@article {687,
	title = {Functional development in four species of the Sipuncula},
	journal = {University of Hawaii, dissertation},
	year = {1977},
	note = {ABSTRACT: UNIQUE LARV; PELAGOSPHERA; EITHER LECITHO OR PLANKTO TROPHIC. 3 PLANKTO LARV \& 1 LECITHO OF T. LAGEN; TWO OF 3 ARE SAND BURROWING \& THE OTHER ROCK BOR; T.L. W NO TROCHOPHORE BUT DIRECT FROM EGG TO PELAGO; METAMORPHOSIS...; 4 MAIN TENT. STEMS OF T.L....; METAM OF OTHER TYPES...; RAPID IN SAND BURROWING FORMS TO PROTECT HEAD ORGANS..; SLOWER IN ROCK BORERS; TABLE OF CONTENTS OF DISSERTATION: INTRO, M\&M; GEN. DESCRIPT OF DEVEL \& METAMORPH; 2. CELLULAR ANATOMY OF DEVEL STAGES; 3. DISC \& COMPARISON OF DEVEL WITHIN SIPS; 4. EVOLUT. OF SIPS; SUMM, APPEND, SIT. CHAPT. OF EVOLUT.- P.195; JAGERST{\textquoteright}S THEORY - 2 SETS OF CHARACTERS - LARV. \& ADULT;... ADULTATION AS PROCESS RE JAG..; THESE LARV. CONTAIN ANCESTRAL ADULT CHARACTERS...; HIS ANCESTRAL MORPH... ADAPTIVE CHANGES IN TERMS OF LOSS OF HEAD STRUCT \& MODIF OF GUT IN RESPONSE TO SEDENTARY LIFE STYLE. THESE HUNG AROND IN LARV.; LARVL STAGE MORE CONSERVATIVE..; LATER ADULTS PRODUCED MORE YOLK > LECITHO ... THEN ANCIENT ADULT TRAITS DISSAPEARED. THIS LATER TYPE W FEWER ANCESTRAL TRAITS - (*SO THESE SPP ARE MORE SPECIALIZED?) HER MODIFIC OF JAG{\textquoteright}S.. MODEL.. PATTERN WITHIN PHYLUM; RICE{\textquoteright}S 4 MODIF IN RECENT TIMES OF LECITHO WITHIN THE PHYLUM. DIAGRAMS... FIG. 46 PHYLO TREE OF JAG. 1972 FIG. 47 COMPARISON OF DEV PATT W{\textquoteright}IN PHYL AS ENVISIONED BY DIFF WORKERS; RICE, JAG, WILL, (P.202);},
	pages = {1-218},
	keywords = {development, microfilm $\#$780l05900000},
	author = {Williams, J. A.}
}
