342 THK NAUTILUS. 



This little shell is related to cuhensis but is easily distinguished by 

 its thinner shell, more pointed spire, less rounded whorls and more 

 elongate aperture. The shape of the aperture and the form of the 

 columella are different from those of humilis. 



Lymncua stagnalis var. higleyi, new variety. 



Shell ovate with short spire and wide, spreading aperture which 

 is twice the length of the spire ; whorls rather flat-sided, the last 

 somewhat shouldered ; coUumellar plait very large, thick, heavy, 

 shining, white ; aperture widely flaring, the upper part somewhat 

 shouldered; umbilicus tightly closed by the closely appressed, reflec- 

 ted, columellar callus. 



Length 50.00 ; width 30.00 ; aperture length 32.00 ; width 22.00 

 mill. (Ferriss). 



Length 42.00; width 27.00; aperture length 27.00; width 19.00 

 mill. (Academy). 



Length 38.00; width 22.00; aperture length 25.00; width 17.00 

 mill. (Walker). 



Habitat ; Michipecoten Bay, North Shore, Lake Superior. 



In a lot of specimens of Lymnaea stagnalis sent to the writer for 

 examination by Mr. J. H. Ferriss, there were three specimens which 

 differed markedly from any described American form of this species. 

 The nearest variety seems to be Hemphill's occidentalis, but that 

 form is decidedly more shouldered on the body whorl, the aperture 

 does not flare and the spire is more " pinched." The color is a clear 

 translucent whitish horn. The writer has seen no European variety 

 exactly comparable with this variety. 



It is named in honor of Prof. William K. Higley, Secretary of 

 the Chicago Academy of Sciences. 



GLOCHIDIA OF UNIO ON FISHES, 



BY CHAS. H. CONNEK. 



A short time ago (Feb. 25, 1905), while hunting especially for 

 fresh-water shrimps, I obtained some young minnows and sun-fish 

 {Eupomotis gibbosus). Upon examination of the latter, I found 

 several Glochidia, apparently of Anodonta cataracta Say, clinging to 

 the anal and caudal fins. 



