Correction

In the article “The Diversity of Ganglion Cells in a Mammalian Retina,” by Rebecca L. Rockhill, Frank J. Daly, Margaret A. MacNeil, Solange P. Brown, and Richard H. Masland, which appeared on pages 3831-3843 of the May 1, 2002 issue, an incorrect version of Table 1 was inadvertently published. A coverage factor of 1.4 for retinal ganglion cells was assumed, rather than 1.8 as stated in the text. This slightly changes the values for the predicted density of retinal ganglion cells. None of the conclusions of the paper are affected. A revised version of the table is printed here.

Table 1.

Cell numbers as predicted from dendritic field size and an assumed coverage factor of 1.8 (see Results)

Type	Dendritic field diameter (μm)	Dendritic field area (μm2)	Predicted number (cells/mm2)
G1	180	25434	71
G2	224	39388	46
G3	228	40807	44
G4	230	41527	43
G4	248	48281	37
G5	299	70180	26
G6	324	82406	22
G7	379	112758	64 (16 × 4)
G8	413	133897	13
G9	482	182374	10
G10	708	393492	15 (5 × 3)
G11	874	599643	3
G11	874	599643	3
Total			397

In addition, on page 3840, left column, line 33 of the text, the predicted total should be 397 cells/mm², not 307 cells/mm².