TRANSACTIONS OF WAGNER 



7OO 



TERTIARY FAUNA OF FLORIDA 



The type specimen of this species is also in the National Museum, and 

 it is much closer to P. cauriinis than the last species. It has twenty ribs and, 

 except that it is somewhat more convex, closely resembles P. cauriinis in 

 every respect when of the same size. The latter, however, has not yet been 

 found in the succeeding Pliocene deposits, though present in the fauna of 

 Puget Sound. Conrad's figure is a mere caricature. 



vyC Pecten (Patinopecten) coosensis Shumard. 



PLATE 26, FIGURE 2. 



Pecten coosensis Shumard, Trans. St. Louis Acad. Sci., L, pt. 2, p. 122, 1858. 

 P. coosacmis Meek (err. typ.), S. I. Mioc. Checkl., p. 3, 1864. 



Miocene of the Empire beds (Astoria horizon) at Coos Bay, Oregon ; 

 Shumard and Dall. 



This species is large, compressed, with twenty-nine to thirty-one squarish 

 prominent ribs, and on the upper valve much wider interspaces crossed by fine 

 incremental lines. The ribs are sometimes longitudinally grooved towards the 

 base. Specimens are in the National Museum and measure in alt. 120, lat. 

 113, and diam. 27 mm. This fine species is very abundant in the locality 

 indicated. It is nearest to the Pliocene P. cxpcinsiis Dall, in which the ribs are 

 dichotomous. 



sL Pecten (Chlamys) altiplicatus Conrad. 



/'i-f/i-ii altiplicatus Conr., Pac. R. R. Rep., vii., p. 191, pi. 3, fi^. 2, 1857. 

 I'fftcit altiplectits Conr. (err. typ.), I'roc. Acad. Nat. Sci. Pbila. for 1856, p. 313, 1857. 

 J'i-( /i->i licriceus Carpenter, Cooper ; not of C.ould. 



Miocene of the San Rafael hills near Santa Barbara, California ; W. P. 

 Blake. 



This species, which is wretchedly figured by Conrad, is represented by 

 the type in the National Museum. It has ten or eleven high, sharp spinulosc 

 ribs alternated with an equal number of low, small imbricate riblcts, the inter- 

 spaces sculptured with elevated radial scabrous threads. The beak and cars 

 are defective, but the typical specimen is characteristic enough to show that it 

 is entirely distinct from the recent Pecten licricms Gould, with which it has 

 often been doubtfully united. 



P. catillifonnis Conrad (pp. cit., v., p. 329, pi. 9, fig. 83, 1856), which 

 resembles in the figure a flattened valve of P. Hcennanni seen from within, 

 and /-*. iicvadainis Conrad (pp. cit., p. 329, pi. 8, fig. 77) were described from 

 drawings made by Professor W. P. Blake from internal or external casts in the 



