TYPE SPECIMENS OF INVERTEBRATE FOSSILS. 59 



14688. Archseocyathus atlanticus Billings. Plcsiotypcs. 



15301. Lower Cambrian. L'Ansc an Loup, Lalirador and vSilver 



Peak, Nevada. 



Walcott, Bull. Xo. 31), r. S. (reol. Surv., 18S6, p. 73, pi. 3, lig.s. 

 I -2a. 



= Spirocvathu.s atlanticus. 



15302. Archaeocyathus billingsi Walcott. Holotype. 



Lower Cambrian. L'Anse au Loup, Labrador. 



Walcott, Bull. No. 30, U. vS. Oeol. vSurv., 18.S6, p. 74, pi. 3, figs. 

 3-3C. 



= Coscinocyathus billingsi. 



18352. Archaeocyathus i Archaeocyathellus ) dwighti Walcott. 



Cotype. 

 Lower Cambrian. Trov, and Washington covnitv. New 

 York. 



Walcott, Proc. U. vS. Nat. Mus., XII, 1SS9, p. 34; Tenth Ann. Rept. 

 I'. S. Geol. Surv., 1890, p. 601, pi. 54, figs. 4, 4a. 



15304. Archaeocyathus profundus (Hillings). Plesiotype. 



Lower Cambrian. L'Anse au Loup, Labrador. 



Walcott, Tenth Ann. Rept. U. S. Geol. Surv., 1890, p. 600, pi. 52, 

 figs, i-ic; pi. 53, fig.s. i-ib; pi. 54, fig. 3. 



vSce Ivthmophvllum profnndum. 



15306. Archaeocyathus 1 Archaeocyathellus ) rarus (Ford). 



Plesiotype. 

 Lower Cambrian. Troy, New York. 



Walcott, Tenth Ann. Rept. U. S. Geol. ,Surv., 1890, p. 601, pi. 54, 

 figs. 2, 2a. 



vSee Kthmoplnilum rannn. 



15305. Archaeocyathus I Archaeocyathellus irensselaericus(Ford). 



Ple.siot3-pes. 

 Lower Cambrian. Troy, New York. 



Walcott, Tenth Ann. Rept. U. vS. Geol. Surv., 1890, p. 600, pi. 54, 

 figs. i-ie. 



See Pvthmoplnilum ren.s.selaericum. 



43416. Archimedes communis I'lrich. Cotypes. 



Chester f Miss. ). vSloans X'alley. Pulaski County, Ken- 

 tuck3\ 



Ulrich, Geol. Surv. 111.. \'III, 1890, p. 573, ])1. 63, figs. i-id. 



43736. Archimedes compactus Ulrich. Cotypes. 



Chester (Mi.ss.). Sloans Yalley, Pulaski County. Ken- 

 tucky. 

 Ulrich, Geol. ,Surv. III., \'III, 1890, p. 572, pi. 63, figs. 2, 2a. 



44097. Archimedes distans Ulrich. Cotypes. 



Chester (Miss. ). Chester, Illinois. 



Ulrich, Geol. Surv. 111., VIII, 1890, p. 578, pi. 63, figs. 9-9b. 



