THE NAUTILUS. 143 
356. SUCCINEA SILLIMANI Bld. Nevada, California. 
357. SuccinEA HIGGINSI Bld. Put-in-Bay, Lake Erie. 
358. SuccINEA RETUSA Lea. Canada to Montana, southward to 
Georgia. Includes S. ovalis Gld. not Say, S. forsheyi Lea, S. wilsoni 
Lea, S. calumetensis Calkins, S. peoriensis Wolf. 
358a. SUCCINEA RETUSA MAGISTER Pils. Mississippi valley from 
Tennessee to Minnesota: Michigan. 
358b. SuccINEA RETUSA DECAMPI Tryon. Michigan. 
359. SuCCINEA NUTTALLIANA Lea. Washington to California. 
360. SuccINEA HAYDENI W.G. Binn. Nebraska to Utah. A 
form minor W. G. B. is recorded from Great Slave Lake. 
361. SuccINEA HAWKINS! Baird. Lake Osoyoos, B. C. 
(Neritostome.) 
362. SuccINEA OBLIQUA Say. Canada to Montana, south to 
Nebraska, Arkansas and Georgia. 
362a. SUCCINEA OBLIQUA TOTTENIANA Lea. Canada to Middle 
States. 
( Campestres. ) 
363. SUCCINEA CAMPESTRIS Say. Georgia and Florida. 8S. i- 
flata Lea is a synonym. 
363a, SUCCINEA CAMPESTRIS UNICOLOR Tryon. New Orleans, 
La. 
364. SuccINEA LUTEOLA Gld. Texas; western Florida to the 
Keys. 
365. SuCCINEA CONCORDIALIS Gld. Lake Concordia, Texas. 
366. SuCCINEA GROSVENORII Lea. Louisiana, Mississippi and 
Texas north through Kansas and Nebraska to Great Slave Lake ; 
Colorado, Montana and Utah. Synonyms are S. lineata Binn. not 
DeKay, mooresiana Lea, greert Tryon. Forms elonguta (Kremml- 
ing, Colo.) and rufescens Ckll. (Lee Co., Texas) are described. 
(Lucene. ) 
367. SUCCINEA AVARA Say. Canada to Georgia, west to Minn., 
Mont., Utah, Texas, California. Forms alba Ckll., Custer Co., Col. 
wardiana Lea, vermetu Say, compacta Ckll., major Binn. are de- 
scribed. 
368. SUCCINEA AUREA Lea. New York, Ohio. 8S. haleana Lea, 
Alexandria, La., is probably synonymous. 
369. SuccINEA VERRILLI Bland. Anticusti Island. 
