332 BULLA. 



faint grooves above, but this 18 exceptional. The umbilicus rarely 

 lacks internal lira*, but they are generally weak. 



Alt. 11, diam. 6 mill, (typical ow-idt-alnlis, Bahamas). 



Alt. 34, diam. 19 mill. (Vera Cruz specimen). 



Alt. 21, diam. 12J mill. (Jamaica specimen of ordinary size). 



Entire West Indies ; Mainland from Trinidad to Vera Cm:, <',-- 

 pus Christi, etc. f Florida; Jhihama*. 



II. nt-i-identafis A. ADAMS, in Sowb., Thes. ii, p. 577, pi. 12-S, f. 

 72, 73 (1850). SOWB., Conch. Icon., f. 14. BALL, Blake Rep., p. 

 ttKulla alba TURTON, Zool. Journ. ii, p. 364, pi. 13, f. 6 (worn 

 and bleached specimens, teste Dall, from Turton's types). ? B.per- 

 > M KI:., Zeitschr. f. Mai. 1853, p. 138.? Ii. mix MKE., t. c., p. 

 140. H. striata BRUG. (part of synonymy) and of many authors. 



This is the most abundant and universally diffused of the West 

 Indian Bullas. In examining hundreds of examples, covering the 

 entire region, we are unable to separate the small form originally 

 named occidentals, from the larger shells known to collectors as " />. 

 striata" Every connecting link occurs. Many of the main patterns 

 of coloring are illustrated on my plate, but there are others ; and s>me 

 have a delicacy quite beyond any published figures. 



Bulla (Hullea) tenuinda Mke., (Zeitschr. f. Mai. 1853, p. 139, and 

 Malak. Bl. i, p. 45, from Puerto Cabello), is probably a form of this 

 species. 



B. STRIATA Bruguiere. PL 37, figs. 42, 43, 44, 45, 46. 



Shell moderately solid, oblong-subcylindrical or oblong ovate. 



t:ip lini: toward the ends; whitish, mottled and clouded all over 



with purplish and usually showing an indi>tinct <:1rdle of heavier, 



darker blotches above the middle ; surface smooth, usually showing 



under a lens an excessively fine, close spiral striation, and having 



deeper spaced grooves toward the base and a few near the vertex. 



;ird the top the body-whorl is rather compressed, the vertex 



being a very narrowly rounded, romprcsxed margin around the ?//'/< 



ind deep apical umbilicus, which is closely spirally groove d 



within Tfig. 46). Aperture narrow above, wider below ; colunu-lhi 



with a / fiect, Innate, reflexed callus; parietal callus thin. 



Alt. 1M, diam. 1., mill. 



Mediterranean Ne .- At/antlr coasts of r<n\\i,jnl tmd Mnnn-m .- 

 "f Florida (Dall), <m<l Jirhif/ "t Clenrn'nt'-r Il'irbnr, If. 

 '" (Johnson). 



