THE NAUTILUS. 129 



681 specimens from one-fourth to full size there was no sinistral 

 shell, but of 410 uterine young three were sinistral. 



A note from Jennie E. Letson in NAUTILUS, vol. xi, July, 

 1897, page 33, stated that the collection of about a hundred 

 species of Ampullaria in the Philadelphia Academy of Natural 

 Sciences had only one sinstral shell, and that was A. conica 

 Wood, but she did not state the locality of it. 



In NAUTILUS, vol. v, page 83, Leslie M. Cockerell of Nor- 

 wood, San Miguel County, Colorado, reported a sinistral Patula 

 cooperi. Pilsbry added a note that while this was a rare malfor- 

 mation in America, it occurred more frequently with this than 

 in most species, and that several cases were on record. 



F. C. Baker in "The Lymnseidse of North and Middle 

 America," says that a sinistral Lymna?a is rarely found. A 

 Galba obrussa was found in the collection of Henry Hemphill, 

 and a Galba palustris in the collection of Dr. W. A. Nason. 



I have in my collection two sinistral shells of Campeloma sub- 

 solidum, from Flat creek, in Pettis County, Missouri, and a 

 Pyramidula alternata Say, from near Columbia, Mo. This is 

 the first sinistral land shell I have ever found. 



In the neighborhood of this town I have found more abnor- 

 mal crinoids, than in all other localities combined ; but whatever 

 the causes may have been to produce these malformations, they 

 have not noticeably operated to produce abnormal shells. 



Columbia, Mo. 



MOLLTISKS OF ANAHEIM BAY, CALIFORNIA. 



BY E. P. CHACE. 



I am enclosing a list of shells that were collected at Anaheim 

 Landing by myself and wife with a little help at times, the shells 

 being all in my collection. I have done no dredging and think 

 that if I did I would add several species to the list. The total 

 length of shore included in the collecting is less than 3k miles, 

 about being in the bay and the rest ocean beach, and no rocks 

 in sight within 4 to 5 miles. 



