OF CONCHOLOGY. Ill 



ties of Terehratella eaurina, (jrld., except by the apophyses, 

 which are not attached, and by the absence of a septum. The 

 foramen is usually larger in this species, in proportion to the 

 size of the shell, and the hinge line usually more curved, but 

 these differences are inconstant. The deltidia in the largest 

 specimen are firmly united, in three or four others they are 

 widely separated. The blood of this species is red. 



This species has been termed Eudesia Grayi by some authors, 

 but as the plaits, which were the characters upon which the 

 genus Eudesia (type Wald. cardium, Val.,) was founded, are 

 inconstant characters and by no means of generic value, I cannot 

 consider the plaited species as sufficiently distinct to deserve 

 separation from the other species of the genus. 



Waldheimia Raphaelis, n. s. Plate vii, fig. a, b, c, d. 



ITab. Japanese coast near Yeddo, R. Pumpelly. Smith- 

 sonian Cabinet, 11786. 



Shell ovate, truncate anteriorly ; beak recurved, produced, 

 somewhat pointed. Foramen complete, moderate ; area large, 

 ill defined ; deltidia united, moderate. Neural valve smooth, 

 obsoletely marked with lines of growth. Anterior edge doubly 

 eraarginate, with the median portion somewhat produced ; with 

 corresponding median emargination and double lateral prolonga- 

 tion of the anterior margin of the haemal valve. The lateral 

 margins of both are nearly straight. 



The hinge-line is greatly arched ; there are no plate-like 

 dental supports ; the shape of the muscular impressions on the 

 neural valve is best shown by the figure. They are proportion- 

 ately smaller than in W. jlavescens. 



The hinge plate of the haemal valve is broad and somewhat 

 excavated between the median line and the hinge teeth. The 

 plate forms a triangular table, so to speak, which lies fiat on the 

 posterior part of the septum. The cardinal process is rhomboidal 

 and stout. The loop is very broad in the reflected portion ; the 

 crura are slender, sharply pointed, and strongly curved at the 

 tips. The septum is about half as long as the valve. 



The color of the shell is a somewhat deep brown with a slight 

 rufous tinge. Externally the valves are conspicuously and regu- 

 larly punctate. The punctures are of an oval shape outside, 

 and smaller, more distant, and circular within. 



This species diff'ers widely from all described recent forms. 

 It is named in honor of the collector, Prof. Raphael Pumpelly, 

 the indefatigable geologist, who has added so much to our knowl- 

 edge of Japan. 



The other recent species of this group are : 



