346 PROCEEDINGS OF THE NATIONAL MUSEUM VOL, 92 
The following specimens have been examined : 
U.S.N.M. No. 48511, 1 specimen, 65 mm., St. Pauls River, R. P. Currie. 
U.S.N.M. No. 118836, 7 specimens, 43 to 78 mm., Bellyella, Wm. M. Mann. 
U.S.N.M. No. 118837, 10 specimens, 44 to 95 mm., Bendaja, Wm. M. Mann. 
U.S.N.M. No. 118888, 16 specimens, 47 to 185 mm., Harbel, Wm. M. Mann. 
U.S.N.M. No. 118839, 5 specimens, 70 to 148 mm., Bromley, Wm. M. Mann. 
U.S.N.M. No. 118840, 2 specimens, 58 and 80 mm., Gibi Mountain, 900 feet eleva- 
tion, Wm. M. Mann. 
M.C.Z., 1 specimen, 74 mm., Gbanga, Sept. 26, 1926, G. M. Allen. 
Length of head 3 to 314 and greatest depth 214 to 224 in standard 
length; scales in 25 rows, 214 above upper lateral line to dorsal and 
514 between lower lateral line and anal fin; anal rays [X, 9 to 11, usually 
10; dorsal rays XVI or XVII, 9 to 10, usually 10. 
Order GOBIOIDEA 
KEY TO THE FAMILIES OF GOBIOIDEA FROM LIBERIA 
ja. Last or inner rays of pelvic fins connected by a membrane for more than half 
the way out toward their tips; usually a basal membrane is present. 
Gobiidae 
1b. Last or inner rays of pelvic separated to their base and not connected by a 
membrane at their base; no basal membrane______---_--------- Hieotridae 
Family GOBIIDAE 
KEY TO THE GENERA AND SPECIES OF GOBIIDS FROM LIBERIA 
1a. Dorsal rays XI to XIII-I, 11 or 12; anal I, 9 or 10; pectoral about 13; eyes 
prominent on top of head, much above the profile; scales small. 
Periophthalmus papilio Bloch 
1b. Dorsal rays VI-I, 9 to 11. 
2a. Scales 39 to 45; first few upper rays of pectoral fin filamentous; anal I, 8. 
Bathygobius soporator (Cuvier and Valenciennes) 
2b. Scales 60 to 70; first few upper rays not filamentous; anal I, 10. 
Gobius guineensis Peters 
Genus PERIOPHTHALMUS Blech 
Periophthalmus Biocu, in Schneider, Syst. Ichthy. p. 63, tab. 14,1801. (Type: P. 
papilio Bloch, in Schneider.) 
PERIOPHTHALMUS PAPILIO Bloch 
Periophthalmus papilio Biocu, in Schneider, Syst. Ichthy. p. 63, 1801. 
Gobius koelreuteri PatLas, Spicilegia, fase. 8, p. 8, pl. 2, figs. 1-8, 1770. 
Periophthalmus. koelreuteri BitTrrKorrr, Reisebilder aus Liberia, vol. 2, p. 449, 
1890 (Liberia). 
Periophthalmus koelreuteri Pallas var. papilio Bloch, STEINDACHNER, Notes Leyden 
Mus. vol. 16, p. 27, 1894 (Robertsport and Grand Cape Mountain, Liberia). 
Periophthalmus barbarus (Linnaeus) Fowtrr, Proc. U. S. Nat. Mus., vol. 56, 
p. 248, 1919 (Monrovia). 
U.S.N.M. No. 4319 contains 1 specimen collected by J. C. Breevort 
in Liberia, no specific locality. 
