268 BUSH 



1904. S. SIMILIS * sp. nov. (See p. 242.) 

 pi. xxix, fig. 3, c; pi. xxxix, figs. 16, 31 ; pi. XL, figs. 9, 17, 18 ; pi. 



XLIII, figs. 27, 31. 



Alaska (Prince William Sound), on worm tubes (Crucigercf). 

 1904. S. RUGATUS*sp. nov. (Seep. 243.) 



pi. xxix, fig. 3, b ; Pi. xxxv, fig. 14 ; pi. XLIV, figs. 18, 19. 

 Alaska (Sitka), on rocks. 

 1904. S. COMPTUS* sp. nov. (See p. 244.) 



California, on algae. 



1904. S. ASPERATUS* sp. nov. (See p. 245.) 

 rl. xxvni, fig. 10 ; pi. xxx, fig. 4 ; pi. XLI, figs. 4, 5, 6, 8, 10, n, 19, 31, 



32 ; pi. XLIII, figs, i, 2, 3, 7, 13, 26. 



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

 shells and worm tubes ( Crucigercf). 



1904. S. ABNORMIS * Sp. nOV. (See p. 245.) 



Pi. xxxix, fig. 35 ; pi. XL, figs. I, 2 ; pi. XLIII, figs. 24, 28, 29. 



Alaska (Sitka), on rocks. 

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



Australia (Port Phillip, Victoria), on bryozoa (Menipea cirrata?}. 

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



Australia (Port Phillip, Victoria), on bryozoa (Menipea ctrrata .?). 

 1904. S. TUB^EFORMIS* sp. nov. (See p. 251.) 



pi. xxxix, figs. 30, 32 ; pi. XLII, figs. 13, 14. 



Long Island Sound, on Irish moss (Chondrus). 

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



Pl. XLII, figs. 20-22. 



Grand Banks of Newfoundland, on shells (Siphd). 

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



pi. xxxix, figs. 18, 19; pi. XLI, fig. 22 ; pi. XLIII, figs. 18, 23, 25, 30. 



Gulf Stream and Bermuda, on gulf-weed (Sargassutri), etc. 

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



Bermuda, on shells. 



