PLATE X. 



mi()Cp:ne and pliocenk pectens. 



[t'nU'ss Dthorwisr staled all figures are approxinuilcly luitural size.] 



Page. 



Fiii. ]. Pictn, (rlil(i„H/s) fnniiiiix Dall. U. S. N. M. 164933 t)6 



Exterior of iniiierfi'ct right valve; altitude cS3 mm. Miocene, coast of Strait of Juan 

 de Fuc-a, east of ('lallam Bay, Clallam County, Wash. (M. B. ) 



Fig. 2. Pecten ( Clilaiiu/s) fiianms Dali. U. S. N. M. 107790. I'lastotype 6() 



Cast of exterior of left valve; altitude 81 mm. Same localitv as IIl'. 1. 



Fi(i. 'III. Same specimen as tig. 2 66 



Profile of left valve viewed from front. (M. P.) 



Fi<;. 3. I'lrli'ii (Clilaniiis) inillfti var. iiiornii! n. var. 1'. S. N. !M. l(i-19L'9. Type IL'I 



Fixterior of imperfect right valve; altitude 63 nuu. Lower Pliocene, Moran's place. 

 Priest Valley, Monterey County, Cal. (M. B. ) 



Fio. 4. I'ecten (Chlamijs) iralisi var. inurani n. var. U. S. N. ;\I. 164929. Cotype 121 



Exterior of imperfect left valve; altitude 59 mm. Same locality as fig. 3. 



Fig. 5. Pecten ( ( lilniiii/x) irattsi var. muniiil n. var. V . S. X. M. 164929 121 



Exterior of imperfect left valve; longitude 41 mm. Same locality as fig. 3. 



F^iG. 6. Pecten ( Chlmni/ii) iratt^i var. nieiratii n. var 121 



Exterior of imperfect left valve (young); altitude 30 umi. Same locality as tig. 3. 



164 



