Preliminary notices of deep-sea fishes collected during the voyage of the H. M. S. “ Challenger ” Author Günther, Albert C. L. G. text Annals and Magazine of Natural History 1878 5 2 17 28 journal article 10.5281/zenodo.28079 101EC135-709C-48A6-9878-C4371F19409C Acanthonus armatus . The head of this remarkable fish appears of an extraordinary thickness compared with the thin and compressed trunk and tail; it is very broad across the frontal region, and not much longer than high, the small eye being much nearer to the end ot the snout than to the gill-opening. The snout would be truncated in front; but its upper portion projects, terminating in two short acute spines. The large mouth is slightly oblique, the maxillary extending backwards beyond the middle of the length of the head. The jaws are equal in front. Two sharp edges run along each ramus of the mandible, to receive between them a wide muciferous channel. North of New Guinea, 1075 fathoms.