344 BULLA. 



thin yellowish-brown epidermis. Surface smooth, showing under a 

 lens neither spiral striae nor granulation. Apical umbilicus very 

 small and deep, without spiral striae within when adult. Aperture 

 narrow and curved above, dilated below, lined with white callus ; 

 columella heavy and thick, with a crescentic white callus ; parietal 

 callus strong. 



Alt. 51, diam. 39 mill. 



Viti Is. (Garrett); Fiji Is. (U. S. Expl. Exped.) ; Lombok 

 (Tudor) ; Philippines (Ad.) ; Port Jackson (Challenger) ; Port 

 Stephens and Bellenger River (Brazier) ; Red Sea (Issel) ; Seychel- 

 les, Amirantes, Madagascar, Mauritius, Reunion, (Martens) ; Natal 

 Bay (Krauss). 



Bulla ampulla L., Syst. Nat. xii, p. 1183. SOWERBY, Genera, pi. 

 31, f. 4 AD., Thes. Conch, ii, p. 575, pi. 122, f. 59-62. SOWB., 

 Conch. Icon., f. 3. ISSEL, Mai. Mar Kosso, p. 167, 281. MARTENS, 

 Meeresfauna Mauritius, p. 303 ; Monatsber. Berl. Acad. 1879, p. 

 737._CooKE, Ann. Mag. N. H. (5), xvii, p. 130. WATSON, Chal- 

 lenger Gastr. p. 637. KRAUSS, Die Siidafrik. Moll. p. 70. ANGAS, 

 P. Z. S. 1877, p. 189. 7?. villosa MARTYN, Univ. Conch, ii, pi. 95 ; 

 Chenu's edit. p. 26, pi. 32, f. 3a. 



The largest species of the genus. It is distinguished from nebu- 

 losa by the greater solidity and the coloration, which never shows 

 dark shaded spots edged with white on the right side. It is more 

 globose than B. australis or B. adamsi. 



Var. bifasciata Menke. PL 34, fig. 5. 



Shell smaller, mottled all over as in the type, but encircled by two 

 dark bands; columella often with a low projection. 



Fiji Is.; Moluccas ; Philippines. 



Bulla collumellaris var. bifasciata MKE., Mai. Bl. i,p. 43, founded 

 upon Martini Conch. Cab. vol. i, f. 190, 191. B. bifasciata GOULD, 

 U. S. Expl. Exped. Moll., p. 220, f. 264, 1852, (as of Martini and 

 Chemnitz). 



Var. trifasciata Sowb. PI. 34, fig. 4. 



Shell mottled and encircled by three dark bands. Hardly dis- 

 tinct varietally from the preceding. 



Philippines (Cuming) ; Hall Sound, New Guinea; Solomon Is* 

 (Brazier). 



