112 



Bryant Wai^ker 



PhYSA MARGARITA LeSSOn. 



Physa margarita Lesson, Rev. Zool., 1840, p. 356. 

 Type locality : Newfoundland. 



Physa mExicana conoidEa Fischer and Crosse. 



Physa mexkana conoidea Fischer and Crosse, Moll. Mex., II, 1886, p. lOi, 



pl. 39. %s. 8-8a. 

 Type locality : Mehedin, Mexico. 

 " Also McLennan Co., Texas, see Strecker, 126, p. 64. 



Physa NiACARiiNSis Lea. 



Physa niagarensis Lea, Pr. A. N.- S. P., 1864, p. 114; Jour. A. N. S. P., Vi, 



1866, p. 168, pl. 24, fig. 97; Obs., XI, 1866, p. 124, pl. 24, fig. 97. 

 Type locality : Niagara River, N. Y. 



Is referred to Integra by Tryon, (132, p. 167), but Crandall (27, p. 55) 

 considers it distinct. 



Physa nickijnii Lea. 



Physa nicklinii Lea, Pr. A. N. S. P., 1864, p. 114; Jour. A. N. S. P., VI, 

 1866, p. 175, pl. 24, fig. loi; Obs., XI, 1866, p. 131, pl. 24, fig. loi. 

 Type locality : Callaghan's, Alleghany Co., Va. 



Is elliptica according to Tryon (132, p. 163) and Crandall (27, p. 55). 



Physa nuttauji Lea. 



Physa nuttaUli Lea, Pr. A. N. S. P., 1864, p. 116; Jour. A. N. S. P., VI, 



1866, p. 171, pl. 24, fig. 93; Obs., XI, 1866, p. 127, pl. 24, fig. 93. 

 Type locality : Lewis River, Oregon. 

 See ampullacea. 



Physa occid^ntaus Tryon. 



Physa occidentalis Tryon, Am. J. of Con., I, 1865, p. 226, pl. 2, fig. 8. 

 Type locality: San Francisco and numerous other localities in California 

 and Oregon. 



Physa ol,eacea Tryon. 



Physa oleacea Tryon, Am. J. of Con., II, 1866, p. 6, pl. II, fig. 6. 

 Type locality: Bridgeport, Ala., and Lake Superior. 



Is elliptica according to Tryon (132, p. 163). Crandall states (27, p. 45) 

 that Tryon himself admitted this obvious error and considers it to be a var. 

 of gyrina. Baker (5, p. 492) considers it to be simply an immature stage of 

 typical gyrina. 



