BIBLIOGRAPHY OP PALEOZOIC CRUSTACEA 105 



Shimer (II. W.) Almost coiiipletf spcciiiK'n of HifonuUa sfrenua 

 Hillings. 



Am. Jour. Science, vol. 23, 1907, pp. 199-201, tigiire. 



In the Amer. Jour. Sci., vol. 23, 19o7, p. 319, tlie author refers Ftychoparla miirron- 

 utus Shaler and Foerste, Bull. Mvis. Zool., vol. 16, plate 2, to Strenuella strenua Bill- 

 ings, remarking that it appears that S. siremia is quite variable in the shape of the free 

 cheeks and in the ornamentation of the axis. 



Shuler (E. W.) Ntnv Ordiviciau Kuryptcritl. 



Am. Jour. Sci., vol. 39, 1915, p. 551. 



Stylunurus (Ctenopterus) alveohitus p. ')52, fig. in text 1-6, from the Bay sandstone, 

 Walker's Mt., Virginia. 



The subgeneric name of Ctenopterus was used on account of the long, flattened seg- 

 ments of the endognathite ; the lack of serrations on the segments, such as is found in 

 Kurypterus; the presence of the long joint, belonging probably to the walking leg or 

 balancer characteristics of Stylonurus, and the long, broadened spines or bristles which 

 are especially characteristic of the- subgenus Ctenopterus. 



Siegert (L.) Versteinerungs-fUlu'cndt'n Scdimentii'eseliiehe ini Gla- 

 (•ialdiluviuui des Nordwestliehen ►Saclisens. 



Paljeontologisclies Institut der Univ. Leipzig, 1S98, pp. 37-138. 



Cambrian: Eiiryc/irr latum Ang. Peltiira scanihtwoides W'ahl. S/i/i(ierop/it/uilmus 

 alatus Boeck. 



Silurian: Asaphus expansus Dalm. Clieirurits (Nieszkowskia) -variolaris Lin. Remo- 

 pleurides nanus c. Leucht. A gnostus glahratiis Ang. CJiasinops conicoplillialmus S. & 

 B. lieytithia lostala Lin. (Aiasmops macrounis Sjogren, ('. Jt' esenhergt'nsis Schmidt. 



*Siemiradski (.1. von). Die l*al;i()zis(;lu'n Gcbilde I'odoliciis. ( Not 

 seen.) 



11 PalJiontologischer Teil Wien Beitr. Pal. Cleol., Ost Lng. 19, 1906, pp. 213-286, 

 Taf. xv-xxi. 



Siemiradzki (von Jos.) Die pahi'ozoi.scheii (Jebilde I'odolciis. 

 Beitrage Z. Pal. and Geol. osterr-Ung. u. s. Orients, Bd. 19, Heft 2, vol. 3, 1906, p. 4. 



Six (Aehille). Les appendices des Trilohites d'apres .M. Cli. 1). Wal- 

 cott. 



Soc. Ceol. du Nord, Ann. xi, 1883-84, pp. 228-236. 



Slocum (A. W.) On the Trilohites oT the .AhKiuokda hrds of Fayette 

 ( "ounty, Iowa. 



Field Mus. Nat. Hist., No. 171, (ieol. Ser., vol. 4, No. 3, jip. 43-83. plates 13-18, 1913. 



The author has secured from these beds 20 species of Kichmonilian Tiilobites, 17 of 

 which are here named, 11 of them being new. 



Tiie new genus Cybeloides is also defined. 



The author describes and illustrates the followiiig Crustacae: 



Isotelns gigas DeKay, /. maximus Locke, with the remark that most of the specimens 

 of Isotelus from this locality, which have been referred by other authors to /. maximus, 

 are here referred to Isotelus loivenis Owen. 



Isotelus loivensis Owen. Megalaspis lieckeri sp. nov. Compares M. gonioceras .Meek 

 and M. extenuaia Angelin. 



Nileus vigilarts Meek and W'ortlien. Huinaslns lieiker't sp. nov. Tlialeops ovata 

 Conrad. A mpliilichas rlilnoi eras sji. nov., /. < lennonlensis ^p. no\'. 



