PLATE X T. T T I . 



MIOCKXI;, PLIOCENK, ANI» C^rATKKXARY I'ECTENS. 



[riilcss (itlKTwisc sliitL''] Jilt tiLriircs jiri- :i|tiiritximatrly luitiirul size.] 



I'age 



Kici. 1. Pecteu {Clilaiiiiis) hnshii us t<o\\cr]>y vai-. ndnirrluiK Dull. L. S. J. V 112 



Extin-ior of riijht valve; altitiiilc 5(i niiii. Keceiit, I'utret Souml, Washinytdii. (M. P.) 

 Fic. 1((. Same upeeiiuen as fiir. 1 112 



Exterior of left valve. (M. P.) 

 Eici. \h. Same speciiiieu as fijr. 1 112 



Profile of both valves as viewed from the rear. (M. P. ) 

 Fid. 2. Pectin (Clilnnii/s) Imsliiliix Sower])}' var. /((jk/.s/; Carpenter. U. S. N. .M. I."ill22(i Ill 



Exterior of right valve; aUitmle .'iii mm. Recent, southeast .Uaska iV. S, Fish Com. 

 stations 2S50-2851 ). (S. j 

 Kiii. 2(1. Same specimen a.s fig. 2 Ill 



Exterior of left valve. (S. ) 

 Fig. 3. Peclni (Clihiiiii/.')) lidslat us Ho\\\T]iy var. Ii, rli-liis CuniM. V. S. N. M. .SSSl 110 



Exterior of right valve of typical form < if this variety; altitmlc 72 mm. Recent, Pnget 

 Sound, Washington. (M. P.) 

 Fi(i. ,3(1. Same specimen as fig. :> 110 



Exterior of left valve. ( M. P. ) 



230 



