Larval features in <i>Mycale laevis</i>.

<p>A. Larval cells filled with homogeneous (ho) and heterogeneous (he) yolk, large mitochondria (mi), round large nucleus (n), interspersed bacteria (b), and collagen (co). B. Detail of bacteria (b) among larval cells. C. Detail of morphology of round larval cells with homogeneous (ho) and heterogeneous (he) yolk. D. Detail of heterogeneous yolk platelet. E. Sclerocyte showing a cross-section of siliceous spicule (s) in the mid part of the larva. F. Detail of collagen fibers in the mid part of the larva.