@article {106,
	title = {A study of the nervous system of the sipunculoideae, with some remarks on the development of the two species <i>Phascolion strombi</i> Montagu and <i>Golfingia minuta</i> Keferstein},
	journal = {Undersokningar over Oresund},
	volume = {38},
	year = {1958},
	note = {@ SUMMARY: 1. WHERE WORK DONE 2. DEVEL OF P{\textquoteright}LION STROMBI \& G. MINUTA STUDIED. STROM VERY SIMIL TO G. VULG \& G. GOULDI - ALL PRIMITIVE; \& SIMILAR TO POLYCH. LONG BREEDING SEASON, GAMETES DEVEL IN COELOM, SPAWNING OF EPIDEMIC TYPE. EARLY CL. SPIRAL; EPIBOLIC GASTRUL.; EMBRY W 6 DAY PELAGIC STGE; DURING PELAG. STAGE THEY{\textquoteright}RE BOTTOM DWELLERS, NEVER FOUND IN PLANKTON; LECITOTROPHIC \& PELAG PH. FOR DISPERSAL ONLY. AT END OF PELAG, EGG MEMB > CUTICULA \& WITHIN THIS SHELTER THE PROTOTROCH DISOLVED \& YOLK FORCED INTO COELOM. AT SAME TIME FIRST CIRCLET OF EPIDERMAL ORGANS APPEAR. EVENTUALLY = 6 CIRCL; \& METAMERIC ARRANGEMENT (?) SAME AS IN G. ELONG.; HAVE DELECATE BRISTLES = CONDENSED SECRETION. DIR. DEV \& BROOD PROTECTIONS; LARV. EPI ORG. FORMED BUT NO BRIST \& RANDOM ARRANGM. 3. RETS \& CIRC. MUSCL DEVEL FROM ECTOMESOBLASTS. LONGI MUSCL FROM SOMATIC LAYER OF MESODERM SACS. VENT NRV CRD DELAMINATED FROM ECTODERM BEFORE CIRC. MUSC FORMED. CONNEC TISS \& PARANEURAL MUSC FROM MESOD SACS. V.N.C BEGINS AS UNPAIRED MEDIAN THICKENING. SECRE. FUNCT. THIS REDUCES LATER. 4. THESE 2 SPP COMPARED TO OTHERS 5. NERV. SYST OF 14 SPP IN 8 GENERA; SMALLER SPP W SIMPLER BRAINS, LARGER W MORE COMPLEX; IN SIPUNCULSU \& G. MINUTA BRAIN MOVED POST \& CONNECTED VIA CEREBRAL TUBE TO OUTSIDE; OTHERS W BRAIN IN CLOSE CONTACT WITH TENTAC.; CEREBR. ORG. WELL DEV IN SIP{\textquoteright}LUS ONLY. ?PERHAPS ONLY VESTIGE OF LARV. CER. ORG. EYES OF ADULT OF EVERSE TYPE - ECTODERMAL INFOLDINGS W SOLID CUTICULAR PLUGS IN S{\textquoteright}LUS, SMALL SPP (PRIM{\textquoteright}VE); IN MORE HIGHLY ORGANIZED EYES THE INNERMOST PART OF EYE IS DISTENDED \& FILLED W AMORPHOUS SECRETION. BEST DEV. EYES IS GOLF(GOLF) \& DENDROST. CYMOD.; THESE HAVE REFRACTIVE BODY IN INNER PART OF OCULAR TUBE. IN SIP{\textquoteright}LUS SECONDARY {\textquoteright}TENTACULAR{\textquoteright} EYES DEVEL; NUCHAL ORG. FOUND IN ALL; IN PHAS, ASP \& S{\textquoteright}SOMA ANT PRT OF V.N.C. CONNECTED TO SPEC. SENS ORG., POSSIBLY RUDIM STATOCYST. NEUROSECRET. IN ALL; PRODUCTS RELEASED INTO COELOM AND/OR POLIAN VESS; OTHERS INTO CENTRAL NEUROPILE. DIGITATE PROC. OF S{\textquoteright}LUS STORE NEUROSEC. PROD.; 6. V.N.C. MORPH {\textendash} NO METAM; LATERL. NRV.; PARAN MUSCL; SPEC. UNDIFFERENTIATED CELLS {\textquoteright}REGENERATION CELLS{\textquoteright} IN NRV. CRD.; WILL FORM ECTODERML PRT OF REGEN INTROV; IN S{\textquoteright}LUS TERM PRT OF VNC = TERM GANGL CONNECTS W SECRET. TERMINL ORG; SECRE EXTERNL (SEE AKES.MON)*},
	pages = {1-249},
	keywords = {development, histology, nervous, ORGAN SYST.},
	author = {{\r A}kesson, B.}
}
