214 



yellowish gritty sandstones are of common occurrence, and in 

 these Mr. James Smith, Mr. Thomas Hainsworth, and the 

 writer have at various times obtained specimens containing 

 impressions of several species of brachiopods apparently 

 identical with forms occurring in the limestones and gritty 

 sandstones of the Gordon and Queen Eiver Groups. These 

 conglomerates have been described by the writer in the Pro- 

 ceedings of the Eoyal Society of Tasmania, 1876, pp. 86-87, 

 and they extend, somewhat interruptedly, reposing uncon- 

 formably upon a more or less vertically inclined slate forma- 

 tion, along the coast between Table Cape and the Penguin. 

 In these localities they usually form dangerous reefs along 

 the coast line. They have evidently been subjected to great 

 denudation, and this may account for this irregular and 

 interrupted distribution. It is difficult to determine the 

 species, as the specimens or casts are fragmentary or imper- 

 fect. Fortunately, a number of these fossils were submitted 

 by Mr. T. Stephens, and also by the writer, to Mr. Eobert 

 Etheridge, jun., of the British Museum, who described and 

 figured the more conspicuous forms in a paper submitted to 

 the Eoyal Society of Tasmania in the year 1882. — (See Proc. 

 Eoy. Soc. Tag., 1882, pp. 150-163 ; Plate II., figs. 1-16). _ The 

 prevaling form is a species of Pentamerus, closely allied to 

 P. Knightii (Sby.), and described as P. Tasmaniensis (PI. II., 

 figs. 1 and 3-8) by Mr Etheridge, jun. The associated forms 

 also commented and described by the same authority are as 

 follow : — 



1. Spirifer, resembling S. plicatdla (Linn.) (Figg. 9, a-c.) 



2. Spirifer, or Orthis, " possessing the usual ribs and a smooth 

 mesial fold." (PL II., fig. 2). 



3. Spirifer, " not unlike S. crispa (His.) or S. elevata 

 (Dalman)." (Fig. 9-t>.) 



4. Orthis, well marked, "a ventral valve with but few ribs, 

 and those coarse and strong," resembling OMforata 

 (Schlothiem.) (Fig. 16.) 



5. Strophornena 1 fragment of a shell. (Fig. 11.) 



6. Spirifer ? or Atrypa 1 (Fig. 10.) 



7. Tentactdites ; cast. (Fig. 13.) 



8. Internal cast of a bivalve, undetermined. (Fig. 15.) 



Besides these I have in my possession other forms from the 

 conglomerates, resembling the following species : — ■ 



Orthis alternata. 



Orthis fiabellum. 



Orthis elegantula ( Dalman ). 



Rhynchonella nasida ( M'Coy). 



Atrypa hemispherica ( J. de C. Sow). 



