290 Professor Bonney — Specimens from the Canadian Rockies. 



a rather more flaky yellowish grey material can be detected in the 

 interstices between them they may have been bored in that material. 



(2) Another quartzite slab, roughly oblong, on the average about 

 5y by 4" and a little thinner, with a slightly more ferruginous 

 coating, has practically identical 'burrows' (Fig. 1). On the 

 underside of each is a rather ferruginous coating or glaze, with 

 some indications of burrows. The material resembles the basal 

 Cambrian quartzite of North- West Scotland in which worm-burrows 

 occur, named ScolitJius, and figured by Hall,^ as found there and at 

 the Stiper Stones.^ Nicholson^ refers the vertical burrows to one 

 of three genera, ScolitJius, ArenicoUtes, and Histioderma, grouping 

 the moi'e or less horizontal under the name Planolites (with three 

 species), which is accepted by Sir J. W. Dawson,* who gives a figure 

 from a slab in the Calciferous Sandstone (Tremadoc) of St. Anne's, 

 which appears to be very similar. In the British Museum collection 

 are similar burrows (unnamed) from the same formation, sent by 

 Sir W. E. Logan from the Green Mountains, Vermont. They also 

 resemble the figure of Planolites (sp. ?) figured by Walcott^ from 

 the Olenellus zone. So I think the burrows on these two slabs 

 may safely be referred to Planolites, but shall not venture to suggest 

 a specific name. 



(3) Three slabs of a generally similar quartzite are irregular in 

 shape ; (a) being about 5" by 4" and 11" thick, (b) about 7" by 31", 

 (c) about 5" by 2^" (both rather thinner slabs), (a) has some 

 Planolites burrows on an irregularly undulating surface, with four 

 rudely parallel tapering marks, rather over 1" long, in general form 

 something like a Pteroceras spine." Similar objects, about seven in 

 number, but in some cases not so well defined, are found on (b) 

 (Plate XVII, Fig. 1) with one or two burrow-like marks, but here 

 some are longer, one or two reaching two inches. Both slabs show 

 obscure burrows on their under surface, (c) has one of the same 

 (obscure), and near it a small group resembling the markings referred 

 by Sir J. W. Dawson ' to ' rill-marks,' some obscure worm trails, 

 a bilobed object in relief about 1" by f" (Plate XVII, Fig. 2), and 

 possibly the impression of another.® It is a pointed oval in shape, 

 with a medial depression, like a grain of wheat, which broadens out 

 so as to produce a flattening at each end. I think the spine-like 

 marks may be the tracks of some rather large Crustacean, though 

 I find neither the corresponding set nor the usual central furrow ; 



1 Geol. New York, vol. i, p. 2, and pi. i. 



2 " Siluria," 4th ed., p. 40. They also recall those figured by Matthew (Proc. and 

 Trans. Eoy. Soc. Canada, vol. vii, p. 159, pi. ix) under the name of Chondrites 

 from the Cambrian (basal) of Acadia. 



3 Proc. Eoy. Soc, vol. sxi (1872-3), p. 288. 



1 Quart. Journ. Geol. Soc, vol. xlvi (1890), p. 612. 



5 Tenth Ann. Rep. U.S. Geol. Surv., pi. Ixi. 



^ The form sometimes slightly resembles, though very much larger than, the marks 

 attributed by Salter to Symenocaris vermicauda, Prestwich, Geology, vol. ii, p. 35. 



■^ Loc. cit., p. 545. 



8 It has a faint resemblance to the Russichnites of Dawson (loc. cit., p. 597), and 

 to one or two rather similar (but considerably larger) objects in the British Museum 

 collection. 



