162 ACTION. 



Spire elevated, with two punctate lines. Columellar fold oblique, 

 but little projecting; lip thick. Alt. 4*75, diam. 2'25 mill. ; aper- 

 ture 2-75 mill. high. (MorcK). 



St. Thomas (Ruse), one specimen. 



A. splendidula MORCH Malak. Blatter xxii, p. 170, 1875. 

 A. CUMINGII A. Adams. PI. 19, figs. 16, 17. 



Shell oval, subcylindrical, flesh colored ; spire exserted ; whorls 

 convex, transversely sulcate, the sulci beautifully cancellated, lon- 

 gitudinally striated. Columella with a single fold below. Aperture 

 white inside, the lip acute, subsinuous above. (Ad.*). 



Rio Janeiro (Martin) ; Porto Rico (Krebs) ; 5 miles off Cape 

 Florida, in 8 fins. (Rush). 



A. cumingii A. AD., P. Z. S. 1854, p. 59. MORCH, Mai. Bl. xxii, 

 p. 169. DALL, Blake Rep. Moll., p. 40. Tornatella cumingii RVE., 

 Conch. Icon, xv, f. 12. Tornatella textilis GUPPY, Geol. Mag. 

 1874, p. 407, pi. 16, f. 4. 



This differs from A. delieatus by its stumpier form, coarser and 

 ruder subcancellate striation, more prominent fold on the columella, 

 and particularly by its nucleus which, though small, is swollen and 

 set on the peek of a very' acute spire like a swollen terminal bud on 

 a twig. In delieatus the nucleus, instead of appearing larger, is con- 

 siderably smaller than the whorl in front of it, in which it is also 

 partially immersed. (DalT). 



A. DELICATUS Dall. PL 20, fig. 35. 



Shell ovate, white, or suffused with rose pink, not in bands but 

 generally, or in longitudinal flammules, with usually a white mar- 

 gin in front of the suture ; there are six or seven whorls, the last 

 more than half the length of the shell, regularly rounded and 

 grooved by, on the last whorl, 20-30 strong, rather deep, coarsely 

 punctate grooves between rounded interspaces; lines of growth 

 quite preceptible, suture somewhat appressed, npt channelled ; aper- 

 ture more than half as long as the shell ; outer lip thin, inner lip 

 hardly callous, columella straight, without any chink behind it, 

 and bearing a single moderate fold. Nucleus small, mostly im- 

 mersed in the succeeding whorl, apex not acute, surface usually not 

 polished, but a little less coarsely sculptured than that of A. cum- 

 ingii Adams. Lon. of the largest specimen, lO'O ; max. lat. 5*6 ; Ion. 

 of aperture, 6'0 mill. (Dall). 



