REPORT ON THE DEPARTMENT OF INVERTEP.RATE FOSSILS (PALEO- 

 ZOIC) IN THE U. S. NATIONAL MUSEUM FOK THE YEAH, ENDING 

 JUNE ;}l), 1881}. 



By C. D. Walcott, Honorary Curator. 



The most important addition is the collection of fossils used in the 

 stndy of the fannas of the JNliddle Cambrian formations of the United 

 States, from the U. S. Geological Snrvey. Many of the specimens are 

 types, and 250 are fignred on the plates accompanying Bnlletin 30 of 

 the U. S. Geological Survey. 



The list of the species in this collection is here presented :* 



Ace. No. Specimons. 



17-147. Archaocyathus allantlcHH, Billiiig.s '^ 



hilUiKjai, Walcott 1 



sp. ? ii 



Ethmophijllumprofandiirn, Billings 4 



rensselwricum , Ford 6 



rarum, Ford I 



whitneyi, Meek 10 



Leptomitus ziiteli, Walcott f> 



rrotospongia fcnestratu, Salter 9 



Strephochetus ? sp. ? 16 



Spougo ? 1 



Oolitic limestone 1 



PliyUofjraphtus ? simplex, 'Emmona <> 



Eocijstites VI Ungidactijlus, Walcott 23 



Eocy stiles 1 ^^ 



Linfjulella clla, H. & W 117 



cwlata, Hall, sp '^'i 



? sp. (Perhaps yonng of L. calaia) 14 



Kutorgina labradorica, Billings 44 



pannula, White (sp.) 17 



prospccteiisis, Walcott 17 



ciufiulala, Billings 112 



cingulata ?? 1 



'. — 1 



Acrotreta gemma, Billings 21? 



Acrothele Huhsidnn, White 77 



Oholella crassa, Hall, sp. (two casts) 43 



gemma, Billings 7 



nitida, Ford ?? 4 



sp.? ^ 



? 1 



* Received from the U. S. Geological Snrvey, through Charles D. Walcott, in charge 



Division of Paleozoic Invert(ibrate Paleontology. 



215 



