274 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 53 



The preceding description is based on adult flattened specimens of 

 E. asaphoidcs Emmons, as shown by fig. i, pi. 24. In uncompressed 

 cephalons and dorsal shield from a limestone matrix [figs. 3-7, pi. 

 24], the convexity is greater and the relief of the surface stronger. 



Formation and Locality.— Lo^ve^ Cambrian : Greenwich forma- 

 tion [Dale. 1904, pp. 29, 43. and 50. and pi. I] in thin-bedded lime- 

 stones interbedded in siliceous shales at the following localities : 

 (35b)' adjoining the house of D. W. Reed on the roadside near the 

 Old Reynolds Inn. i mile (1.6 km.) west of North Greenwich; 

 (35) western side of D. W. Reed's farm, 1.5 miles (2.4 km.) north 

 of Bald Mountain: (36a) on the roadside about 3 miles (4.8 km.) 

 northeast of North Greenwich; (33) on the roadside near Rock 

 Hill Schoolhouse No. 8 in Greenwich Township; (33b) 1.5 miles 

 (2.4km.) east-southeast of North Greenwich; (34) a little west 

 of the bridge over the Poultney River at Low Hampton; (45b) on 

 the roadside 70 rods east of Bristol's house at Low Hampton; (36) 

 I mile (1.6 km.) south of Shushan in the town of Jackson, 3.5 miles 

 (5.6 km.) north of Cambridge; (38) .25 mile (.4 km.) north of 

 John Hulett's farmhouse. 3 miles (4.8 km.) west of South Gran- 

 ville; (38a) 2 miles south of Nortli Granville on the road which 

 turns south from the road running between that village and Truth- 

 ville ; and (37) 1.5 miles (2.4 km.) south of Salem; all in Washing- 

 ton County, New York. 



(29a) limestone i mile (1.6 km.) below the New York Central 

 Railroad depot at Schodack Landing; and (27) even-bedded and 

 conglomerate limestones on the ridge in the eastern suburb of Troy ; 

 both in Rensselaer County, New York. 



(32) sandstone on the south slope of Stissing Mountain. Dutchess 

 County, New York. 



Genus CALLAVIA Matthew 



Olenellus W.-\lcott (in part) [not H.'^Li-l, 1866, Bull. U. S. Geol. Survey, 

 No. 30, pp. 162-166. (Described and discussed. As discussed the genus 

 includes forms now referred not only to OJenellus. but to Callavia, 

 EUil'tocc^hala. and PcacheUa.) 



Olenellus Walcott (in part) [not Hall], 1891, Tenth Ann. Rcpt. U. S. 

 Geol. Survey, pp. 633-635. (As discussed the genus includes forms 

 now referred to both Olenellus and Callavia.) 



Ccphalocanthus Lapworth (in part) [not Lacepede], 1891, Tenth Ann. 

 Rept. U. S. Geol. Survey, by Chas. D. Walcott, p. 641. (Proposed as a 

 new genus to include Olenellus kjcrulfi, O. broggeri. and O. callavci. 

 The name was. however, preoccupied by Lacepede, 180J. Hist. Nat. 

 Poiss., Vol. 3, p. :?,22,. ) 



^ This is the Reynolds Inn locality of Emmons and Fitch. 



