80 BULLETIN 103, UNITED STATES NATIONAL MUSEUM. 



ing an undulate appearance to the chambers, apertural end typically 

 with a slightly projecting neck, aperture with a single tooth; wall 

 smooth. 



Length 1.25 mm. Cat, Nos. 324716-17, U.S.N.M. 



Specimens referable to this species were obtained in the Emperador 

 limestone, at U.S.G.S. 6016, from old quarry, one-third mile north 

 of west of Empire; and in the Culebra formation, at 6025, in 

 foraminiferal marl about 200 yards south of the southern end of 

 the switch at Bohio Ridge Station, relocated line, Panama Railroad. 



The specimens are not so contorted as in some recent ones but show 

 characteristic undulations of the chamber borders. 



QUINQUELOCULINA BICORNIS (Walker and Jacob). 



Plate 30, figs. 2a-a; 3a, 6. 



" Serpula bicornis ventricosa," Walker and Boys, Test. Min., 1784, p. 1, 



pi. 1, fig. 2. 

 " Frumentaria foeniculum " Soldani, Testaceographia, vol. 1, pt. 3, 1795, 



p. 229, pi. 154, figs. 66, cc. 

 Serpula bicornis Walker and Jacob, Adams's Essays, Kanmacher's ed., 



1798, p. 633, pi. 14, fig. 2. 

 Miliolina bicornis Williamson, Rec. Forani. Great Britain, 1858, p. 87, pi. 



7, figs. 190-192.— H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 



1884, p. 171, pi. 6, figs. 9, 11, 12. 



Description. — Test in side view about twice as long as wide; 

 sutures rather deep, distinct, chambers more or less keeled, wail 

 ornamented with numerous rather fine longitudinal raised costae; 

 aperture slightly exserted, rounded, with a single tooth. 



Length 0.75 mm. Cat. Nos. 324718-9, U.S.N.M. 



Specimens were obtained in a Pleistocene deposit at U.S.G.S. 5850, 

 among loose shells and marl, from near Mount Hope, from ditch 

 through swampy ground about one- fourth mile from present sea 

 beach, and 6 to 8 feet above high tide. 



From the Culebra formation, U.S.G.S. 6025, in foraminiferous 

 marl about 200 yards south of southern end of switch at Bohio Ridge 

 Station, relocated line, Panama Railroad, were obtained, rather 

 poorly preserved and somewhat glauconitic specimens, but showing 

 traces of a longitudinal series of raised ridges. They are question- 

 ably referred here and one is figured, on plate 30, figure 3. 



QUINQUELOCULINA PANAMENSIS, new species. 



Plate 31, figs. la-c. 



Description. — Test nearly as wide as long, the last formed chamber 

 tending to become loose coiled, growing away from the preceding 

 ones on the apertural half of the inner margin, apertural end free. 



