NOTES ON ADULT MORPHOLOGY AND LARVAL DEVELOPMENT OF TUBILUCHUS-CORALLICOLA (PRIAPULIDA), BASED ON INVIVO AND SCANNING ELECTRON-MICROSCOPIC EXAMINATIONS OF SPECIMENS FROM BERMUDA

Observations are reported on the morphology of adults of both sexes and of several larval forms. The later are separated into 4 groups due to differences exhibited inter alia in the lorica length and in the number of scalids, neck folds and tubuli. The larvae are compared with those previously described from Curacao and Barbado; at present 6 larval stages of T. corallicola can be distinguished. The functional significance of certain structures in adults and larvae is discussed and a few observations on the behavior of the animals are noted. Most of the details described are illustrated with photomicrographs and the pharyngeal armature in larvae is documented with scanning electron micrographs.