Finally. When interpreting his own sections. Conklin apparently saw things the simply weren’t there. Publishing before it was common practice to photograph LM sections. Conklin (1933) drew” actual sections” (his text figure A) of fertilized branchiostoma egg showing the ectoplasm. The chorda-neural crescent . the endoderm .and the mesodermal crescent with its distinctive granules. This erroneous drawing has been reproduced in modern texts
(e.g. Wickstead. 1975) and is sole evidence for an ascidian-like ooplassmic segregation in lancelets.