344 OKOLOliY AN'll l'KTl;(>l,OGY OF THE GREAT ^:EI!PEXTINE BELT OF X.S.W.. 



the provisional detciiiiiiiafioii of a shell from Hawdon VaU'. Tu Great Kritain ami 

 Jrelariil this form ranfji's Itetween the zones Si and Dj. 



Pkoductus cf. LOXGlSPixrs (So\verl)_v). 



Jas. Sowerby. Min. Conrili., i., 1814, p. 154, t. 08, f. 1: Davidson. lirit. Carb. 

 Brach., 1858. p. 154, t. 35, f. 5-17. 



This small form is rejireseutetl liy a single pedicle vahe obtained by Benson 

 from four miles east of Currabubula. It is a dejiauperate form. 7 mm. long- and 

 C mm. broad, but otherwise conforms to Davidson's diajj'nosis. The species \va.s 

 provisionally recorded as being found at Greenhills. near Paterson. in 1898. 

 This form is '"present in almost any Carboniferous district where brachiopoda 

 have been found." In Great Britain it ranges from the zone S:; to the zone Di. 



PROi)rcTU.s jiuiucATrs (Phillips). (Plate xxiii.. tigs. 1-3.) 



Phillips, lUus. Geol. York., 183U. t. viii., f. 3; Davidson. P.rit. Carli. Brach.. 18.58, 



!>. 153. t. 32, f. 10-14. 



This shell is sub-circular in outline, the hinge line somewhat shorter than the 

 greatest width of the shell. The [ledicle valve is very evenly rounded so as to give; 

 an almost semicircular profile. It is ornamented by numerous rounded ribs with a 

 small amount of reticulation near the l)eak. This is large and incurved. Except 

 for the absence of spines (and our specimens are only casts), this form agrees 

 closely with Davidson's diagnosis. 

 Dimensions of three forms : 



a h c , 



Breadth in millimetres 18 18 18 



Length from beak to margin 15 18 15 



Convexity !l 7 



This form is remarkably abundant at the soutli-eastern portion of Bahbin- 

 hoon, and was also (■ollect<'d liy Pittman from the "Whale's Egg."»tive miles soutli 

 of Somerton. in 1897, being represented by specimens 1574. 1575. and 1578 in tho 

 collection of the Geological Survey. 



Davidson (31) states that it occurs in the Millstone firit, I'pper ami Lower 

 Limestone Sei'ies of Scotland. In England and Ireland it occurs in the zone of 

 Di. 



PitoorcTus pu.STi'LO.sus (Phillips'). 



Phillii)s, Tllus. Geol. York., ii., 183G, p. 'ilti. t. 7. f. 1-5: Dun. Rec. Geol. Sur. 

 N.S.W., vii., 1002, )). 72. t. 23. f. 1. 2. 3. 4. and Bibliography. 



This form was determined i>rovisionally I'nr this distri<'t on s))ecimens Xo. 

 4579 and 4(il0 in the collection of the Geological Survey, obtained by Cullen trom 

 two miles west of Mt. Uriari These have not been re-examined by us. 



This form is present in the Lower Limestone Series of Scotland (31). ant 

 ranges in England and Ireland from zone Z2 to D2. 



PRODUCTrS! .SEMlRFTlcur.ATtis (Martin). (Plate xix.. tigs. 2-7: 'fexl-tig. 11.) 



Dun. Kcc. Geol. Surv. X.S.W.. vii.. 1902. p. 79. t. 23. f. 4-9. 



A number of examples of this vei'V variable six'cies are figured to show the 

 range of characters Figures 2 and 3. Plate xix . illustrate a form, wjiich we will 



