D~ ft 
THE NATURAL HISTORY SURVEY. 365 
5. A Day ON THE CHICAGO DRAINAGE. CANAL. 
BY FRANK C. BAKER. 
The Nautilus, Vol. XII, No.6, p. 63, October, 1898. 
The following species are enumerated from the western 
region: . 
Anodonta grandis Say. Planorbis trivolvis Say. 
Anodonta imbecilis Say. Planorbis bicarinatus Say. 
Alasmodonta complanata Barnes. Planorbis campanulatus Say. 
Alasmodonta deltoidea Lea. Planorbis truncatus Miles. 
Lampsilis luteolus Lam. Planorbis deflectus Say. 
Sphaerium simile Say. Physa heterostropha Say. 
Spherium stamineum Conrad. Aplexa hypnorum Linné. 
Calyculina truncata Linsley. Gontobasts livescens Menke. 
Succinea retusa Lea. Amnicola limosa Say. 
Limnea desidiosa Say. Ammnicola lustrica Pilsbry. 
Limnea palustris Mill. Amnicola cincinnatiensts Lea. 
Limnea caperata Say. Vivipara contectoides W. G. Binney. 
Limnea humilis Say. Valvata tricarinata Say. 
6. A New SPH&RIUM., 
BY FRANK C. BAKER. 
The Nautilus, Vol. XII, No. 6, p.65, October, 1898. 
Description of Spherium lilycashense Baker, from Lilycash 
Creek, western region. 
7.. NOTES ON THE MOLtusks OF LILYCASH CREEK. 
BY FRANK C. BAKER. 
The Nautilus, Vol. XIII, No. 3, p. 30, 1899. 
The following species are listed from the western region: 
Spherium staminium Conrad. Pisidium sp. 
Spherium lilycashense Baker. Pistdium roperi Sterki. 
Spherium striatinum Lam. Limna@a humilis Say. 
Spharium simtle Say. Limne@a desidiosa Say. 
Spharium occidentale Prime. Planorbits parvus Say. 
Calyculina transversa* Say. Physa heterostropha Say. 
Calyculina truncata* Linsley. Pleurocera elevatum Say. . 
Pisidium abditum Haldeman. Amnicola limosa Say. 
Pisidium compressum Prime. Ammnicola limosa var parva Lea. 
Pisidium walkeri Sterki. Cincinnatia cincinnatiensts Lea. 
Pisidium cruciatum Sterki. Pomatiopsits cincinnatiensis Anthony, 
Pisidium punctatum Sterki. Campeloma rufum Haldeman. 
Pisidium fallax Sterki. (Reversed.) 
Pisidium splendidulum Sterki. 
Pisidium variabile Prime. 
*Mr. Handwerk, who sent the specimens for identification, says, in a letter of recent 
date, that the two Calyculina were from the Desplaines River and not from Lilycash 
Creek. 
