56 BULLETIN G8, UNITED STATES NATIONAL MUSEUM. 



The specimen referred to above, tablet 2002, is a l)adly worn young 

 shell, with indications of very protractive axial ribs and finely spirally 

 striated base. 



Carpenter's manuscript figure is evidently taken from the young 

 individual referred to above, which shows a peripheral series of pits 

 and numerous fine spiral striations. 



TURBONILLA (STRIOTXJRBONILLA) AFFINIS C. B. Adams. 



Plate 4, fig. 14. 

 Chemnitzia affinis C. B. Adams, Ann. I.yc. Nat. Hist., of N. Y., vol. 5, 1852, p. 389. 



Shell slender, wax yellow, with a narrow brighter colored band 

 about one-third of the distance between the sutures, anterior to the 

 summit. (Nuclear whorls decollated.) Post-nuclear whorls slightly 

 roimded and moderateh' shouldered at the summit, marked by well- 

 rounded, low, slightly protractive axial ribs, of which 18 occur upon 

 the first and second, 20 upon the third and fourth, 22 upon the fifth, 

 24 upon the sixth and the remaining turns. Intercostal spaces a 

 little narrower than the ribs, shallow, marked by a moderately strong 

 series of peripheral pits and probably 60 to 80 fine, equal, and equally 

 spaced, strongh^ incised spiral lines. Periphery and base well rounded, 

 marked by numerous, closely spaced, well incised, wavy spiral stria- 

 tions. Aperture rhomboid, outer lip thin, showing the external 

 sculpture within; columella moderately strong, almost straight and 

 somewhat revolute. 



Professor Adams's type, which has served for our description and 

 figure, consists of the last eight whorls and measures: Length 5.3 

 mm., diameter 1.3 mm. It is in the Amherst College collection and 

 comes from Panama. 



TURBONILLA (STRIOTURBONILLA) PHANEA, new species. 



Plate 4, figs. 4, 4a. 



Shell very small and slender, milk-white. Nuclear whorls two, 

 depressed, helicoid, having their axis at right angles to that of the 

 succeeding turns, in the first of which they are about one-fourth 

 immersed. Post-nuclear whorls well rounded, with their greatest con- 

 vexity on the anterior third between the sutures. Summits appressed, 

 marked by strong, narrow, slightly protractive axial ribs, of which 

 fourteen occiu- upon all of the w^horls. Intercostal spaces about three 

 times as wide as the ribs, marked between the sutures b}^ a peripheral 

 series of pits and sixteen equal and equally spaced incised fine lines. 

 Sutures well impressed. Periphery of the last whorl well rounded, 

 appearing as a plain band. Base short, well rounded, marked by the 

 faint continuations of the axial ribs and about fifteen very fine, wavy 

 incised, spiral lines, of whicli the first below the periphery is a little 

 stronger than the rest. Aperture rhomboid, rather long; posterior 



