yd SMITIISOMAX MISCELLANEOUS COLLECTIONS VOL. I03 



The axis is about half as long as the pysidiwni and although it rises 

 above the pleural lobes, its convexity is not great. On the exfoliated 

 ]>ortion axial furruws and the pleural grooves are clearly indicated by 

 shallow furrows. 



Cap ^Mountain formation ; (loc. I4d) I'artlett 1 lollow, and (loc. 

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



//o/o/y/'r.— U.S.N. ]\I. No. ]o8767a; paratypes, Nos. 108767b, 

 108773a, b. 



COOSELLA BREVIS, new species 



Plate 14, Figures 6-9 



Only the illustrated incomplete cranidium and pygidium ha\-e been 

 found in this small collection. This species is fully characteristic of 

 Coosella in features of both the head and tail. The glabella, M'hich 

 tapers to a rounded front, lacks glabellar furrows. On the other hand 

 the occipital furrow and ring are clearly defined. At the anterior end 

 of the eye the fixigene is about half the glabellar width. The fixigene 

 maintains the same width with little change. Owing to the moderate 

 divergence of the anterior facial suture, there is a slight expansion in 

 front of the eye. The brim width equals nearly half the glabellar 

 length. It has a heavily striated swollen rim, defined by the anterior 

 furrow. The preglabellar area, which is wider than the rim, is de- 

 pressed below both the rim and glabella. 



The eye lobes, about half as long as the glabella, are not greatly 

 bowed and are set nearly parallel to the converging dorsal furrow. 



The almost semicircular pygidium is slightly wider than long. The 

 axis stands above the pleural platforms, and extends back for more 

 than two-thirds the pygidial length. It slopes sharply downward 

 near the posterior end to a slight postaxial ridge. Axial and pleural 

 furrows are shallow, but clearly defined in the exfoliated type. Since 

 the test is thick it is probable they are not to be seen on the outer 

 surface. The doublure has a width equal to about one-fourth the 

 pygidial length. 



Warrior limestone; (loc. 38e) i mile northwest of Benore, and 

 5 miles west of State College, Pennsylvania. 



Holotypc. — U.S.N.M. No. 108774a; paratype, No. 108774b. 



PTEROCEPHALINA Resser, 1938 

 PTEROCEPHALINA TEXANA, new species 



I'l.ATK 14, FuurKES 32, 33 



Only the li(il()tyi)e pygidium lias been found in this collection. The 

 wide axis with at least four rings tapers to a rather sharp point, back 



