﻿74 BULLETIN 103, UNITED STATES NATIONAL MUSEUM. 



larger than appears in this view, the earlier portion of the coil being 

 narrow. 



NONIONINA PANAMENSIS, new species. 



Plate 26, figs, la, b. 



Description. — Test in side view subcircular, last formed chamber 

 composed of about nine chambers, in front view bilaterally sym- 

 metrical, rapidly increasing in breadth as chambers are added, aper- 

 tiiral face of chamber broadly rounded, early portion slightly keeled; 

 sutures rather strongh' curved, slightly limbate, slightly depressed; 

 Avail smooth, distinctly punctate : aperture a narrow curved slit at the 

 base of the apertural face of the chamber. 



Diameter 0.65 mm. 



Specimens of this species were obtained from the lower part of 

 the Culebra formation, U.S.G.S. No. 6010. north of Pedro Miguel 

 Locks, in dark clay. 



Type-specimen.— Cat No. 324688, U.S.N.M. 



NONIONINA ANOMALINA, new species. 



Plate 26. figs. 2a, h. 



Description. — Test in side view nearly circular, deeply umbilicate» 

 peripheral margin broadly rounded, bilaterall}^ symmetrical, about 

 seven chambers in the last formed coil, sutures little if at all de- 

 pressed, indistinct, last formed chambers extending but part way 

 across the test, tending toward alternating arrangement; aperture 

 a narrow slit at the base of the chamber. 



Diameter 1.25 mm. 



Type-specimen. — (Cat. No. 324684, U.S.N.M.) from the lower part 

 of the Culebra formation, in dark clay, north of Pedro Miguel Locks 

 (U.S.G.S. No. 6010). 



The last tAvo chambers suggest Cassidulina, but the similarity does 

 not continue further. 



Genus POLYSTOMELLA Lamarck, 1822. 



POLYSTOMELLA STRIATO-PUNCTATA (Fitchel and Moll). 



Plate 26, figs. Sa, b; 4a, b. 



Nautilus striato-punctatus Fichtel and Moll, Test. Micr., 1803, p. 61, pi. 9, 



figs. a-c. 

 Polystomella striato-punctata Parker and .Tones, Ann. Mag. Nat. Hist., ser, 



3, vol. 5. 1860, p. 103, No. 6.— H. B. Brady, Rep. Voy. Challenger, 



Zoology, vol. 9, 1884, p. 733, pi. 109, figs. 22, 23. 



Description. — Test bilaterally symmetrical, subcircular in side view^ 

 umbilicate, peripheral margin broadly rounded, eight to ten chambers 



