MARINE SHELLS. 23 
PERIPLOMA. 
Periploma argentaria........... OT maT esaed «0 x2 Uns California 
‘ PETRICOLA. 
Pewieola carditoides.. 72.200... GW tiaiae ic ekee Miaka California 
Petricola pholadiformis......... WEAR A= wis%4. sito) South Carolina 
PHASIANELLA. 
Ebasianella compta.i:. <>... 2<es.: Of Reo A Re ee California 
ss pee ties) rag 10 1) 0 00 (eis ew OY 2) ae a California 
PHOLADIDEA. 
Pholadidea ovoidea........ .... ELD ME ce Bie oS ee ERE California 
Pnoladidea penita. .. oc. 3.2. : Conr. | ei! 
— COUCANIGEALAB oe. ours LET SS OG Sil aaa California 
PHOLAS. 
Parise COntata : . 2s. nc ansaee EGE ea Oe eae Florida 
EWOMAeDACICA: . . 52° eee tere at Stearns..San Francisco Bay, Cal. 
: PHORCUS. 
ipvercus: pulligo....7. saespeas mie TOs Pig esis ahs SY California 
PINNA. 
imme carolinensis. |. gigacr«. >> ISAC) SA aPC ee Florida 
ema UOTICAtA. .. 22a ose IS 2 5 Hoes i as RRR Florida 
ames. .<:.. . . ca. Liga eS Gulf of Mexico 
sd, SEMIN UGS... . <2 eis ees I Aa rte SIS Rn Le ys as Florida 
PLACUNOMIA. 
Placunomia macroschisma...... CSIC srw da pau Tie: California 
PLATYODON. 
Platyodon cancellatum....... SGU gee PRAEE Sece ie California 
PLEUROTOMA. 
Pleurotoma perversa.. 4250... %. CBO ae Saco US. S ™: California 
