The structure and function of the embryonic velum of two closely related species of
Crepidula with different modes of development are examined. The velum of C. dilatata, a …

Embryos of Crepidula dilatata develop within egg capsules where they feed on nutritive
eggs also deposited within the capsules. Nutritive eggs permit the embryos to develop to a …

Ciliary feeding by tornariae of Ptychodera flava (Eschholtz) and other tornariae from the
plankton is compared with Garstang's (1939) account of feeding by these larvae, which …

Encapsulated veliger-stage embryos of the sessile vermetid gastropod Petaloconchus
montereyensis feed on a massive quantity of nurse yolk contained within their …

During the early development of Pecten maximus, the prototroch of the trochophore
becomes the rim of the velum of the veliger. The prototroch consists of a tract of randomly …

Publisher Summary This chapter discusses the functional morphology and behavior of
shelled veligers and early juveniles. A glance under low microscopic magnification of an …

A small polar lobe forms at the first and second cleavage divisions in the gastropod mollusc
Crepidula fornicata. These lobes normally fuse with the blastomeres that give rise to the D …

Evolutionary transitions between different modes of development in marine invertebrates are
thought to be biased toward the loss of feeding larvae. Because the morphology of feeding …

The morphology and histology of the planula larva of Eudendrium racemosum (Cavolini)
and its metamorphosis into the primary polyp are described from light microscopic …