Art. 11 NEW AMEKICAN MARINE MOLLUSKS — BARTSCH 5 



tively slanting riblets. The entire surface of the spire is marked, 

 also, by exceedingly fine closely spaced incised spiral lines. Periphery 

 of the last whorl well rounded. Base short, well rounded, marked 

 by rather strong incremental lines and the same fine spiral sculpture 

 that marks the spire. Aperture oval; posterior angle acute; outer 

 lips thin; inner lip somewhat sinuous, slanting protractively, re- 

 flected over and appressed to the base for two-thirds of its length; 

 parietal wall covered by a thin callus. 



The type, Cat. No. 217930, U.S.N.M., was collected in Magdalena 

 Bay, Lower California, by C. R. Orcutt. It has lli/^ whorls remain- 

 ing and measures, altitude, 7.4 mm.; diameter, 1.8 mm. 



Cat. No. 863779, U.S.N.M.. contains nine topotypes. 



TURBONILLA (STRIOTURBONILLA) KINCAIDI Bartsch 



Plate 1, fig. 3 



Tttrbonilla (Strioturbonilla) kincaidi Bartsch, Proc. Biol. Soc. Wash- 

 ington, vol. 34, 1921, pp. 33-34. 



Shell rather broadly elongate conic, yellowish white. Nuclear 

 whorls decollated. The remaining turns are moderately well 

 rounded and somewhat overhanging, appressed at the summit, de- 

 cidedly constricted at the suture, marked by rather depressed, 

 slightly retractively slanting axial ribs, of which 18 occur upon the 

 first of the remaining turns, and 20 upon all the other turns. The 

 spaces which separate the ribs are moderately impressed and termi- 

 nate roundly about one-eighth of the distance between the summit 

 and the suture, anterior to the suture. Periphery of the last whorl 

 well rounded. Base short, inflated, well rounded, marked by the feeble 

 continuation of the axial ribs, which become evanescent before 

 reaching the umbilicus. In addition to the above sculpture the entire 

 surface of the spire and base is marked by very fine closely spaced 

 spiral striations. Aperture rather large, very broadly oval, almost 

 subquadrate ; posterior angle obtuse ; outer lip thin, showing the ex- 

 ternal sculpture within; inner lip slender, somewhat sinuous, re- 

 flected over and appressed to the base for three-fourths of its length ; 

 parietal wall covered by a moderately thick callus. 



The type. Cat. No. 340844, U.S.N.M., comes from Dogfish Bay, 

 Puget Sound. It has eight whorls remaining and measures, length, 

 5.5 mm. ; diameter, 1.7 mm. 



TURBONILLA (CHEMNITZIA) ENGBERGI Bartsch 



Plate 1, fig. 4 



Turhonilla (Chemnitzia) eng'bergi Bartsch, Journ. Wash. Acad. Sci., vol. 

 10, 1920 No. 20, p. 570. 



Shell small, elongate-conic, thin, semitransparent, bluish white. 

 Nuclear whorls decollated. Postnuclear whorls moderately rounded, 



