194 SMITHSONJAN MISCELLANEOUS COLLECTIONS \0L. 64 



Formation and locality. — Upper Cambrian : Potsdam sandstone 

 formation; (77) near the water level below the falls at the high 

 bridge and also at several horizons in the section above, the highest 

 point being 70-75 feet (21.3 to 22.9 m.) above the water, Ausable 

 Chasm, near Keeseville, Essex County: (136a) in sandstone on a 

 large brook at a point on the Mineville Railroad at the turning of 

 the first Y near Port Henry, Essex County; (109) in sandstone 25 

 feet (7.6 m.) above the Archean, 1.5 miles (2.4 km.) south of 

 Deweys Bridge on the Champlain Canal, Washington County; 

 (iioa) in sandstone a little above and east of the canal road, north 

 end of town of Whitehall, Washington County; and (m) at the 

 top of the Potsdam sandstone on Marble River, i mile (1.6 km.) 

 south of Chateaugay, Franklin County; all in New York. 



LONCHOCEPHALUS PHOLUS, new species 

 Plate 34, figs. I, la-b 



This species is known only from the cranidium. It differs from 

 L. chippewaensis Owen and L. minutus (Bradley) in details of the 

 glabella, fixed cheeks, and frontal limb. The cranidium is less con- 

 vex and the occipital spine stronger than in the species mentioned. 



The surface appears to be finely granulated as in L. plena, and 

 also to have shallow pits scattered over it. The associated L. plena 

 (pi. 33, fig. 2) has a shorter frontal limb and a convex and evenly 

 rounded glabella. 



The largest cranidium has a length of 6 mm. exclusive of the 

 occipital spine. 



Formation and locality. — Upper Cambrian: (son) Weeks forma- 

 tion (ic of section),^ also (30 o) (ib of section) ; north side of 

 Weeks Canyon, 4 miles (6.4 km.) south of Marjum Pass, House 

 Range, Millard County, Utah. 



LONCHOCEPHALUS PLENA, new species 



Plate 34, figs. 2, 2a 



This species is represented by a cephalon and several cranidia. 

 It differs from the associated L. pholus in the outline of the glabella, 

 short frontal limb, and very narrow fixed cheek. 



Surface of test apparently finely granulated and with shallow pits 

 scattered irregularly on it. 



The largest cranidium has a length of 3.5 mm. exclusive of the 

 occipital spine. 



^ Smithsonian Misc. Coll., Vol. 53, 1908, p. 178. 



