Ant Lion, Giant: does it need "Burrow 20'" or such like the Ankheg, Bulette, etc.?
Ape, Gorilla: capitalize "wild" & "lair"
Boglin: end of first XP line needs a semi-colon after "3 HD 175" (see Eel, Giant)
Canein: "vs" needs a period
Derej Cat: should its attack be "2 claws" (& therefor "Dam 1d6/1d6")
Dinosaur, Raptor (Velociraptor): should its attack be "2 claws" (& therefor "Dam 1d4/1d4")
Dragon, Brown: needs to be "1, Wild 1, Lair 1d4"
Dragonne: needs to be "1d6, Wild 1d6, Lair 1d10"
Drat: either needs asterisk removed, or AC needs single-/double-dagger
Elemental, Wood: change to "Mv 40'" (see
here; if so then Cold & Lightning Elementals needs to be changed as well
Frost Worm: XP needs comma
Gibbering Mouther: does it need/warrant a swim movement rate?
Hippocampus/Kelpie: put space around slash
Also, possibly put Kelpie stat differences in parentheses rather than after a slash?
Infernal, Imp*: since it can be hit w/ silver weapons, shouldn't its AC have a single-dagger rather than double?
Infernal, Lemure: change instances of "hp" to "HP" (per the Style Guide)
Infernal, Quasit*: on its damage line fix spacing around "poison"
Jack O'Lantern: movement rate should be "Fly 20'"
Kraken: movement rate should be "Swim 40'"
Lich*: reference to Basic Fantasy RPG Core Rules should be bold (per the Style Guide), also in last paragraph change "hp" to "HP"
Locathah: capitalize "swim", change "Save As" to "Fighter: 2"
Megatherium: change "1d4 wild" to "Wild 1d4"
Monkey, Common & Baboon: move "Wild" before "3d6" on both
Nazgorean, Hydramander: end of first XP line needs a semi-colon after "10 HD 1,300"
Nazgorean, Spiderwolf: move "Wild" before "2d4"
Orc, Snow: In "No. Appearing" insert line break before "Horde"
Otter (Common and Giant): change "hp" to "HP"
Pseudodragon: add commas in "No. Appearing" line
Ram, War: In "Treasure Type", capitalize "none"
Roper*: end of first XP line needs a semi-colon after "11 HD 1,670"
Rot Vulture: add commas in "No. Appearing" line
Sahuagin: needs a swimming movement rate (
as noted by Al)
Satyr: In "No. of Attacks", should be "1 head butt/1 dagger or 1 shortbow"
Shield Guardian: needs asterisk after its name (due to the double-dagger AC), description may need to note impervious to non-magical weapons as well
Snail, Giant Cone: "No. Appearing" line should be "1d3, Wild 1d3, Lair 1d3" (or perhaps just "1d3"?)
Snake, Giant Two-Headed: should "poison" be moved to damage line? (see Snake, Vort below it [as well as the spider entries] to compare)
Thulid: end of first 3 lines in "XP" need a semi-colon at the end
Vermen: In "No. Appearing" the "2d6X10" needs to be "2d6x10"