350 akerid.t:. 



of bis B. magdelus Lister, from Middle Harbor and Long Bay, N. 

 S. Wales. Tbe name " magdelus " seems to be an odd error for 

 amygdalus (Lister, pi. 714, f. 72), a West Indian form. 



^ t. * ;]' >!< ^ ^ jj; * 



The following species described by Schroeter are in my opinion 

 not identifiable with certainty unless the types can be found. All 

 but the latter three or four are undoubted typical Bullas. The 

 localities of none of them are known, 



B. MAPPA Schroeter, Archiv fiir Zool. u. Zoot. (Wiedemann) iv, 

 p. 17, 1804, may be B. ohlonga Ad. or solida Gmel. The coloring 

 is hardly that of ampulla. 



B. ADSPERSA Schroeter, t. c. p. 18, may be B. aspersa Ad., B. 

 mlida Gmel., or some otber white-sprinkled form. 



B. ciNEREA Schroeter, t. c. p. 18, may be amygdala Dillw. 



B. TIGRIS Schroeter, t. c. p. 19. Undetermined. 



B. RUFESCENS Schrocter, t. c. p. 19. Undetermined. 



B. DiscoRS Schroeter, t. c. p. 19. Undetermined. 



B. NEBULOSA Schroeter, t. e. p. 20, may be B. australis. 



B. MARMOREA Schrocter, /. c. p. 20, may be B. adamsi. 



B. PENNATA Schroeter, t. c. p. 21. Undetermined. 



B. PULvERULENTA Schroeter, t. c. p. 21. Undetermined. 



B. LiGATA Schroeter, t.c. p. 21. Undetermined. 



B. ANNUEATA Schroetcr, t. c. p. 23. Undetermined. 



B. PUNCTATA Schroeter, t. c. p. 24. Undetermined. 



B. PURPUREA Schroeter, t. c. p. 24, =Ach(itina jmrpurea Gmel. 



Bulla (Bullea) cypraeola Menke, Zeitschr. f, Mai., 1853, p.- 

 140, habitat unknown. 



Bulla (Bullea) nux Mke., t. c. p. 140, from Cuba, may prove 

 to be either B. occidentalis or B. amygdala. 



Bulla (Bullea) splendens Mke., t. c. p. 137, habitat un- 

 known. 



Family AKERID^E Pilsbry. 



=Bullidce in part, of Fischer, Man. de Conch., p. 558. 



Shell oval or cylindrical, thm and fragile, of a light yellow-, 

 brown or green tint, the spire low or concealed. 



