Figure 2. Differentiation without cleavage; micrographs of semi-thin sections. (A) A normal 24 hr trochophore larva (from Eckberg, 1981b). (B) An embryo from the same batch that underwent differentiation without cleavage (from Fig. 4 of Eckberg and Kang, 1981, by copyright permission of Springer-Verlag). Scale bar = 100 µm.