344 WKST AMEKICAN MOLl.rsKS STEARNS. 



Family FASCIOl.A miD.K. 

 Subfamily i'rsiN.i:. 



(ifiiiis FUSUS l,:mi;iivU. 

 Fusiis^ polygonoides l.amarrk. 



A sinjjlo oxamplo, a.uidMiiu' more rlosely with this spocios than any 

 othor that is t'oiitaiiUMJ in the National c'olhH'ti(»u or tliat has hoiMi 

 (U'Si'ribod or tigiuvd, was oolloctetl at Cataliiia Island, California, by 

 :\lr. Fishoj- (Mus. No. ;i2;U8). 



Family XASSID.K. 



(u'liiis NASSA l.ainnr.k. 



Nassa bninneostoina 8tt anis. 



DoscTibod in '• Nnntihis." May. lS;i;>. \"ol. mi. iip. 10-11. 



Shell small, olonuatod ovati', ot'soxcn to <'ijiht whorls, with a i)oint(Ml 

 and ai'utt'ly elevated s])ire Mith uenerally three spiral scries of yran 

 ules; ot'easional individnals show four series on the iienultimate whorl 

 and six to seven on the basal. In sonu^ examph's tju' si-ulpture has the 

 appearanee ol" longitudinal ribs broken up into granules: in others the 

 sculpture sujiiiests spiral or revolvini'; ridues br«)ken into jiraiuiles; in 

 some examples the granulation covers nearly the whole of the basal 

 whorl: in others an area eipial to the last third of the basal whorl is 

 comparatively smooth. In s?>me indi\ iduals tlu' iiiaiuiles m'xt below 

 the suture are more eouspiemins than the others, and ajiain a double 

 row of more i)rominent liranules are seen on the upper part of the ba.sal 

 whorl. In .some iiulividuals the suturt' is distinct, in others ob.scui-e. 

 ]Most of the exami)les exhibit tiiu' revolvinji" lira' on the lower lialf ol" 

 the basal whorl. 



The aperture is small, ovatt\ about one-third the lenuth of the shell; 

 the outer lip is thiekly rimmed externally ami usually creiuilated and 

 denticulate within Just below the edue. Columella rouiully arcuated 

 with the usual callus abo\ c and a sinjiie terminal idieation at the base 

 of the i>illar, with lour or live obtuse ridges above. The greater part of 

 the basal whorl, as seen in front, is covered with shiny callus of a warm 

 chestnut brown, varying" more «)r less in de])th of color, in some cases 

 ipiite liuht. When held up to the lijiht, on lookinu' throuiih the aper- 

 ture, an obscure light ish band is perce})tible. The warm brown gla/e 

 surrounding the ai)erture ami covering the pillar is (piite characteris- 

 tic, and together with the acute and elevated si>ire, makes it easily 

 sei)arable fr«)m its nearest congeners. Its nearest ndatives geograph- 

 ically and «>therwise are .Y<f.s-.s7( coniplanata Powis( X. scahriiisriild i\ 

 li. Ad.) and A". te<iiil<t Keeve ( A. fianila KieiuM'), both comnu)u in 

 the Cxulf region and forming, with bninneostomti, a little group exhibit- 



