30 THE NAUTILUS. 



Turbonilla tenuicvla Girl. 



Turbonilla torquata GUI. 



TurboniUa tridentata Cpr. 



Turbonilla sp ? a few specimens dredged at 15 fathoms were of a 

 light brown color and extremely slender. Held at Washington for 

 further study. 



Turritella Cooper i Cpr. 



Venus toreuma Gld., one dead shell. 



Volvula cylindrica Cpr. 



NOTES ON THE MOLLUSKS OF LILYCASH CREEK. 



BY FRANK C. BAKEU. 



Some time ago Mr. J. H. Handwerk and Mr. W. Cliadwick began 

 a systematic survey of the little stream known as Lily cash creek, 

 near Joliet, 111., dividing it into sections. Section T extended from 

 the mouth of the creek, where it emptied into the Desplaines River, 

 to the Plainfield road, a distance of about two and one-half miles. 

 Later, they propose to take up section II, which will include the bal- 

 ance of the creek. A list of the species found within that area, 

 which Mr. Handwerk was kind enough to submit to me for identi- 

 fication, may be of interest, since the region has afforded several 

 peculiar new species, and is very prolific in Spha;riida3. 



The writer is indebted to Dr. V. Sterki and Prof. H. A. Pilsbry 

 for the identification of several of the species enumerated. 



The following species were collected : 

 Sphcerium stamineum Conrad. Pisidium sp. Now in the hands 

 Sphcerium lilycashense Baker. of Dr. V. Sterki, who believes it 



Sphcerium striatinum Lamarck. to be a new species. 



Spharium simile Say. Pisidium roperi Sterki. 



Sphcerium occidental Prime. Limncea kumilis Say. 



Calycidina transversa Say. Limncea desidiosa Say. 



Calyculina truncata Linsley. Planorbis parvus Say. 



Pisidium virginicum Gmelin. PJiysa. heterost.roplta Say. 



Pisidium abdilum Haldeman. Pleurocera elevatum Say. 



Pisidium compression Prime. Amnicola limosa Say. 



