656 r.ULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



44096. Thamniscus dubius (Sclilotheim). Figured sections of 



plesiotype. 

 Permian. Poesneck, Germany. 



Ulrich, Geol. Siirv. 111., VIII, iSgo, p. 606, pi. 62, figs. 10, loa. 



43364. Thamniscus furcillatus Ulrich. Cotype. 



Chester (Miss.) Near Chester, Ilhnois. 



Ulrich, Geol. Surv. 111., VIII, 1890, p. 609, pi. 62, iigs. 9, 9b. 



43363. Thamniscus ramulosus Ulrich. Cotypes. 



Chester (Miss.) vSloans Valley, Kentucky. 



Ulrich, Geol. vSurv. 111., VIII, 1890, p. 610, pi. 62, figs. 4-4^J- 



43801. Thamniscus ramulosus sevillensis Ulrich. Cotj^pes 



and figured sections. 

 Lower Coal Measures. Seville, Illinois. 



Ulrich, Geol. vSurv. 111., VIII, 1S90, p. 610, pi. 55, fig. 6 (on page 

 as T. sevillensis). 



43365. Thamniscus sculptilis Ulrich. Cotype. 



Keokuk (Miss.) Kings Mountain, Kentucky. 



Ulrich, Geol. vSurv. 111., VIII, 1S90, p. 608, pi. 62, figs. 8, 8b. 



21 1 1. Thaumastus limnaeformis (Meek and Hayden). Holotype 



and paratypes. 

 Laramie (Cret.). Oppo.site mouth of Yellowstone River, 

 North Dakota. 



Meek, Rept. U. S. Geol. vSnrv. Terr., IX, 1876, p. 553, pi. 44. 

 figs. ba-d. 



1 181. Theca gregaria (Meek and Hayden). Cotypes. 



Upper Cambrian. Near head of Powder River, Big Horn 

 Mountains, Wyoming. 



Meek and Hayden, Pal., Upper Mo., Smithsonian Cont. to 

 Knowl., No. 172, XIV, 1864, p. 5, text figs. a-d. 



= Hyolithes gregaritis. 



1 181. Theca ( Pugiunculus ) gregaria Meek and Hayden. Cotypes. 

 Upper Cambrian. Near head of Powder River, Big Horn 

 Mountains, Wyoming. 



Meek and Havden, Proc. Acad. Nat. Sci. Phila., for 1S61, l).436; 

 Am. Jourii. Sci. (2),'XXXIII, 1862, p. 73, fig. 3. 



= Hyolithes gregarius. 



3621. Theca lanceolata Morris. Ple.siotypes. 



Carboniferous. P>lack Head, Illawarra, New South Wales, 

 Australia. 

 Dana, Wilkes U. S. lixpl. Exped., X, 1849, p. 708. 

 = Hyolithes lanceolatus. 



155767. Thecodonta? ( Dicranodesma) calvertensis Glenn. 



Plesiotype. 

 Miocene. Plum Point, Maryland. 



Dall, Trans. Wagner Free Inst. Sci. Phila., Ill, Pt. V, 1900, p. 

 1157. pl- 45. figs- 23, 24. 



