@book {174,
	title = {The Sipuncula. Their systematics, biology and evolution},
	year = {1994},
	pages = {453 pp},
	publisher = {Cornell University Press},
	organization = {Cornell University Press},
	address = {Ithaca, N.Y.},
	author = {Cutler, E. B.}
}
@article {185,
	title = {A revision of the genera Sipunculus and Xenosiphon (Sipuncula)},
	journal = {Zoological Journal of the Linnean Society},
	volume = {85},
	year = {1985},
	pages = {219-246},
	author = {Cutler, E. B. and Cutler, N. J.}
}
@article {545,
	title = {El problema del taxon Sipunculus gravieri (Herubel, 1904a) y la descripcion de una nueva especie para el genero Xenosiphon (Sipuncula, Sipunculidae)},
	journal = {Miscellania Zoologica, Barcelona},
	volume = {8},
	year = {1984},
	note = {He split the type specimens of Herubel{\textquoteright}s into two parts. One part he called a new species - X. absconditus. Differs from X.b. \& X.c by number of LMB{\textquoteright}S. However, according to our revision this would fall in the X.b. range now. DESC. PP 64-66 - WORMS FROM RED SEA 1 WHOLE SPECIM \& PARTS, WHOLE IS 112 MM LONG. *THERE WAS GARBAGE IN HERE FROM STEUER, 1939 / CUT 9/97},
	pages = {63-66},
	author = {Saiz Salinas, J. I.}
}
