116 BULLETIN 68, UNITED STATES NATIONAL MUSEUM. 



first and second, 18 upon the third to seventh, the eightli has a 

 strong varix, 20 upon the ninth, and 22 upon the tenth. On the 

 penultimate whorl they are decidedly enfeebled. Intercostal spaces 

 a Httle wider than the ribs, marked by ten equal and eqvially incised 

 spiral lines, the space between which is crossed by numerous ex- 

 ceedingly fine spiral striations. Periphery and base of the last whorl 

 well rounded, marked by fine lines of growth and numerous very 

 fine spiral striations. Aperture rhomboidal; posterior angle obtuse; 

 outer lip thin, showing the external sculpture within; also color 

 bands, of which a narrow white one occurs at the periphery which is 

 bounded on both sides by a brown band equaling it in width; an- 

 other narrow brown band bordered on each side by a narrow white 

 area occurs halfway between the periphery and the summit ; columella 

 slender, slightly curved and somewhat revolute. 



The type (Cat. no. 152751, U.S.N.M.) was dredged in 10 fathoms, 

 off San Pedro, California, by Mr. H. N. Lowe. It has lost the nucleus 

 and probably the first post-nuclear whorl; the twelve remaining 

 measure: Length 10 mm., diameter 2.3 mm. Another specimen 

 from the same station is in Mr. Lowe's collection, and another was 

 collected by Mrs. Oldroyd. 



TURBONILLA (MORMULA) MAJOR C. B. Adams. 

 Plate 11, fig. 11. 

 Chemnitzia major (!. B. Adams, Ann. Lye. Nat. Hist, of N. Y., voL 5, 1852, p. 391. 



Shell elongate-conic, milk-white with a few irregular faint rust 

 spots. (Nuclear whorls decollated.) Post-nuclear whorls well 

 rounded, appressed at the summit, moderately contracted at the 

 periphery, with moderately strongly developed varices at irregular 

 intervals and almost straight, well developed, vertical axial ribs, of 

 which 16 occur upon the first to fourth, 18 upon the fifth to ninth, 20 

 upon the tenth to twelfth, and 24 upon the penultimate turn. Inter- 

 costal spaces about double the width of the ribs, marked by seven 

 well-incised spiral lines, which, if the fourth were removed, would 

 be equally spaced. The spaces between the strongly incised lines 

 are marked by exceedingly fine spiral striations. Sutures slightly 

 impressed. Periphery and base of the last whorl well rounded, 

 posterior half of the latter marked by seven equal, well incised, 

 wavy spiral lines ; anterior half with exceedingly fine spiral striations 

 only. Aperture rhomboidal; posterior angle obtuse; outer lip thin, 

 showing the external sculpture within; columella strong and some- 

 what twisted. 



Professor Adams' type (Cat. no. 225 Amherst College) is the only 

 specimen of this species we have seen. It has lost the nucleus and 

 probably the first two post-nuclear turns. The fourteen remaining 

 measure: Length 9,7 mm., diameter 2.5 mm. It comes from Panama, 



