112 THE NAUTILUS. 



Tapes staminea Conr. 



Placimanomia macroschisma Dh. 



Katherina tunicata Wood, 

 and two species that I have not located as yet. 



At low tide Tritonium oregonense is very plentiful and busy filling 

 their egg cases. Out of the hundreds seen, but one miniature specimen 

 possessed the beautiful epidermis that characterizes the species; the rest 

 were eroded so badly that in some cases the body whorl was alone whole. 



At the high tide mark Littorinas were so thick that both hands 

 could be scooped up full, and the color varieties were all there. 



Under the stones at near low tide the beautiful Eulimas were so 

 plentiful that under one stone, not larger than a dinner plate, I gathered 

 over luO ; but the tide would not wait for me, so I had to leave this 

 rich field before I had half explored it. The steamer had finished 

 coaling j so I bid adieu to the northern country with much regret. 



I wish to thank Messrs. Dall, Clapp and Pilsbry for straightening 

 out the material which I brought down. 



UROSALPINX CINEREUS IN SAN FRANCISCO BAY. 



In THE NAUTILUS for June, l9t, I called attention to the occur- 

 rence of the eastern ' ; oyster drill," Urosalpinx cinereus (Fusus 

 cinereus Say), on the beds of transplanted eastern oysters near Bel- 

 mont, as announced in Mr. Charles H. Townsend's paper* on '-The 

 Oyster Resources and Oyster Fishery of the Pacific Coast." The 

 Belmout beds are on the western shore of the bay on the flats of San 

 Mateo county. Within a few days I have received from Mr. Henry 

 Hemphill several examples of this familiar form, collected by him on 

 the old oyster beds on the eastern shore or flats of Alameda county. 

 In course of time this species will no doubt be found elsewhere, and 

 become numerous on both sides of the southerly portion of San Fran- 

 cisco bny. Mr. Hemphill, it may be remembered, was the first to 

 detect the presence of Mya arenaria hereabout (named by Dr. New- 

 comb at the time M. Hvmphilli). It is not unlikel}' the mussel so 

 frequently found adhering to the eastern oysters, Mytilus hamatus 

 Say, will sooner or later turn up in the bay region, and Mr. Hemp- 

 hill may be the first to find it. 



ROBERT E. C. STEARNS. 

 Los ANGELES, CAL., December 7, 1898. 



* Report of the U. 8. Fish Commissioner, etc., 1889-91, published in March, 1893 



