OCT 4 1898 



A Further Cambrian Trilobite from 

 YoRKE Peninsula. 



By R. Etheridge, June., Hon. Fellow, Curator, Australian 

 Museum, Sydney. 



[Read November 2, 1897.] 



Plate n^, figs. 1-3. 



In 1884 Dr. Henry Woodward described"^ two Cambrian 

 Trilobites from the Parara limestone of Yorke Peninsula, to 

 — u:^v. u^ rr.^xTa. fi-ifi na.mpis of Dolichometopus Tatei, and Cono- 



ERRATA. 



pp. 80-89, and legend on Plate iv. (Mollusca) read Plate iv. his. 



p. 145, line 30, read were never seen. 



p. 162, line 12 from bottom insert at after shot. 



pp. 173, 175-8, 181, 183, insert Brockman before Creek. 



p. 217, line 30, read Plate 6 instead of Plate 7. 



It appears that Zenker, in 1833, proposed the name of 

 Conocephalus for a blind Trilobite, previously known as Trilobites 

 Suheri, Schlottheim, and in 1839 Emmrich added a second 

 species termed Conocephalus striatus, but possessing eyes. The 

 incongruity of this appears to have struck Corda, who in 1847 

 pointed out that Conocephalus was, at the time of its enunciation, 

 by Zenker, a preoccupied name, and proposed to substitute for 

 the blind Conocephalus (C. Sulzeri) the name of Conocoryphe, 

 and for the species provided with eyes {Conocephalus striatus) 

 that of Ptychojoaria. Subsequently the illustrious palceontologist 

 Barrande, without separating the two forms, endeavoured to 



* Geol. Mag., 1884, I. (3), p. 343. 



t Trans. R. Soc. S. Austr., 1892, XV., PI. II., p. 187. 



