] 54 E. S. Cobbold — Cambrian Hyolitliidm from Hartshill. 



Saltekella, Billings. 



Salterella (?) curvata, S. & F. (PI. IV, Pigs. 16«, b.) 



Salterella curvatus, S. & F., Bull. Mus. Comp. Zool. Harvard, vol. xvi, 



p. 34, pi. ii, fig. 22, 1888. 

 Walcott, Tenth Ann. Eep. U.S. Geol. Surv., 

 p. 625, pi. lxxix, figs. 3, 3a, 1890. 

 ,, ,, ,, Grabau, Occ. Papers Boston Nat. Hist. Soc, 



vol. iv, p. 660, pi. iii, 1900. 



Two specimens on one block [38] in the collection suggest a 

 reference to Shaler and Foerste's species ; they lack, however, the 

 cone-within-cone structure of shell that characterizes the type species 

 for the genus Salterella rugosa. They are curved tapering tubes with 

 a rounded or somewhat oval section, scarcely three millimetres long 

 and less than one mm. in diameter. The aperture is not seen, the 

 open ends being fractured. The shell is thick; its outer surface is 

 smooth but marked near the apex with very faint transverse striae 

 spaced about eight to the millimetre. The interior is also smooth, 

 and though filled with calcite shows no trace of annulations or 

 septal divisions. The rate of taper is about 1 in 4, equivalent to an 

 apical angle of 14°. 



Horizon and Locality. — Lower Cambrian : the red sandy limestone 

 of Woodlands Quarry, Hartshill. 



COLEOLOIDES, Walcott. 



Coleoloides typicalis, var. multistriata, var. nov. (PI. IV, Figs. 30, 32.) 



Coleoloides typicalis, Walcott, U.S. Nat. Mus. Proc, vol. xii, pi. xxxvii, 1889. 

 ,, ,, ,, U.S. Geol. Surv., Tenth Ann. Eep., p. 624, 



pi. lxxix, figs. 6, 6a, 1890. 

 ,, ,, ,, Lapworth, Proc. Geol. Assoc, vol. xv, pt. ix, 



p. 343, 1898. 



Straight tubes of circular section with very slight taper are 

 plentiful in the rock specimens to hand, but very rarely preserve the 

 original surface. 



In two instances [15 and 38], however, the external surface marks 

 are perceptible : they are very closely set spiral lines, numbering 

 about seventy in the whole circumference of the tube, which is one 

 millimetre in diameter ; they are inclined at such an angle as to make 

 one complete circuit of the tube in a length equal to about 

 10 diameters. 



C. typicalis, Walcott, as figured, has much fewer spiral lines and 

 they are set at a more acute angle. 



The tubes vary in diameter from 1 to l - 3 millimetres. 



Horizon and Locality. — Lower Cambrian : red sandy limestone of 

 Woodlands Quarry, Hartshill. 



BRACHIOPODA. 



Micromitea (Meek), Walcott. 



Micromitra cf. Phillipsi, Hall, sp. (PI. IV, Fig. 25.) 



Obolella Phillipsi, Holl, Q.J.G.S., vol.'xxi, p. 102, figs. 10a-c, 1865. 

 O. (?) Phillipsi (Holl), Davidson, Pal. Soc. Mon. British Fossil Brachiopoda, 

 vol. iii, pt. vii, p. 62, pi. iv, figs. 17-19, 1866. 



