98 A. H. Foord — Western Australian Fossils. 



Description of Fossils from the Kimberley District, 1 Western 



Australia. 



By Arthur H. Foord, F.G.S. 



(PLATES IV. and V.) 



I. CAMBRIAN. 



PTEROPOBA. 



Salterella Hardmani (Etheridge, Jun., MS.), sp.nov. Plate IV. 

 Figs. 1, la, 16. 



Several of the tubes of this singular genus are exposed in section 

 on the weathered (water- worn?) surface of a piece of limestone. 

 The tubes are of an elongate conical form, rather rapidly tapering, 

 and straight or slightly curved, the longest about 10 lines; each 

 contains several smaller tubes one within the other, the last of these 

 little hollow cones being the chamber of habitation. The shell is 

 thick, and has consequently not been crushed, two or three of the 

 inner tubes retaining their cylindrical form, as seen in the section 

 Fig. 16. 



The present species is distinguished by its slowly tapering, 

 smooth (?), and nearly straight shell. It most nearly resembles 

 the Salterella pulchella of Billings (Geol. of Vermont, 1861, vol. ii. 

 p. 955; also Palseoz. Foss. (Billings), 1861, vol. i. p. 18), carefully 

 described and figured by Walcott in the Bulletin of the United 

 States Geological Survey, No. 30, 1886, p. 144, pi. xiii. figs. 3, 3a. 



The genus Salterella was regarded by Billings, 2 its author, as 

 " allied to Serpulites,'''' though he considered it " sufficiently distinct 

 therefrom to constitute a distinct genus." He subsequently (Geol. 

 of Canada, 1863, Appendix, p. 949) placed Salterella with the 

 Pteropoda, and was followed in this by Dana (Manual of Geology, 

 1863, p. 187), Barrande (Syst. Sil. de la Boheme, 1867, vol. iii. pt. i. 

 p. 137), and Zittel .(Handbuch der Palasontologie, Abth. i. Lief, ii., 

 1882, p. 315). 



The most instructive observations that have recently been made 



1 The following is Mr. E. T. Hardman's classification of the rocks in this District : — 



AQUEOUS ROCKS. 

 Upper Tertiary. 

 Carboniferous. 



a. Sandstone. 



b. Limestone. 

 Devonian. 



METAMORPHIC ROCKS. 



Volcanic (probably Devonian). 

 Plutonic (Post- Silurian). 



INTRUSIVE. 



See his reports on the Geology of the Kimberley District, "Western Australia (Perth, 

 W. A., 1884 and 1885 ; with lists of fossils, rocks, and minerals, maps and plates). 



2 Palaeozoic Fossils, vol. i. 1861-65, p. 17 (1861). Mr. Billings originally 

 described three species, viz. S. pulchella, S. rugosa, and S. obtusa, but the last is, 

 according to the excellent authority, C. D. Walcott, a species of Hyolithes. 



