578 ORTMANN— NAYADES OF 



and Holston R.) ; spams (Swamp Cr., Whitfield Co., Ga.), and I am 

 fully convinced that all these actually are synonyms of nehulosus. 

 But I believe that there are many others, and on account of the ex- 

 traordinary size of the list of synonyms, I think it advisable to make 

 a few remarks as to these. 



U, creperns Lea, '38 (Tennessee), made a synonym of L. iris 

 (Lea) by Simpson (p. 115), is founded upon an old half shell, 

 hardly recognizable, but it may be this. In the Walker collection is 

 a specimen from Clinch R., Va. (Wright), labeled creperns, which 

 is distinctly E. nehidosa. It is a male, has purple nacre, and distinct, 

 rather broad, only slightly interrupted rays. 



U. dispansus Lea, '71 (east Tennessee), has been put by Simpson 

 (p. 106) in the synonymy of L. vaniixemensis; I think it belongs 

 here. 



U. puniceiis Haldeman, '42 (Simpson, p. 104) (Holston R., 

 Washington Co., Va.). I have found forms corresponding to the 

 description in the same region (topotypes), and they simply are E. 

 ncbulosa with a peculiar reddish-orange nacre. 



U. obscura Lea, '38 (Nashville, Tenn.), and U. aelglerianns Lea, 

 '38 (Cumberland R., Tenn.), made synonyms by Simpson (p. 117) 

 are also this, with rather fine, uninterrupted rays, and purple nacre. 



U. fatuus Lea, '40 (Holston R., Tenn.), and U . dactylus Lea, '40 

 (Caney Fork R., Tenn.), made synonyms by Simpson (pp. 116, 117), 

 are rather elongated and unusually swollen forms oi E. nebulosa, 

 with the rays less developed, and not interrupted. 



U. planicostatus Lea, '60 (Tuscumbia, Ala.) (Simpson, p. 117). 

 A strongly compressed male, with rays distinct, rather wide, and little 

 interrupted. Such specimens are frequent, chiefly in the Clinch. 



U. muehlfeldianus Lea, '38 (Cumberland R., Tenn.) (Simpson, 

 p. 121). According to Simpson, only a single specimen is known, 

 which is undoubtedly this, probably a female. Pilsbry & Rhoads 

 give this also from Watauga R., near Johnson City, Washington Co., 

 Tenn.: near this place (Watauga, Carter Co.), I have found E. 

 nebidosa. 



U. amwnus Lea, '40 (Holston R., Tenn.) (Simpson, p. 122). A 

 typical female of E. nebulosa. 



U. teller Lea, '40 (Big Pigeon R., Tenn.) and U. regularis Lea, 



