. The annals and magazine of natural history : zoology, botany, and geology . e appear-ance of E. connala connata, but no males of that formare forthcoming from the same island to support thatidentirication. Erythrodiplax nigricans, Ramb. 3 J , 6 $ , Isla Ella, Rio Parana, x. 1919 ; 7 c^, 4 ? , IslaLos Cisnes, Rio Parana, 1920. These specimens belong to the typical form of the species,in which the wings are frequently marked with a smallbrown cloud beneath the pterostigma. It may be worthy ofnote that, while this cloud is present in the case of morethan half the specimens from Isla * L
. The annals and magazine of natural history : zoology, botany, and geology . e appear-ance of E. connala connata, but no males of that formare forthcoming from the same island to support thatidentirication. Erythrodiplax nigricans, Ramb. 3 J , 6 $ , Isla Ella, Rio Parana, x. 1919 ; 7 c^, 4 ? , IslaLos Cisnes, Rio Parana, 1920. These specimens belong to the typical form of the species,in which the wings are frequently marked with a smallbrown cloud beneath the pterostigma. It may be worthy ofnote that, while this cloud is present in the case of morethan half the specimens from Isla * Los Cisnes (4c?, 2 ? ),it does not appear to be exhibited at all by any of those fromIsla Ella. 296 On a new Ed from Tohaejo. XXXVIII.—A neio Eel from J. R. Norman. (Published by permission of the Trustees of the British Museum.) ACANTIIENCHELYS, gen. nov. Closely related to 0/)hichthi/., but distinguished by tliestructure of the anal fin, which is very similar to the dorsalfin o( Zoarces, having a seiies of short spines not far fromtlie end of the Tail of Acanthenchelys spinicaiida. Acanthenchelys spinicauda^ sp. n. Depth of body at origin of dorsal 2f in length of head,which is about 3 in distance from gill-opening to vent;length of tail about equal to that of head and trunk. Snoutbroad and obtusely rounded, If times diameter of eye, whichis nearly twice in interorbital width. Jaws equal anteriorly;cleft of mouth 2| times length of snout, extending wellbeyond posterior border of eye. Teeth pointed, in a doubleseries in each jaw ; vomerine teeth in a single series, at leastposteriorly. Origin of dorsal just behind end of pectoral,which is nearly ^ length of head. Anal fin with about 20spines. Brownish, lighter below; about fourteen darkerbands across the back, narrower than the interspaces, notcontinued below lateral line ; fins yellow. A single specimen, 1100 mm. in total length, from Tobago,collected and presented to the British Museum by Mr. Gup
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Keywords: ., bookcentury1800, bookdec, booksubjectnaturalhistory, bookyear1838
