54 BULLETIN" 103, UNITED STATES NATIONAL MUSEUM. 



Genus CHRYSALIDINA d'Orbigny, 1846. 



CHRYSALIDINA PULCHELLA, new species. 



Plate 20, fig. 2. 



Description. — Test elongate, gently tapering, broadest at the apical 

 end ; in end view triangular ; early chambers triserial, later ones uni- 

 serial ; chambers in uniserial portion triangular, the sutures distinct, 

 gently curved backward at the angles, outline more or less irregular, 

 apertural face gently convex, with indications of numerous circular 

 apertural openings, wall smooth. 



Length 0.5 mm., breadth 0.2 mm. 



This species occurred at U.S.G.S. No. 6036, the Gatun formation, 

 in dark-colored, fine-grained, sandjr clay marl, from Monkey Hill, 

 Mount Hope Station. 



The species differs from the only known recent species, Ghrysa- 

 lidina dimorpha, in the more tapering and elongate test, the greater 

 irregularity of the contour and test in general and its generally less 

 trim and neat appearance. The specimen figured is well preserved 

 in its general characters, except those of the apertural face, which 

 are somewhat obscured. 



Type-specimen. — Cat. No. 324615, U.S.N.M. 



Genus BOLIVINA d'Orbigny, 1826. 



BOLIVINA ef. B. PUNCTATA d'Orbigny. 

 Plate 21, fig. 3. 

 Bolivina punctata d'Okbigny, Voyage Amer. Merid., vol. 5, pt. 5, " Forarui- 

 niferes," 1839, p. 63, pi. 8, figs. 10-12.— H. B. Brady, Rep. Voy. Chal- 

 lenger, Zoology, vol. 9, 1884, p. 417,- pi. 52, figs. 18, 19.— Flint, Ann. 

 Rep. U. S. Nat. Mus., 1897 (1899), p. 292, pi. 38, fig. 1. 



Description. — Test much elongate, sides nearly parallel, abruptly 

 tapering at the initial end, chambers numerous, usually higher than 

 broad, inflated, sutures distinct but slightly depressed; wall finely 

 punctate, occasionally becoming slightly striate. 



Length 0.60 mm., breadth 0.15 mm. Cat. No. 324616a, b, U.S.N.M. 



Specimens which seem referable to this species were obtained at 

 U.S.G.S. No. 6033c, Gatun formation, marl from second bed from 

 bottom, just below lower clay, Gatun section, relocated line Panama 

 Railroad and 6035, Gatun formation, from gray green, fine grained, 

 sandy shell marl, vicinity of Mindi Hill. There is a tendency for 

 the specimens to take on a semi-striate appearance, an extreme form 

 both in shape and striation shown in plate 21, figure 3. 



BOLIVINA AENARIENSIS (Costa). 



Plate 21, fig. 2. 

 Brisalina aenariensis Costa, Atti Acad. Pontaniana, vol. 7, 1856, p. 297, pi. 



15, fig. 1, A. B. 

 Bolivina aenariensis H. B. Brady, Proc. Roy. Soc. Edinburgh, vol. 11, 1882, 



p. 711; Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 423, pi. 53, figs. 



10, 11. 



