1158 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Shumardia glacialis Billings. 



Shumardia glacialis Billings, Pal. Foss., 1, Geol. Surv. Canada, 1865, p. 283, 



fig. 270. 

 Canadian (Quebec — P): Portland Creek and Pistolet Bay, Newfoundland. 



Shumardia granulosa Billings. 



Shumardia granulosa Billings, Pal. Foss., 1, Geol. Surv. Canada, 1865, p. 92, fig. 



83a, b (adv. sheets, 1862).— Miller, N. A. Geol. Pal., 1889, p. 566, fig. 1057. 

 Canadian (Levis, Diplograptus dentatus zone): Point Levis, Quebec. 



Shumardia pusilla (Sars). 



Battus pusillus Sars, Okens Isis, 1835, p. 333, pi. 8, fig. 2. 



Conophrys pusilla Brogger, Die Sil. Etagen 2-3, 1882, p. 125, pi. 12, fig. 9 (cites 



bibliography).— Reed, Geol. Mag., dec. 4, 5, 1898, p. 501. 

 Shumardia pusilla Moberg, Afh. Sveriges Geol. Unders., Ser. C, No. 109, 1S90, 



p. 4, figs, a-c— Freeh, Leth. geog., 1 Th., Leth. Pal., 2, 1 Lief., 1897, 



pi. lb, fig. 13. 

 Canadian: Europe; Point Levis, Quebec (Levis, Diplograptus dentatus zone) 



[Raymond]. 



Sicyocrinus Angelin. See Botryocrinus Angelin. 



Sidemina Castelnau. Genotype: S. infundibiiliformc Castelnau. 



Sidemina Castelnau, Essai Syst. Sil. l'Amerique Septent., 1843, p. 33. 



Sidemina infundibuliiorme Castelnau. 



Sidemina infundibuliforme Castelnau, Essai Syst. Sil. l'Amerique Septent., 



1S43, p. 33, pi. 10, fig. 1. 

 Silurian: Little Manitoulin Island, Lake nuron. 



Observation. — Not recognized. ' Probably fragment of an Endoceras. 



Siderocrinites Troost. See Siderocrinus (Troost) Wood. 



SIDEROCRINUS (Troost) Wood. Genotype: S. ornatus Troost. 



Siderocrinites Troost, MS., 1850. 

 Siderocrinus Wood.. Bull. II. S. Nat. Mus., 64, 1909, p. 104. 



Siderocrinus ornatus (Troost) Wood. 



Siderocrinites ornatus Troost, MS., 1850. 



Siderocrinus ornatus Wood, Bull. U. S. Nat. Mus., 64, 1909, p. 105, pi. 12, fig. 7. 



Niagaran (Brownsport) : Decatur County, Tennessee. 



Holotype.— Cat. No. 39935, U.S.N.M. 



Sieberella (Ehlert. See Gypidula subgenus Sieberella GShlert. 



Sigmacystis Hudson. See Canadocystis Jaekel. 



SIGMAGRAPTUS Ruedernann. Genotype: S. precursor Ruedemann. 



Sigmagraptus Ruedemann, Mem. New York State Mus., 7, pt. 1, 1904, pp. 701, 

 702. 



Sigmagraptus precursor Ruedemann. 



Ceenograptid Ruedemann, New York State Pal., Ann. Rep., 1902, p. 566. 

 Sigmagraptus precursor Ruedemann, Mem. New York State Mus., 7, pt. 1, 1904, 



pp. 702, 703, pi. 5, figs. 13, 14; fig. 93. 

 Canadian (Deep kill, Didymograptus bifidus zone): Deepkill, Rensselaer County, 



New York. 



