NOTES ON AUSTRALIAN FOSSILS. 

 By F. Ratte, Ing. des Arts et Manuf., Paris. 



(I.) NOTE ON SOME TRILOBITES NEW TO AUSTRALIA. 



LlCHAS SINUATA (1), n.sp. 



(Plate XV. fig. 15.) 



This beautiful fossil has been disengaged from blocks of lime- 

 stone containing silicified fossils, collected near the Wellington 

 caves. Unfortunately the heads, after having been detached from 

 the stone by the use of hydrochloric acid, fell to pieces, and only 

 a few pygidia remained perfect. The resemblance to L. palmata, 

 Barr., is very strong. (See Barr. Syst. Sil. p. 599, pi. 28, fig. 9, 

 and de Kon. Foss. Pal. Nouv.-Galles, &c. p. 57). 



Lichas palmata is included by Barrande in his "Etage E, Faune 

 III," and in his " Etage D, Faune II," where it formed colonies. 

 In the Wellington limestone our species is accompanied by a 

 small Rhynchonella which is very common, and resembles R. 

 Wilsoni ; and a Spirifer resembling S. elevata more than S. crispa 

 is also very common. 



(1) Since the above was in type, I found in Quart. Journ. Geol. Soc. 

 1850, p. 235, the description of Lichas hirsutus, Fletcher, the pygidium of 

 which is very similar to the Wellington fossil. However, from PI. XXVII, 

 bis, fig. 2, it will be seen that this species is very variable. It is from the 

 Wenloch limestone of Dudley. In consequence of the deep sinuses which 

 our fossil presents at the posterior angle of the lateral spines, considering 

 it a distinct and new species, I suggest for it the name of Lichas sinuata. 



