268 BUSH 



1904, S. siMiLis * sp. nov. (See p. 242.) 

 p1. XXIX, fig. 3, c\ p1. XXXIX, figs. 16, 31 ; p1. xl, figs. 9, 17, 18; p1. 



XLIII, figs. 27, 31. 



• Alaska (Prince William Sound), on worm tubes {Crucigerd). 



1904. S. RUGATUS* sp. nov. (See p. 243.) 



p1. XXIX, fig. 3, b ; p1. XXXV, fig. 14 ; pi. XLiv, figs. 18, 19. 

 Alaska (Sitka), on rocks. 



1904. S. coMPTUS*sp. nov. (Seep. 244.) 

 California, on algse. 



1904. S. ASPERATUS* sp. nov. (Seep. 245.) 

 pi. XXVIII, fig. 10 ; p1. XXX, fig. 4 ; p1. xli, figs. 4, 5, 6, 8, 10, 11, 19, 31, 



32 ; p1. xliii, figs. I, 2, 3, 7, 13, 26. 

 California (Pacific Grove), Alaska (Sitka and Prince William Sound), on 



shells and worm tubes ( Crucigerd), 



1904. S. ABNORMis * sp. nov. (Seep. 245.) 



p1. xxxix, fig. 35 ; p1. XL, figs. I, 2 ; pi. XLlil, figs. 24, 28, 29. 

 Alaska (Sitka), on rocks. 



1904. S. INVERSUS* sp. nov. (Seep. 246.) 



Australia (Port Phillip, Victoria), on bryozoa {I^Tenipea cirrafaf). 

 1904. S. TRiDENTATUS * sp. nov. (See p. 246.) 



Australia (Port Phillip, Victoria), on bryozoa {Menipea cirrata f). 



1904. S. TUB^FORMis* sp. nov. (Seep. 251.) 

 p1. XXXIX, figs. 30, 32 ; p1. xlii, figs. 13, 14. 

 Long Island Sound, on Irish moss (^Chondrus). 



1904. S. EVOLUTUS* sp. nov. (Seep. 251.) 

 pi. XLII, figs. 20-22. 

 Grand Banks of Newfoundland, on shells {Siphd). 



1904. S. FORMOSUS* sp. nov. (See p. 252.) 



p1. XXXIX, figs. 18, 19; p1. xli, fig. 22 ; p1. xliii, figs. 18, 23, 25, 30. 

 Gulf Stream and Bermuda, on gulf-weed {Sargassuiti), etc. 



1904. S. MUTABiLis * sp. nov. (Scc p. 252.) 

 Bermuda, on shells. 



