Table 1.

Varicosities of Cajal–Retzius cells rarely form synapses

	Layers	Number of varicosities tested	No synapse	Putative synapse	Age
Cell 1	l-m	17	16	1	P15
Cell 2	l-m, m	10	9	1	P20
Cell 3	m	32	32	0	P19
Total		59	57	2

l-m, stratum lacunosum-moleculare; m, stratum moleculare.