DESCRIPTION OF THE FOSSIL REMAINS. 63 



The following descriptions of Glyptolcemus, Phaneropleuron, 

 and the Structure of Holopt3^chius, are furnished by Professor 

 Huxlej, whose position among our first-class men justly entitles 

 him to pronounce as one having authority, and whose clear 

 distinctions are founded upon a most extensive acquaintance 

 with ichthyological organization. The fine drawings and re- 

 stored figures, in particular, of the phaneropleuron and holo- 

 ptychius, show the results of the most patient study, elaborate 

 comparisons, wide generalizations, and profound knowledge of 

 the science of Palaeontology. The specific distinction of Glyp- 

 tolcemus Kinnairdi was proposed by me at the meeting, on 

 the 18th May last, of the London Geological Society, and 

 unanimously agreed to, in honour of Lord Kinnaird, whose 

 zeal in promoting the interests of geology is only equalled by 

 his enlightened endeavours to advance the interests of every- 

 thing connected with our social and industrial wellbeing as a 

 statesman. That an Agassiz and a Huxley have added the 

 weight of their high authority to both specific distinctions, in 

 the new genera of glyptol£emus and phaneropleuron, enhances 

 the value of the honour to the author and his noble friend. 



Glyptolcemus {Nov. Genus). — Huxley. Pl. III. IV. 



Glyptolcemus KinrMirdi (Nov. Species). — Huxley. 



The specimens upon whicli I have founded this new genus and species, some- 

 time ago became the property of the Museum of Practical Geology, with the 

 understanding that they should be figured for the present work, and that I 

 would furnish Dr. Anderson with an account of their characteristic peculiari- 

 ties. In the meanwhile the fish remained unnamed, but, on my exhibiting 

 them as new forms to Professor Agassiz,* during his recent visit to our 

 museum, I was glad not only to obtain his sanction to the establishment of a 

 new genus for them, but to adopt the name of Glyptolcennis,\ which he sug- 

 gested on account of the marked sculpture of the jugular plates in one of the 

 specimens. 



Of the two specimens figured, that in Plate III. affords an almost complete 



* By an inadvertency the distinguished name of Agassiz has boen printed in the plates 

 instead of Huxley. The true orthography is Glyptolcemus. 



