102 University of Texas Bulletin 



p.nd- sharp keeled, .giving to the shaft a Cereus-like appearance. At the base of the 

 spine there is an inflated sharp topped milled collar; the condyle is constricted and the 

 articulating surface deeply excavated. Locality: 601, near Gainesville, Texas; widely 

 distributed in North Texas. 



Cidarid sp. 2, spine: Cidarid spines of medium length, the shaft not inflated. The 

 shaft bears about 30 depressed, even topped, equal and equally spaced continuous lines. 

 The base is gently inflated and straight sided down to the collar. The collar is not 

 milled and is rounded, making a wide angle with the shaft. The straight margin of 

 the base below the collar descends to the rim of the circular articulating socket. This 

 spine differs from the preceding in having numerous nonserrate carinae. Locality: 

 601, pit of brickyards, near Gainesville, Texas. 



Cidarid sp. 3, spine: Spines with an inflated, club-like shaft bearing about 10 

 sharply but unequally elevated, smooth keeled carinae and a prominently constricted 

 neck. The margins of the base above and below the collar are smooth and straight 

 and make at the collar a rounded angle of about 135 degrees. The rim of the cir- 

 cular articulating socket is a ring-like thickening. Cross section of inflated shaft ang- 

 uJar and subcircular. Locality: 601, pit of brickyards near Gainesville, Texas, Quarrj 

 limestone. 



GONIOPYGUS .p. 



A species of Gonipygus from the basal five feet of the Pawpaw forma- 

 tion clay facies, locality 714, near Fort Worth, Texas, is in the hands of 

 Professor F. L. Whitney for description. 



PEDINOPSIS SYMMETRICA (Cragin) 



1893: Dumblea symmetrica Cragin, Geol. Surv. Texas, 4th Ann., Kept., p. 150, pi. xxiv, 1 



fig. 12; pi. xxv, figs. 4-7; pi. xxvii, fig. 1. 

 1915: Pedinopsis symmetrica Clark, U. S. G. S., Mon. LIV, p. 64, pi. xxiii, figs. 1 a-h 



Three individuals of this species found in the basal Weno marl, locality 

 618, near Fort Worth, Texas, have been placed in the hands of Professor 

 F. L. Whitney for description. 



PELTASTES sp. 



A poorly preserved individual somewhat similar to a Peltastes found 

 in the topmost stratum of the Mainstreet limestone at Denison, Texas, 

 was found at locality 714, near Fort Worth, Texas, in the basal stratum 

 of the Pawpaw clay, and it is referred to this genus. These echinoids 

 will be described by Professor F. L. Whitney. 



Erroneously cited as pi. xxxiv by Cragin and Clark. 



