12 THE NAUTILUS. 



columella oblique, with a rather heavy plait ; parietal wall covered 

 by a spreading callus which almost closes the umbilicus; some speci- 

 mens show a tendency to become malieated. 



Length 27.00; width 11.00; aperture length 14.00; width 7.25 mill. 



Lengtli 27.00; width 11. .oO; aperture length 15.00; width 7.50 mill. 



Distribution : Lake Albert Lea, Minnesota. 



Specimens of this very distinct variety were found in a lot of 

 shells received from Mr. Bryant Walker. They look like a widened- 

 out variety exilis with a short spire. They have some relation to the 

 variety iowaensis, but the spire is sharply conic, while in that variety 

 it is dome-shaped. 



GENERAL NOTES." 



LiMAX MAXiMus L. IN CALIFORNIA. — The United States 

 National Museum has recently received several specimens of this 

 species from Mr. S. A. Pease of San Bernardino, Cal. Mr. Pease 

 informs us that they were collected out of doors, near a house, 

 in Redlands, and that it was reported to him that they were 

 feeding upon flowers and plants. He also states that he has heard of 

 this same slug in different parts of San Bernardino county. 



The specimens sent us are darker than the usual East American 

 form and not so large, the longest individual (preserved in formalin) 

 measuring 58. mm. — Paul Bartsch. 



Notice of Six Neav Species of Unios from the Laramie 

 Group.— By R. P. Whitfield (Bull. Amer. Mus. Nat. Hist., XIX, 

 1903, p. 483-487). U. sesopiformis, verriicosiformis, retusoidet 

 hrowni, percorrugata and posthiplicata are described from Snow 

 Creek, on the Missouri River, about 130 miles N. W. of Miles City, 

 Montana. The names indicate the species of the recent fauna be- 

 lieved to be related to these Laramie forms; but the radial V-like 

 beak-sculpture of at least part of them shows that there is nothing iu 

 the supposed relationship of the Laramie forms to any surviving 

 North American Unios. They belong to the Hyriinse of Simpson's 

 arrangement, and are only referable to Unio in a Lamarckian sense. 

 The name Unio browiii Whitf. being preoccupied, that species may 

 be called Parreysia barnnmi. It is named for Mr. Barnum Brown, 

 who collected the series. — H. A. Pihbry. 



