368 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 57 



Fragments of the pygidiuni indicate a width of 20 cm. at the anterior 

 margin, which is about twice the size of the pygidium of D. vanhornei 

 represented by figure 3, plate 62. 



The surface is marked by fine, raised, more or less irregular lines 

 or sharp ridges that are subparallel to the outer margin of the border 

 of the cephalon and pygidium and to the margins of the thoracic 

 segments. These lines also probably occur on the glabella. Punctae 

 similar to those of the test of Dikelocephalus are indicated. 



This species appears to indicate a genus intermediate in character 

 between Dikelocephalus and Anojiwcare. In the absence of good 

 specimens it is referred tentatively to Dikelocephalus. The only 

 associated species is Illccnurus elongatus n. sp. 



The specific name is given in recognition of the discovery of the 

 species by Dr. Reginald A. Daly. 



Formation and locality. — Upper Cambrian: (3466) limestone 

 nodules in calcareous shales in rock cut on Canadian Pacific Railway, 

 54.5 miles (87.2 km.) west of Field, and 2 miles (3.2 km.) west of 

 Donald Station, British Columbia, Canada (R. A. Daly, 1912). 



DIKELOCEPHALUS HARTTI (Walcott) 



Plate 63, figs. 1-7, ja 



Conoccphalites hartti Walcott, 1879, Thirty-second Ann. Rept. New York 



State Mus., p. 130. (Original description of species.) 

 Dicelloccphalus hartti (Walcott), 1886, Bull. U. S. Geol. Survey, No. 30, 



p. 21. (Name used in lists of species.) 

 Dicellocephalus hartti (Walcott), Lesley, 1889, Geol. Surv. Pennsylvania, 



Rept. P4, Dictionary of Fossils, Vol. i, p. 199. (Text figures reproduced 



from drawings sent him by Walcott.) 

 Dicellocephalus hartti (Walcott), 1912, Smithsonian Misc. Coll., Vol. 57, 



No. 9, p. 2y2i, pl- 44, figs. 1-7, Ja. (Describes, illustrates, and comments on 



species.) 



A description with comments on this species has been recently pub- 

 lished (Walcott, 1912). The only additional information is to note 

 the occurrence of several pygidia that appear to be identical with 

 those illustrated on plate 63, figures 6, 7 of this species, in the upper 

 layer of the Potsdam formation on Marble River, north of the Adi- 

 rondack Mountains in New York. 



Formation and locality. — Upper Cambrian : Hoyt formation ; (76) 

 arenaceous limestone at Hoyts quarry, 4 miles (6.4 km.) west of 

 Saratoga Springs, and (76a) in a railroad quarry, i mile (1.6 km.) 

 north of Saratoga Springs, both in Saratoga County (C. D. Walcott 



