File 



^ 



[^KTIULE 15.— KXTKACTED FROM TEE BrLLKTIX OF THE U. S. FISD COMMISSION 

 FOR 1890. Pasros HSO to iM. Platrs LXXIX to XCIV.] 



A 



*9CtfclDaJj£ 



CONTRIBUTION TO OUR KNOWLEDGE 



OF TIILv 



Morphology of Lamellibranchiate Mollusks. 



BY 



JATVIKS r.. I^LKLLOGG. 



WASniXOTOX: 



GOYEUXAIKXT PRTNTINrr OFFICE. 

 18*) 2. 



