98 EXTINCT MONSTERS 
classification of their various members is a difficult one, which 
only time and further discoveries can settle. 
Loxomma is another genus of the Coal period, but only the 
head is known (see Plate VII.). It was named by Professor 
Huxley, who, during a visit to Edinburgh in 1862, made a 
study of the large collection of vertebrate fossils from Burdie 
House and Gilmerton in the Museum of Edinburgh. While 
looking through the collection for fossil fishes, he came upon 
some specimens which were of quite a different character, and 
Fic. 19.—Labyrinthodonts. 1, a, b, Cricotus. 2. Skull of Eryops. From 
Permian strata, Texas. (After Cope.) 
among these found part of the skull of a Labyrinthodont, 
which he named Loxomma. A very beautifully preserved 
specimen of the skull of this creature, from the coal-measures 
