THE NATURAL HISTORY SURVEY. 393 



Phil. Acad., Vol. V, p. 131, 1825, and must displace that of Lea 

 published in 1834. 



p. 71. 

 iia. Unio gibbosus delicatus Simpson, pi. xv, figs. 2, 4. 



Unio gibbosus var. delicatus SIMPSON, Proc. U. S. Nat. Mus., Vol- 

 XXII, p. 704, 1901. 



Differs from typical gibbosus in being thin, greatly com- 

 pressed andwith an evenly elliptical outline and very dark nacre. 



p. 74- Anodontoides subcylindraceus is a variety of ferussaci- 

 anus. 



p. 79. Quadrula cocciuea should be credited to Conrad, who 

 described it in his monograph, p. 29, pi. xiii, fig. I, in 1836. 

 Lea's name not appearing until June 15, 1838. (Vide Simpson, 

 in letter.) 



p. 80. Quadrula plicata Lesueur should be credited to Say, 

 who really described the species. (Unio plicata Say, Nich. 

 Encyc., Vol. II, pi. iii, fig. I, 1816.) 



p. 85. Quadrula verrucosa Barnes should be called Quad- 

 rula tuberculata Rafinesque, the reference being Obliquaria (Ro- 

 lundarid) tuberculata RAF., Ann. Gen. Sci. Brux., Vol. V, p. 103, 

 1820. 



p. 100. The following species is distinct from a?wdontoides, 

 which is figured on plate x, figs. I, 2. 

 150. Lampsilis fallaciosus (Smith) Simpson, pi. x, fig. 3. 



Lampsilis fallaciosus SMITH, Bull. U. S. Fish Com., 1899, p. 291, pi. 

 Ixxix. 



Figured and name given, but not described nor authority given. 

 Lampsilis fallaciosus (Smith) SIMPSON, Proc. Phil. Acad., p. 74, pi. ii, 

 fig. 5, 1900. 



"Shell elongate elliptical, subsolid, inflated, rounded in 

 front, and ending in a rather sharp point behind, at two-thirds 

 the height of the shell, with a moderate, rounded posterior 

 ridge; beaks not prominent, their sculpture consisting of a few 

 delicate parallel ridges, somewhat doubly looped, the hinder 

 loops generally open behind; epidermis very smooth and shin- 

 ing, ashy straw color, often brownish on the back of the shell, 

 generally feebly rayed with green; female shell decidedly 

 swollen in the postbasal region, so that the base line is often 

 incurved in front of the swelling; teeth rather delicate, there 

 being one compressed pseudo-cardinal and one lateral in the 

 right valve, and two pseudo-cardinals and two laterals in the 

 left; beak cavities not deep; nacre brilliant, silvery." 

 "Length, 90; height, 40; diameter, 32 mill." 



