DESCRIPTION OF A MANDIBULAR RAMUS, ETC. 385 



Scopelosoma satellitia. — Swarming at sugar. Hexham. Sep- 

 tember, and beginning of October. 



Xanthia cerago, silago, and ferruginea. — Rather plentiful. 



Polia chi. — Plentiful, as usual, on walls near the town. A 

 dark variety (olivacea) seems peculiar to this part of the country. 



Agriopis aprilina. — At sugar. Thornley. September. 



Phytometra cenea. — Plentiful at Chopwell, flying in the sun. 

 End of June. 



XVI. — Description of a considerable portion of a Mandibular Ra- 

 mus of Anthracosaurus Russelli ; with Notes on Loxomma and 

 Archichthys. By Albany Hancock, F.L.S., and Thomas 

 Atthey. (Plate XII.) 



In 1862 Professor Huxley made known the presence in the 

 Lanarkshire Coal-field of a large and powerful Labyrinthodont, 

 to which he gave the name of Anthracosaurus Russelli* This 

 species was founded on a nearly perfect cranium ; and at the 

 same time a vertebra and a rib supposed to belong to this Am- 

 phibian were also described. No further evidence of the exist- 

 ence of this formidable creature of the Carboniferous era was 

 procured till Mr. Atthey obtained a large portion of another 

 cranium belonging to it at Newsham. This interesting fragment 

 was described, in the September number of the "Annals," in 

 1869 ; and we gave in the same paper an account of the anterior 

 extremity of a mandibular ramus and of a large sternal plate, 

 which we believed likewise to belong to Anthracosaurus. 



We are not aware that any further account has appeared of 

 the occurrence of the remains of this rare Amphibian. It is 

 therefore with much pleasure that we are enabled, through the 

 kindness of Mr. Ward, of Longton, to describe a large fragment 

 of a mandible belonging to this species. This specimen forms 



* Quarterly Journal of the Geological Society, Vol. XIX., p. 56. 



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