28o SMITHSONIAX MISCELLANEOUS COLLECTIONS VOL. 53 



The new material of this species that has been added to our 

 collection since the specific description was published in 1891 [Wal- 

 cott, pp. 638-641] shows that the intergcnal spines of a small ceph- 

 alon 5 mm. in length are long and slender, and extend a little beyond 

 the points of the genal spines. The glabellar furrows are very faint 

 and the occipital spine slender. The generic relations of the species 

 have been discussed under the genus CaUavia [p. 276]. 



Formation and Locality. — Lower Cambrian: (41) sandstone' 

 in a railroad cut i mile (1.6 km.) west of the Manuels Brook rail- 

 way bridge; (?) a decomposed arenaceous limestone 1,200 feet 

 (366 m.) west of the railway bridge mentioned in 41; in railway 

 cuts 300 feet (91 m.) west (sp), i mile (1.6 km.) west (5s), and 

 1.5 miles (2.4 km.) west (sr) of Manuel Station; (41a) a compact, 

 thin-bedded limestone beneath Topsail Hearl ; (42) a horizon nearly 

 corresponding to the base of the Manuels Brook section, on Brigus 

 Head; and at (st and 5u) slightly different horizons' on Redrock 

 Point, near Chappie Cove. Hollywood Point ; all on Conception 

 Bay, Newfoundland. 



(511) shale on Smith Point in Smith Sound, Trinity Bay, New- 

 foundland. 



CALLAVIA BURRI, new species 

 Plate 28. Figs. 9-10 



Olenellus sp. Bitrr, 1900, American Geologist, Vol. 25, p. 45. (Notes 

 occurrence of an unidentified species of Olenellus.) 



Olenellus sp. Grabau, 1900, Occasional Papers, Boston Soc. Nat. Hist, No. 

 4, Vol. I, pt. 3, pp. 665-667, pi. 34, figs. la-b. (Described as possibly 

 belonging to a new subgenus of Olenellus. The specimen represented 

 by figure la is redrawn in this paper, pi. 28, fig. 9.) 



Cephalon semicircular in outline, moderately convex in its fine, 

 quartzitic sandstone matrix ; bordered by a moderately broad, slightly 

 convex rim that is separated from the cheeks by a faintly defined 

 furrow ; genal angles, as now known, extended in small, short, flat- 

 tened spines ; posterior border narrow and rounded next to the 

 occipital ring and gradually widening to where it curves into the 

 outer border at the genal angle ; it has a slight undulation midway 

 of its length, but is not interrupted by the crossing of the ridges of 

 intergenal spines ; intermarginal fiuTow narrow and slightly de- 



* See the section given by Walcott TiSgib, pp. 260-261] for the stratigraphic 

 position of the species in the section on Manuels Brook. 



' Locality No. 5u is about 175 feet higher than 5t, which is 20 feet above the 

 base of the section. 



