflected nearly over 

 the umbilicus showing only a faint trace of umbilicus; interior 

 snow-white. This has been called Sigaretus debilis Gld., but it 

 is not like the specimens from Lower California. It differs 

 from S. concavum in not being as convex, and the interior being 

 white, and the early whorls are much smaller, and from S. debile 

 in being convex and larger. S. debile is very flat, the early 

 whorls are smaller and fewer. Length of shell 38 mm., breadth 

 18 mm., height 18 mm. 



The type comes from San Pedro, California. The type and 

 nine specimens are in the Oldroyd collection at Stanford Uni- 

 versity. Others are in the collection of the U. S. Nat. Museum, 

 from localities ranging from Monterey, Cal., to Todos Santos 

 Bay, Lower Cal. 



