Forebrain connections in the goldfish support telencephalic homologies with land vertebrates.

Horseradish peroxidase injections into dorsomedial and dorsolateral regions of the goldfish (Carassius auratus) telencephalon demonstrate, by retrograde cell labeling, that the teleost telencephalon receives a pattern of projections from the thalamus remarkably similar to those of land vertebrates. The evidence provides support for a homology between the dorsomedial region and the corpus striatum of land vertebrates and a homology between two dorsolateral regions and the dorsal and medial pallium of land vertebrates.