656 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



44096. Thamniscus dubius (Schlotheim). Figured sections of 



plesiotype. 

 Permian. Poesneck, Germany. 



Ulrich, Geol. Surv. 111., VIII, 1S90, p. 606, pi. 62, figs. 10, 10a. 



43364. Thamniscus furcillatus Ulrich. Cotype. 



Chester (Miss.) Near Chester, Illinois. 



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



43363. Thamniscus ramulosus Ulrich. Cotypes. 



Chester (Miss.) Sloans Valley, Kentucky. 



Ulrich, Geol. Surv. 111., VIII, 1890, p. 610, pi. 62, figs. 4-4)3. 



43801. Thamniscus ramulosus sevillensis Ulrich. • Cotypes 



and figured sections. 

 Lower Coal Measures. Seville, Illinois. 



Ulrich, Geol. Surv. 111., VIII, 1890, p. 610, pi. 55, fig. 6 (on page 

 as T. sevillensis). 



43365. Thamniscus sculptilis Ulrich. Cotype. 



Keokuk (Miss.) Kings Mountain, Kentucky. 



Ulrich, Geol. Surv. 111., VIII, 1890, p. 608, pi. 62, figs. 8, 8b. 



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



and paratypes. 

 Laramie (Cret.). Opposite mouth of Yellowstone River, 

 North Dakota. 



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

 figs. 8a-d. 



1181. 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 gregarius. 



1181. 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 1861, p. 436; 

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



= Hyolithes gregarius. 



3621. Theca lanceolata Morris. Plesiotypes. 



Carboniferous. Black Head, Illawarra, New South Wales, 

 Australia. 

 Dana, Wilkes U. S. Expl. 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, pi. 45, figs. 23, 24. 



