NO. lO CAMHRIAN FOSSILS, 4TII CONTRIBUTION^ RESSER 5 



This species is characterized by its broad shape. The ventral valve 

 has a sharp apex but widens rapidly, so that the holotype is about 

 14 mm long and 12 mm wide. 



Upper Cambrian, Cap Mountain; (Iocs. 67, 67c) near the top 

 of Potatotop, 7 miles northwest of Burnet, Texas. 



Holotype. — U.S.N.M. no. 52420; paratype, no. 52419. 



tingulella alia, n. sp. 



Oholus matinalis Walcott (part), U. S. Geol. Surv. Alon. 51, p. 400, pi. 8, 

 fig. ik, 1912; Bridge (part), in Sellards, Adkins, and Plummer, Univ. 

 Texas Bull. 3232. pi. 2, fig. 15, 1932. 



This is a smaller brachiopod than the Cap Mountain species, 

 L. bnniefc]isis. Both valves are very wide, the holotype dorsal valve 

 being about 9 mm long and 9 mm wide. Even though the ventral 

 valve apjDears to be less wide, measurements show but little ditierence 

 between length and width. 



Upper Cambrian, Wilberns ; (loc. 71) Cold Creek Can}on, San 

 Saba County, and (loc. 14c) Baldwin's Ranch, Cold Creek, Llano 

 County, Texas. 



Holotype. — U.S.N.M. no.. 51566. 



Lingulella monticola, n. sp. 



Lingulella perattcnuata Walcott (part), U. S. Geol. Surv. Mon. 51, p. 523, 

 pi. 21, fig. le, 1912. 



This small, neat form was referred by Walcott to L. pcrattenuata. 

 The ventral valve is about 6 mm long and 3.5 mm wide, and the 

 rate of taper is nearly rapid enough to warrant reference to Lingitlepis. 

 Otherwise the species conforms to the norm for the genus. This 

 form is more slender than the older species, L. longula. 



Upper Cambrian, Cap Mountain (Lion Mountain member .'') ; (loc. 

 67c) Potatotop, 7 miles northwest of Burnet, Texas. 



Holotype. — U.S.N.M. no. 27424. 



Lingulella longula, n. sp. 



Lingulella pcrattenuata Walcott (part), U. S. Geol. Surv. Mon. 51, p. 523, 

 pi. 21, figs, if, g, 1912. 



L. pcrattenuata is thus far conlined to the Black Hills and the 

 name must be restricted to Whitfield's specimens. Unfortunately 

 they do not warrant the precise drawings Walcott presents. The 

 form from the Middle Cambrian of the Grand Canyon is an unde- 

 scribed species. The specimens in sandstone from locality 70 also 

 represent a new species, but since most of the material Irom that 



