River jack

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(Zool.) an African puff adder (Clotho nasicornis) having a spine on the nose.

See also: River

References in periodicals archive ?
Reserves: Anchor Hawk (A), Another Pocket (B) (W), Bogside Honcho (C), Carey's Savings (D), Dartfield Lady (E), Docks Joan (F), Ellie's Oscar (G), Fatman (H) (M), Fifteens High (I), Glenville (J) (M), Hollywell Dixie (K), Kizzys Hawk (L) (M), Muggle Maldini (M) (M), River Jack (N) (M), Tedo Guss (O) (M), Westfarm Setch (P) (M), Woodcraft Slaney (Q) (M).
56 (450m): Mays Timbera, Fire Height Peg, Pioneer Flight, Mackem Bonny (M), River Jack (M), Laser Bill (M).
The stone used was split river jacks whose specifications required a hardness resistance to acid attack complying with Section 674.