THK NAUTILUS. 



A NEW UNIO FROM TEXAS. 



r.y BERLIN IT \VI:K;HT. 



II. Iheringi. *\<. nov. 



Shell sub-plicate or slightly folded on the posterior slope and 

 forward over the uinbonal area, sub-quadrate; substance of the 

 shell rather thick and uniform ; beaks prominent, small, angular, 

 and ornamented with three or four doubly looped and corrugated 

 ridges; epidermis yellowish green to very dark red and nearly 

 covered with coarse faint green rays ; teeth solid, remarkably 

 smooth, single in the right and double in the left valves; cicatrices 

 almost confluent, smooth and well impressed ; cavity of the beak 

 moderate ; nacre a clear, lustrous white. 



Diam. 1, length (height) H, width 3 inches. 



Habitat. San Saba River, Menard Co., Texas. 



Type in National Museum. 



REMARKS. This species was discovered by Mrs. John Alex. 

 Smith, of Meuardville, Texas, who found it in company with N. 

 coloracloensis, Lea, houstonensis, Lea, gracilis, Bar. (?) tuberculatus, 

 Bar. petriuus, Gd., pauciplicatus, Lea, speciosus, Lea, anodon- 

 toides, Lea, and An. undulata, Say? Its affinities are with I . 

 piiciferus, Lea and U. Mitehellii Simpson.. It differs from the first 

 in being less rayed, lighter epidermis, white nacre, sharper umbonal 

 angle, and more produced posterior dorsal margin, and lower and 

 flatter umbo. From the latter it differs in the beak sculpture, 

 which in Mitehellii is coarser and not looped, sharper umbonal 

 ridge, higher umbo, more generally folded, and in being rayed. 



It gives us great pleasure to name this species in honor of Dr. H. 

 von Ihering, Director of the Museum Paulista, Sao Paulo, Brazil, 

 who has done so much valuable work iu many departments ot 

 Natural Science. 



To Mr. Charles T. Simpson, of the National Museum, I am in- 

 debted for his comparisons with the type of his species. 



RECENT PUBLICATIONS RECEIVED. 



THE JOURNAL OF CONCHOLOGY VOL. IX, No. 3, JULY AND 

 OCTOBER. 1898. Additions to " British Conchology " (continued) 

 By J. G. Marshall ; "The Marine Mollusca of Madras and the 



