34^ SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 53 



and doubtfully placed under Olenellus. His illustrations indicate a 

 large trilobite that, when better specimens are found, may be a 

 species related to, but distinct from, 71/. torelli, or it may be identical 

 with that species. 



Formation and Locality. — Phosphatic nodules in green sand- 

 stone on the shore, half way between Brantevik and Gislof shammer, 

 Sweden [Moberg, 1899, p. 338] . 



OLENELLUS ?, sp. undt. 



Plate 39, Fig. 14 



Of this form only one small cephalon, 1.25 mm. in length, has been 

 found in the collections from the Olenellus lapzvorthi zone of north- 

 west Scotland. The elongate slightly tapering glabella and long 

 eye lobes are like those of the young and small cephalons of Olenellus, 

 so that for the present the reference is made to that genus. The 

 cephalon is associated with Olenellus lapzvorthi, O. reticulatus, O. 

 gigas, and OleneUoides armatus. 



Formation and Locality.— Lower Cambrian : argillaceous shale 

 interbedded in " Serpulite grit," a coarse quartzitic sandstone, north- 

 ern slope of Meal a' Ghubhais, 1,200-1,300 feet (366-396 m.) above 

 Loch Maree, 4 miles (6.4 km.) northwest of Kenlochewe, in the 

 west of Ross-shire, Scotland. 



PEACHELLA, new genus' 



Of this genus only the cephalon of one species is known. This 

 is described under the species P. iddingsi. 



Genotype. — Olenellus idduigsl ^\^^lcott [1884, p. 28]. 



The generic name is given in honor of Dr. B. N. Peach, of the 

 Geological Survey of Scotland. 



Stratigraphic range. — In arenaceous shales and thin, interbedded 

 layers of limestone of the Pioche formation, upper part of the Lower 

 Cambrian (Georgian). 



Geographic distribution. — Eastern third of Nevada for about 150 

 miles between the most northern and southern localities. 



Observations. — The cephalon of Peachella [pi. 40, figs. 17, 18] is 

 distinguished by its blunt, tumid genal spines ; elongate, narrow 

 glabella ; small eyes and marJced convexity. The small eye is not 



^ The type and only species of this genus has been placed under Olenellus in 

 the following references: Walcott [1884, p. 28; 1886, p. 170; and 1891, p. 636] 

 and Holm [1887, p. 515]. 



