BIBLIOGRAPHY OF PALAEOZOIC CRUSTACEA. 69 



On additional embryonic forms of Trilobites 



from the Primordial rocks of Troy, New York, with 

 observations on the genera Olenellus, Paradoxides, and 

 Hydrocephalus . 



In Am. Jour. Sci. 3d series, vol. 22, 1881, p. 2.50, 13 figs. 



< Henellus asaphoides Emm. Paradoxides spiuosiis Boech, P.pimlhtsBsLvr., 

 P. inflatus Cord., P. tessini Brong., P. kjerulfi Linrs. Hydrocephalus carens 

 Barr. Olenellus thompsoni Hall, 0. vermontanus Hall. 



and Dwight (W. B.) Preliminary report of 



S. W. Ford and W. B. Dwight upon fossils obtained in 

 1885 from metamorphic limestones of the Taconic series 

 of Emmons, at Canaan, New York. PL 7. 



In Am. Jour. Sci., .3d series, vol. 31, 1886, p. 248. 

 Genal spine of Trilobite, perhaps Asaphns megistos. 



Freeh (Fritz). Ueber das Devon der Ostalpen. 



In Zeitschr. Deutsch. geol. Gesell., Berlin, vol. 39, 1888, p. 659. 



Phacops grimhurgi n. sp. Cheirurus quejistedti Barr., C. quenstedti mut. 

 uov. precursor. Encrinurus novaki n. sp. Encrhiurus sp. ? Arethusina 

 haneri n. sp. 



Die palaozoischen Bildungen von Cabrieres, 



etc. 



In Zeitschr. Deutsch. geol. Gesell., Berlin, vol. 39, 1887, p. 360, pi. 24. 



Bronteu.s meridionalis Trom. Grass,, B. rouvillei n. sp., B.suhcampanifer 

 n. sp., B. dormitzeri ? Phacops fecundus Barr., P. fecundus mut. nov. 

 snprade vonica, P. occitanicus Trom. & Grass., P. escoti n. sp., P. cf. 

 lair-septatus . Cheirurus gibbus. Lichas meridioiialisn.s'p. Proetns cuvieri ?, 

 P. romplaiialus var. P. aff. p/lanicauda' . Harj>es rouvillei u. sp. 



Gehler (J. C.) De quibusdam rarioribus agri Lipsi- 

 ensis petrifactis. Spec. I. Trilobites f. Entoiuolithus 

 paradoxus Linne. LipsicC, 1793 (1 pi.) 



The author gives a sketch of the bibliography of the Trilobites, and fig- 

 ures several specimens of C'alymene blnmcnbachli. 



Geinitz (H. B.) Grundriss der Versteinerungs-Kunde. 

 Dresden, 1846, 28 pis. 



The Trilobites are arranged into 19 families, as follows: 

 1. Calymene Brong. ('.47«;>A/oH and Zc^Aks Pander). C. bhtmnnhachii, 

 C. tristaiii, C. piobjtomu, C. rallicephala. 



