162 ACT.! 



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

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

 ture 2'75 mill. high. (March). 



St. Thomas (Ruse), one specimen. 



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

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

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

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

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



This differs from A. delicatus 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 delicatus the nucleus, instead of appearing larger, is con- 

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

 partially immersed. (Dall). 



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



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

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

 _'in 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; line* of growth 

 <juit<- |.r-( -|.tillc, suture somewhat appressed, not channelled ; aprr- 

 tim- 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 ini- 

 mrord in tin- -mvcrdiiiL: \\horl, apex not acute, surface usually not 

 polished, l>ut a little less coarsely sculptured than that of A. cuin- 

 Adams. Lon. of the largest spi-rimm, lO'O ; max. lat. 5'6; Ion. 

 of aperture, 6'0 mill. (/> 



