52 SAN DIEGO SOCIETY OF NATURAL HISTORY 



Lapworth (Charles). On the discovery of the Oleiielliis fauna in 

 the Lower Cambrian Rocks of Britain. 



Geol. Mag. Dec. 3, vol. 5, 1888, p. 484; also p.l9r), vol. 6, 1889. 



The author remarks: "The remarkable fauna of the Olenellus or lowest Cambrian 

 zone originally discovered in America by Dr. Emmons in 1844 (the Taconic system 

 based on observations in New York, Massachusetts, Maine, Vermont and Rhode 

 Island, Albany, 1844, p. 21, EUiptocephala asnphoides,) was first recognized in Europe 

 b}' the late Dr. Linnarsson in 1871 (Ofversigt af Kongl. \'etenskaps Akad. Forhandl, 

 No. 3, p. 790, Poradoxides Kjrnilfi), in the basal zones of the Cambrian near Lake 

 Mosen in Norway, but its typical genus Olenellus was then referred by him to the 

 allied but more recent genus Paradoxides. 



This reference was corrected by Prof. Brogger in 1875 (CJeol. Forening Stockholm 

 Forhandl., vol. 2, 1875, p. 573), and the various brilliant papers on the primoidilal 

 formations by this author iiave given the Olenellus fauna a marked and peculiar in- 

 terest. 



In 1882 Linnarsson next made known the existence of the Olenellus fauna in Scania 

 at the base of the Swedish Cambrian. In 1886 the same fauna was detected by 

 Mickwitz in the Lower Cambrian of Russia (Esthonia) and this Russian fauna has 

 been lately figured and described by Dr. Schmidt. Dr. Holm has signalized the ex- 

 istence of the Olenellus fauna in the Cambrian of Lapland, where it was detected by 

 Morstell in- 1885. 



The original discovery of the Olenellus zone in Europe was made by Dr. A. G. 

 Nathorst in 1868. This species, Olenellus Kjeriilfi, was named Paradoxides JCahlen- 

 bergi, Torell Petrefacta Suecana from Cambrica, 1869-70, p. 4, but he did not describe 

 or figure the new form; therefore, O. Kjerulfi must be retained for the name of the 

 species. 



Laurie (M.) The Ei]i))ryolog.y of the h?eori)ion. 

 Micr. Sci. Quart. Jour, ser., vol. 31, 1890, pt. 2, p. 105. 

 Euscorpitus italicus. 



On some Euryiiterid remains from the Silurian Rocks of Pent- 



land Hills. 



Trans. Roy. Soc. Edinb., vol. 37, 1892, p. 151. 



Stylonurus nrnafiis nov., S. wnfrophlhalmus nov. Euryptenis Scorpiodes Woodw., E. 

 conicus nov., E. cyclophihalmus no^•. Drepannptrrus pcntlandicus. 



Recent additions to our knowledge of P^iirypterida. 



Nat. Sci., vol. 3, 1893, p. 124. 



The Anatomy and Relations of the Eury})teridae. 



Trans. Roy. Soc. Edinb., vol. 37, 1893, p. 509. 



On some Eurypterid remains from Upper Silurian Rocks of 



the Pentland Hills. 



This author has described in a paper before the British Association, 1892, p. 729, and 

 the Royal Society of Edinburgh between the years 1892 and 1899, Trans, Roy. Soc. 

 Edinb., vol. 38, pt. 1, p. 151, 1893, and vol. 39, 1890, p. 575, four new species to the 

 genus Eurypterus, three to Stylonurus, and makes a new species of Silmonia. He is 

 compelled to make two new genera to receive some more generalized forms. One of 

 these, Drepanopterus, comprising three species, combines characters found in Stylonurus 

 and Eurypterus; and for one species with very generalized characters he makes the 

 genus Bembicosoma. 



