1872.] ETHEEIDGE aXTEENSLAJ^D FOSSILS. 333 



Ohs. The habit of this species resembles that of the plant Lycopo- 

 dium clavatum. It has affinity with Geriopora (Favosites) serialis, 

 Portl., from the Carboniferous rock of Hook Point, south of Ireland, 

 to which I was inclined to refer it ; but the coenoecium is neither 

 so densely nor so regularly covered with cell-openings as in that 

 species although in habit and bifurcation it is similar. 



Loc. Gympie. Form. Devonian. 



Carboniferous. 

 STKEPTORHTNCHtrs Davidsoki, Ether. PI. XYII. fig. 1. 



Shell nearly semicircular, hinge-line short, not so wide as greatest 

 width of shell ; area small, cardinal angles rounded ; ventral valve 

 nearly flat, or slightly convex, with numerous closely set costse (not 

 so numerous as those upon the surface of the dorsal valve). 



Dorsal valve convex, and strongly ribbed, ribs about twenty-five 

 in number, rounded and depressed, having smaller ribs between each 

 pair of larger ones, the interspaces delicately marked by concentric 

 wavy lines, or striee, which pass over the costse, or ribs. 



06s. This shell difi'ers essentially from the ' British species of 

 Streptorhynchi in the coarseness of its ribbing, or costse, in the more 

 depressed and truncated cardinal angles, and the more pronounced or 

 acute umbonal region. We have no interior for comparison, the 

 specimen described being the only one in our possession ; but it 

 fortunately possesses some of the outer shell. 



This subgenus of Strophomena is seldom well preserved, the cha- 

 racters being generally very indistinct. Only one species {Sp. cre- 

 nistria), with three or four varietal forms, is known in Europe. From 

 their extreme variation the forms of Streptorhynchus have received nu- 

 merous specific names, now all referable to one. Mr. Davidson, F.R.S., 

 has examined the above shell, and cannot refer it to any known form 

 of Streptorhynchus. I therefore, after careful examination, hesitate 

 not to name it after the distinguished naturalist and Brachiopodist 

 whose labours to unravel and elucidate the structure and history of 

 this difficult group have surpassed those of all other writers, and 

 who in readiness to assist those who desire information and know- 

 ledge is surpassed by none. 



Loc. Bowen Eiver and Peak Downs. Form. Carboniferous. 



Strophomena ehomboidaxis, var. anaxoga, Phill. PI. XYIII. fig. 1. 



We have noticed this shell, under the Devonian group, from the 

 Gympie goldfield (pp. 330, 331). 



Loc. Head of Don River. Form. Carboniferous. 



Producttjs longispintts, Sow. Plate XYIII. fig. 9. 



Bef. Min. Conch, vol. i. p. 154, t. 68. fig. 1 ; Dav. Mon. Brit. 

 Carb. Brach., Pal. Soc. p. 154, t. 35. figs. 5-17. 



I cannot detect any difl'erence between this one specimen and the 

 British species ; and Mr. Davidson refers it also to P. longispinus ; our 

 sheU is the inner east of the dorsal valve. 



