6 SAN niRCO SOCIETY OF NATURAT. TTISTORV 



The First Centuria has only S plates and 100 figures accompanied by descriptions. 



The Second Cenlmia, consisting of plates 9-lS, figures 101-24S, was issued without 

 text descriptions. 



Koenig gives the name of lielinurus hi'Uulus to fig. 230, without a description of the 

 new genus. 



Frcdwichia (Uiflira.r and Bdiiiunis ]ii))ahi.<; from Spartli Bot- 



toms, Eochdale. 



Trans. Manchester Geol. Soc. vol. 39, 1904-1905, pp. 124-127, witli 2 figures. 



The author figurv;s Prest-Liii liiu anthrax described under the name of Litnulus an- 

 thrax by Prestvvich in 1840, and refers to Beliniirus litnatiis Konig's Belinurus bfllulus. 



The author remarks, that it certainly is not a fossil insect, as indicated by Martin 

 in Petrifacata Derbiensia, pi. 45, fig. 4, 1809. 



Bather (F. A.) Haffx.^ hucro. A new Silurian Trilobite I'rom the 

 Carnie Alps. 



Catania Rivista Italiana di Palxont., 1910, 7 pp., ligure. 



The trivial name bucco alludes to the .>wollen cheek roll, which with its ornament 

 is so marked a character to the species. 



Barth (Hermann von). Die Stcllnng' Jer Trilol)iten in Zoolooisehen 

 System e. 



Das Ausland 26 Jahrg, 1875, p. 25. 



The author quotes Billings's paper; also that of Dana on the feet of Trilobites, and 

 refers to the discoveries of E. von Eichwald in W^esenberg in Estland, and in the 

 Island Dago near Hohenholm. 



N. Jahrb fiir Mineral, and Geol. vol. 1, 1875. 



Barton (Donald C.) A new genus of the Clieiruridae with descrip- 

 tions of some new species. 



Bull. Mus. Comp. Zoology, vol. LIV, No. 21, 1913, with one plate. 



The new genus Ceraurinus is like i'heirurus insii^nis Beyrich in size. 



The glabella is subrectangular or expanded only slightly. The posterior of the 3 

 pairs of glabellar furrows are straight, about one-third the width of the glabella in 

 length, and slope gently backwards. 



Their inner ends are connected with the neck furrows by curving constrictions, 

 which are about parallel to the axis of the glabella. 



The constrictions are strong in some species and flat in others. 



The middle part of the axial , portion of the neck furrow is parallel to the posterior 

 edge of the neck segment. 



The eyes large. 



Thorax 11 segments, presumably. 



Pygidium only in C. icariis Billings, three to four segments ending in six free spines 

 of equal length. 



Type (Ceraurinus marginatus sp. nov. 



The author includes in the genus C. icarus Billings, C. trenlonrnsis, sp. nov., Cry- 

 tometopus scofieldi Clarke, Cheirurus polydorus Billings, and C. I'ompilius Billings. 



He refers ICeraurus meekanns Miller, 1889, to C. icarus Billings. 



The paper ends with a fragment, described as Ceraurinus confluens, n. sp. 



A revision of tlie C'iieiruninae with notes on their evolution. 



Washington Univ. Studies, vol. 3, part 1, No. 1, 1915. 



