I':', I AMlMIIHfl.IMA. 



b. Last whorl conspicuously shouldered ; width of shell two- 

 thirds its length or more ; more than three whorls. 



A. jja(n/<t, p. '234. 



li l . Shell ovate or oblong, spotted, not shouldered ; narrower; 

 less than 3 whorls. 



c. Very thin and fragile or flexible ; corneous or 

 greenish, with reddish dots, outer lip regularly arcu- 

 ate, not sinuate ; spire very short: 



St. Vincent, A. (if/rii/ir, p. 237; Dominica, A. 



pardalina, p. 237. 



c 1 . Thin but not fragile or flexible ; outer lip sinuated ; 



colored like the last ; spire slender, between and 



the length of shell ; Dominica, A. broicni, p. 238. 



c 2 . Thin, dark horn-colored with very few reddish dots; 



outer lip slightly sinuous ; Montrerrat. 



A. rawsonis, p. 239. 



li. Shell regularly .SMcc/Hea-shaped, pellucid, uniform rose corne- 

 ous, the spire projecting, apical H whorls wave-wrinkled, 

 whorls 2|. S.-g. Rhodonyx. A. rnbescens, p. 240. 



C. Shell much depressed, the spire very small, scarcely projecting 

 above the vert, x of the last whorl, apical whorl smooth ; whorls 

 less than two; columella with a more or less developed blade- 

 like process; aperture about as long as the whole shell. S. g. 

 Pellicula. 



a. Spire a trifle projecting above the posterior border of the 

 lip; columellar appendage well developed. 



A. appendifiildto, p. 241. 



'. Spire sunken or hardly projecting ; columellar appendage 

 less developed. A. i/e/-<:*((, p. 242. 



A. PATULA ( r.niL'iiiere). PI. CM, tigs. 14-19. 



Shell thiii but rather Milid, Suceim a-like, with the latter half or 

 third of the broad last whorl square-shouldered, flattened above; the 

 preceding portion not shouldered but -teeply sloping, slightly con\.-\. 

 Spirr -hort, conic, red or maroon, rarely yellow ; the last whorl yel- 

 lowish olivaceous, with finely xig/agged or dotted streaks of opaipic 

 \r||ow. Sui-lace \\ith low, irregular wrinkles of growth, and a close, 

 rather line >ciilpture of very irregularly anastomosing spiral cords, 

 oblicpiely docending on the lower portion, the first H whorls tinely 



